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Keysight Technologies 81950A User Manual
Keysight Technologies 81950A User Manual

Keysight Technologies 81950A User Manual

Compact tunable laser source module

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Summary of Contents for Keysight Technologies 81950A

  • Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
  • Page 2 Keysight 81950A Compact Tunable Laser Source Module User’s Guide...
  • Page 5: Warranty

    Notices © Keysight Technologies 2012, 2015 Warranty computer software” as defined in FAR 52.227-19 (June 1987) or any equivalent No part of this manual may be reproduced The material contained in this agency regulation or contract clause. Use, in any form or by any means (including document is provided “as is,”...
  • Page 6: Keysight Technologies Sales And Service Offices

    Keysight Technologies Sales and Service Offices For more information about Keysight Technologies test and measurement products, applications, services, and for a current sales office listing, visit our web site: http://www.keysight.com/find/lightwave You can also contact one of the following centers and ask for a test and measurement sales representative.
  • Page 7 This chapter provides a general description of the specific features of the 81950A compact tunable laser module. Chapter 4, “Programming Instructions" This chapter describes the SCPI Commands for use of 81950A compact tunable laser modules and N7711A, N7714A single and 4-port Tunable Laser System Sources.
  • Page 8: Table Of Contents

    Front Panel Controls and Indicators Typical Use Models Optical Output Polarization Maintaining Fiber Angled and Straight Contact Connectors Signal Input and Output Accessories Modules and Options Modules Options Connector Interfaces User’s Guides Operating Instructions Operation Parameters Keysight 81950A Compact TLS module, Edition 3...
  • Page 9 The SOURce:CHANnel:POWer sub tree The SOURce:CHANnel:WAVelength sub tree The SOURce:CHANnel:FREQuency sub tree The SOURce:CHANnel:MODUIation sub tree Error Messages Status Bits Differences among 81950A, N7711A and N7714A 81950A Only N771A, N7714A Only Specifications Definition of Terms Keysight 81950A Compact TLS module, Edition 3...
  • Page 10 Which Cleaning Procedure should I use? How to clean connectors How to clean connector interfaces How to clean bare fiber adapters How to clean instruments with a fixed connector interface Additional Cleaning Information Keysight 81950A Compact TLS module, Edition 3...
  • Page 11 Other Cleaning Hints Index Keysight 81950A Compact TLS module, Edition 3...
  • Page 12: Getting Started

    Getting Started This chapter provides a general description of Keysight 81950A Tunable Laser Source Family. Safety Considerations ......12 Safety Symbols .
  • Page 13: Safety Considerations

    Keysight Technologies assumes no liability for the customer’s failure to comply with these requirements. Before operation, review the instrument and manual, including the red safety page, for safety markings and instructions.
  • Page 14: Initial Inspection

    Operating Environment The safety information in your mainframe’s User’s Guide summarizes the operating ranges for the Keysight 81950A Compact Tunable Laser Source modules. In order for these modules to meet specifications, the operating environment must be within the limits specified for your mainframe.
  • Page 15: Input/Output Signals

    +- 5V when applying external voltage. Storage and Shipment A Keysight 81950A Compact Tunable Laser Source module can be stored or shipped at temperatures between - 40°C and + 70°C. Protect the module from temperature extremes that may cause condensation within it.
  • Page 16: Initial Safety Information For Tunable Laser Modules

    * Max. CW output power is defined as the highest possible optical power that the laser source can produce at its output connector. ** Max. permissible CW output power is the highest optical power that is permitted within the appropriate laser class. Keysight 81950A Compact TLS module, Edition 3...
  • Page 17: Laser Safety Labels

    Laser Safety Labels Laser class 1M label Figure 1 Class 1M Safety Label - 81950A A sheet of laser safety labels is included with the laser module as required. In order to meet the requirements of IEC 60825-1 we recommend that you...
  • Page 18: Introduction

    What is a Tunable Laser Source? A Tunable Laser Source (TLS) is a laser source for which the wavelength can be varied through a specified range. The Keysight Technologies range of TLS modules also allow you to set the output power, and to choose between continuous wave or modulated power.
  • Page 19: Front Panel Controls And Indicators

    [State] parameter in the instrument’s Graphical User Interface, or remotely using SCPI commands. When the Active LED is lit the source is emitting radiation. When the Active LED is not lit the source is not emitting radiation. Keysight 81950A Compact TLS module, Edition 3...
  • Page 20: Typical Use Models

    Low linewidth source for complex modulation formats The low linewidth of the Keysight 81950A Compact TLS module makes this module an ideal light source for transmission systems with (D)QPSK and higher order modulation formats and and as local oscillator for coherent receivers.
  • Page 21: Specifications

    Getting Started Typical Use Models Specifications: For further details on specifications, see the “Specifications” on page Keysight 81950A Compact TLS module, Edition 3...
  • Page 22: Optical Output

    Fiber Cladding Fiber Core (8-µm Diameter) Stress Rods Slow Axis (Polarization Axis) Not to Scale Figure 3 PMF Output Connector Chapter 2, “Modules and Options" for further details on connector interfaces and accessories. Keysight 81950A Compact TLS module, Edition 3...
  • Page 23: Angled And Straight Contact Connectors

    Getting Started Optical Output Angled and Straight Contact Connectors Angled contact connectors are available as an option for Keysight 81950A Tunable Laser Source Familys. Angled contact connectors help you to control return loss, since reflected light tends to reflect into the cladding, reducing the amount of light that reflects back to the source.
  • Page 24: Signal Input And Output

    There is one BNC input connector on the front panel of a Keysight CA U TI O N 81950A Compact Tunable Laser Source module. To prevent the BNC interface from damage, do not exceed the voltage limit of +- 5V when applying external voltage. Keysight 81950A Compact TLS module, Edition 3...
  • Page 25 Getting Started Signal Input and Output Keysight 81950A Compact TLS module, Edition 3...
  • Page 26: Accessories

    Accessories The Keysight 81950A Tunable Laser Source Family is available in various configurations for the best possible match to the most common applications. This chapter provides information on the available options and accessories. Modules and Options ......26 Modules .
  • Page 27: Modules And Options

    Accessories Modules and Options Modules and Options Figure 5 shows all the options that are available for Keysight 81950A Tunable Laser Source Family, and the instruments that support these modules. High Power Compact Tunable Laser module High Power 81950A Compact Tunable Laser Source 1527nm-1566nm...
  • Page 28: Modules

    Modules and Options Accessories Modules Keysight 81950A Tunable Laser Source Family can be hosted by: • 8163A and 8163B Lightwave Multimeters, • 8164A and 8164B Lightwave Measurement Systems, • 8166A and 8166B Lightwave Multichannel Systems. Table 1 Compact Tunable Laser Modules...
  • Page 29: Connector Interfaces

    Table 3 Angled Contact Connector Interfaces Description Model number E-2000 APC Keysight 81000 HI SC/APC Keysight 81000 KI FC/APC Keysight 81000 NI DIN 47256 / 4108.6 Keysight 81000 SI Connect your cable. Keysight 81950A Compact TLS module, Edition 3...
  • Page 30: User's Guides

    The following User’s Guides are applicable to these Tunable Laser Source Family: Table 4 User’s Guides Description Part Number Keysight 81950A Compact Tunable Laser Source module User’s 81950-90B01 Guide. 8163A/B Lightwave Multimeter, 8164A/B Lightwave 08164-90B15 Measurement System, & 8166A/B Lightwave Multichannel System User’s Guide.
  • Page 31 Accessories User’s Guides Keysight 81950A Compact TLS module, Edition 3...
  • Page 32: Operating Instructions

    This chapter provides a general description of the specific features of instruments using the 81950A compact tunable laser module. Operation ......... 33 Parameters.
  • Page 33 Operating Instructions Symbols used in this chapter Symbols Description  wavelength frequency reference frequency f frequency offset grid spacing channel number (i.e. ITU grid channel number) Keysight 81950A Compact TLS module, Edition 3...
  • Page 34: Operation

    SBS suppression FM frequency • Signaling or trace tone AM level The AM modulation is only available with the Keysight 81950A module using the BNC connector at the module's front panel. The N7711A / N7714A instruments platform features no such connector.
  • Page 35: Changing The Grid (F0, S)

    • Auto Mode to Grid Mode: is saved and , and are restored.  • Grid Mode to Auto Mode: The manually set values , and saved. The last frequency set in Auto Mode before is restored. Keysight 81950A Compact TLS module, Edition 3...
  • Page 36: Preset Values

    Differences to Other Tunable Laser Source Modules The 81950A compact tunable laser source modules are intended for use as a highly stable high power laser source. They use a different technology which makes them slower when switching on the laser or changing the power or wavelength.
  • Page 37: The Graphical User Interface

    A/B) or "SLock" (8164 A/B). The instrument can also be locked and unlocked using a remote command: N O T E "LOCK 0|1, <password>". Example: unlock the instrument using password "1234": lock 0,1234 Keysight 81950A Compact TLS module, Edition 3...
  • Page 38: How To Set A Parameter

    N O TE states. • If a parameter is not displayed on the screen, it can alternatively be accessed using the [Menu] soft key, which opens a menu with all currently available parameters: Keysight 81950A Compact TLS module, Edition 3...
  • Page 39 Operating Instructions The Graphical User Interface Keysight 81950A Compact TLS module, Edition 3...
  • Page 40: How To Set The Power

    [Pwr unit] soft key. • Use the [Pmax] soft key to set the maximum power, or • Change the value as described in chapter “How to Set a Parameter” on page Keysight 81950A Compact TLS module, Edition 3...
  • Page 41: How To Switch Operation Mode

    " Auto Mode". • Press the [OK] soft key. • Use the Up or Down key to select an operation mode. • Press the [OK] soft key to apply the changed value. Keysight 81950A Compact TLS module, Edition 3...
  • Page 42 The Graphical User Interface Operating Instructions Details Screen in Auto Mode Keysight 81950A Compact TLS module, Edition 3...
  • Page 43 Operating Instructions The Graphical User Interface Details Screen in Grid Mode (i.e. Auto Mode off) Keysight 81950A Compact TLS module, Edition 3...
  • Page 44: How To Set The Wavelength Or Frequency

    • If you want to switch from wavelength to frequency or back press the [Freq/Wvl] soft key. • Change the value as described in chapter “How to Set a Parameter 37” on page Keysight 81950A Compact TLS module, Edition 3...
  • Page 45: How To Switch On The Laser

    • When finished press [Enter], the Modify Knob, or the [OK] soft key. You can also cancel the operation using the [Cancel] soft key. You can also use the module's front panel key to switch the laser state. N O T E Keysight 81950A Compact TLS module, Edition 3...
  • Page 46: How To Set Frequency Parameters In Grid Mode

    [Menu] soft key to access it). • Change the value as described in chapter “How to Set a Parameter” on page Reference frequency and grid spacing can only be changed if the laser is N O TE off. Keysight 81950A Compact TLS module, Edition 3...
  • Page 47: How To Check The Output Frequency Or Wavelength

    "Output" group box on the "Details Screen" or can be checked in the menu. (Press the [Menu] soft key to open the menu.) These values are read only. N O T E Keysight 81950A Compact TLS module, Edition 3...
  • Page 48: How To Modulate A Signal

    • The signal supplied via the front panel BNC connector has no effect unless the AM level is non-null. Status Line  f  The Status line displays " " (8164x) or " " (8163x, 8166x) if the frequency offset doesn't equal 0: Keysight 81950A Compact TLS module, Edition 3...
  • Page 49 RPG, the [OK] soft key, or the [Enter] hard key. This behavior differs from other modules where changed values are sent immediately. Keysight 81950A Compact TLS module, Edition 3...
  • Page 50: The User Interface

    (at boot time) initializing hardware blinking fast boot error laser is off blinking slowly laser is on and working, i.e. changing frequency, power or laser state laser is on, frequency and power are stable Keysight 81950A Compact TLS module, Edition 3...
  • Page 51 Operating Instructions The User Interface Keysight 81950A Compact TLS module, Edition 3...
  • Page 52: Programming Instructions

    81950A Only........
  • Page 53: Summary

    Programming Instructions Summary Summary • This chapter refers to both the 81950A module and the N7711A/N7714A instruments. The N771xA command set is derived from the 8163A/B, 8164A/B, and 8166A/B command set. • Please refer to the 8163A/B, 8164A/B, 8166A/B Programming Guide for an introduction to programming instruments and for information about programming and syntax conventions.
  • Page 54 Internal modulation rate. page 68 :INTernal:WAVeform? Internal modulation waveform. page 69 :EXTernal[:STATe]/? Sets or returns the state of the amplitude modulation. page 69 :EXTernal:AM[:LEVel]/? Sets or returns signaling or trace tone AM level. page 70 Keysight 81950A Compact TLS module, Edition 3...
  • Page 55: Detailed Description

    Description Switches the laser on or off. Parameters OFF or 0: Disable the output ON or 1: Enable the output Response none Example outp1 on Affects Notes This is the same as [:SOURce[n]][:CHANnel[m]:POWer:STATe Keysight 81950A Compact TLS module, Edition 3...
  • Page 56 Detailed Description Programming Instructions Command :OUTPut[n][:CHANnel[m][:STATe]? Syntax :OUTPut[n][:CHANnel[m][:STATe]? Description Queries the laser state. Parameters none Response 0: Disabled 1: Enabled Example outp1? Affects Notes This is the same as [:SOURce[n]][:CHANnel[m]:POWer:STATe? Keysight 81950A Compact TLS module, Edition 3...
  • Page 57: The Source:channel:power Sub Tree

    Optional: MIN - minimum programmable value MAX - maximum programmable value DEF - default value Response The current power value or the minimum, maximum, or default power value. Example sour1:pow? +2.00000000E-002 Affects Notes Keysight 81950A Compact TLS module, Edition 3...
  • Page 58 Sets whether the power unit used is dBm or W. Parameters DBM or 0: Sets the power unit to dBm Watt or 1: Sets the power unit to W Response none Example sour1:pow:unit w Affects Notes This is the same as :OUTPut[n][:CHANnel[m]:POWer:UNIT Keysight 81950A Compact TLS module, Edition 3...
  • Page 59 Queries whether the power unit used is dBm or W. Parameters none Response 0: the power unit is dBm +1: the power unit is W Example outp1:pow:un? +1<END> Affects Notes This is the same as :OUTPut[n][:CHANnel[m]:POWer:UNIT? Keysight 81950A Compact TLS module, Edition 3...
  • Page 60: The Source:channel:wavelength Sub Tree

    The current wavelength value or the minimum, maximum, or default wave- length value. Example sour1:wav? +1.60000000E-006 Affects Notes "CW" and "FIXED" have no specific meaning, these mnemonics were just add- ed for backward compatibility Keysight 81950A Compact TLS module, Edition 3...
  • Page 61 [:SOURce[n]][:CHANnel[m]]:WAVelength:AUTO? Command Syntax [:SOURce[n]][:CHANnel[m]]:WAVelength:AUTO? Description Returns the current operation mode. Parameters none Response 0: "Grid Mode" (= Auto Mode off) 1: "Auto Mode" Example sour1:wav:auto? Affects Notes This query is equivalent to [:SOURce[n][:CHANnel[m]]:FREQuency:AUTO? Keysight 81950A Compact TLS module, Edition 3...
  • Page 62: The Source:channel:frequency Sub Tree

    MIN - minimum programmable value MAX - maximum programmable value DEF - default value Response The current frequency value or the minimum, maximum, or default frequency value. Example sour1:freq? +1.88000000E+014 Affects Notes Command [:SOURce[n]][:CHANnel[m]]:FREQuency:REFerence Syntax [:SOURce[n]][:CHANnel[m]]:FREQuency:REFerence<wsp> <value>[HZ|KHZ|MHZ|GHZ|THZ]|MIN|MAX|DEF Keysight 81950A Compact TLS module, Edition 3...
  • Page 63 Set the grid spacing for the frequency grid used by the instrument. Parameters Any value in the specified range (see appropriate User's Guide) Also allowed: MIN - minimum programmable value MAX - maximum programmable value DEF - default value Keysight 81950A Compact TLS module, Edition 3...
  • Page 64 DEF - default value Response None Example sour1:freq:chan -20 Affects Notes Only available in "Grid Mode". The minimum, maximum, and default value depend on the current reference fre- quency and grid spacing values. Keysight 81950A Compact TLS module, Edition 3...
  • Page 65 Any value in the specified range (see appropriate User's Guide) Also allowed: MIN - minimum programmable value MAX - maximum programmable value DEF - default value Response None Example sour1:freq:offs 0.1e9 Affects Notes Only available in "Grid Mode" Keysight 81950A Compact TLS module, Edition 3...
  • Page 66 Switch between "Auto Mode" and "Grid Mode", Refer to the chapter “Opera- tion Modes” on page Parameters OFF or 0: "Grid Mode" (= Auto Mode off) ON or 1: "Auto Mode" Response None Example sour1:freq:auto on Keysight 81950A Compact TLS module, Edition 3...
  • Page 67 Command [:SOURce[n]][:CHANnel[m]]:FREQuency:AUTO? Syntax [:SOURce[n]][:CHANnel[m]]:FREQuency:AUTO? Description Returns the current operation mode. Parameters none Response 0: "Grid Mode" (= Auto Mode off) 1: "Auto Mode" Example sour1:freq:auto? Affects Notes This query is equivalent to [:SOURce[n][:CHANnel[m]]:WAVelength:AUTO? Keysight 81950A Compact TLS module, Edition 3...
  • Page 68: The Source:channel:moduiation Sub Tree

    Syntax [:SOURce[n]][:CHANnel[m]]:MODUlation:INTernal[:STATe]? Description Returns the internal modulation state. Parameters None Response 0: off 1: on Example sour1:modu:int? Affects Notes Command [:SOURce[n]][:CHANnel[m]]:MODUlation:INTernal:SBSControl[:LE Vel] Syntax [:SOURce[n]][:CHANnel[m]]:MODUlation:INTernal:SBSControl[:LEVel] <wsp> <value>[HZ|KHZ|MHZ|GHZ|THZ]|MIN|MAX|DEF Description Sets the internal frequency modulation frequency. Keysight 81950A Compact TLS module, Edition 3...
  • Page 69 Returns the internal modulation rate in Hz. Parameters None Response The internal modulation rate in Hz. Example sour:modu:int:rate? +2.00000000E+004 Affects N7711A, N7714A only Notes There is no corresponding command, because the hardware does not allow set- ting this value. Keysight 81950A Compact TLS module, Edition 3...
  • Page 70 Example sour1:modu:ext on Affects 81950A only Notes Command [:SOURce[n]][:CHANnel[m]]:MODUlation:EXTernal[:STATe]? Syntax [:SOURce[n]][:CHANnel[m]]:MODUlation:EXTernal[:STATe]? Description Returns the state of the external amplitude modulation. Parameters None Response 0: off 1: on Example sour1:modu:ext? Affects 81950A only Notes Keysight 81950A Compact TLS module, Edition 3...
  • Page 71 MIN - minimum programmable value MAX - maximum programmable value DEF - default value Response The current amplitude modulation level or the minimum, maximum, or default amplitude modulation level. Example sour1:modu:ext:am? +2.00000000E+000 Affects 81950A only Notes Keysight 81950A Compact TLS module, Edition 3...
  • Page 72: Error Messages

    • -221, "Not allowed while frequency auto mode is off" - you tried to issue a command which is only supported in auto mode. • -221, "Settings conflict" - returned if the laser module reports an invalid configuration Keysight 81950A Compact TLS module, Edition 3...
  • Page 73: Status Bits

    The questionable condition and event registers can be queried using • :STATus[m]:QUEStionable:CONDition? • :STATus[m]:QUEStionable:EVENt? Please refer to the Keysight 8163A/B, 8164A/B, 8166A/B Programming Guide for detailed information about the status model. Keysight 81950A Compact TLS module, Edition 3...
  • Page 74: Differences Among 81950A, N7711A And N7714A

    Differences among 81950A, N7711A and N7714A Programming Instructions Differences among 81950A, N7711A and N7714A Some commands are not available on both platforms 81950A Only • [:SOURce[n]][:CHANnel[m]]:MODUlation:EXTernal[:STATe]/? • [:SOURce[n]][:CHANnel[m]]:MODUlation:EXTernal:AM[:LEVel]/? N771A, N7714A Only • [:SOURce[n]][:CHANnel[m]]:MODUlation:INTernal:RATE? • [:SOURce[n]][:CHANnel[m]]:MODUlation:INTernal:WAVeform? Keysight 81950A Compact TLS module, Edition 3...
  • Page 75 Programming Instructions Differences among 81950A, N7711A and N7714A Keysight 81950A Compact TLS module, Edition 3...
  • Page 76 Compact Tunable Laser Module Specifications ..87 Keysight 81950A Compact Tunable Laser Source ... 88 Specifications ......... 89...
  • Page 77: Specifications

    Specifications apply, unless otherwise noted, for the stated environmental conditions, after warm-up, in CW mode (unmodulated output, SBS suppression off) and at uninterrupted line voltage. “Constant temperature” is a stable operating temperature within ±1 K. Keysight 81950A Compact TLS module, Edition 3...
  • Page 78: Definition Of Terms

    Wavelength resolution........86 Wavelength (frequency) stability ......86 Keysight 81950A Compact TLS module, Edition 3...
  • Page 79: Absolute Wavelength (Frequency) Accuracy

    Alternatively, Using a heterodyning technique: The output of the laser under test is mixed with another laser of the same type on a wide bandwidth photodetector. The electrical noise spectrum of the photodetector current is measured with Keysight Lightwave signal Keysight 81950A Compact TLS module, Edition 3...
  • Page 80: Maximum Output Power

    Output isolation The insertion loss of the built-in isolator in the backward direction. Measurement: This characteristic cannot be measured from outside the module. It is based on known isolator characteristics. Keysight 81950A Compact TLS module, Edition 3...
  • Page 81: Polarization Extinction Ratio

    Poincaré sphere. Calculate the polarization extinction ratio from the diameters of these circles. Figure 6 Circular traces on the Poincaré sphere used to calculate polarization extinction ra- tio. Keysight 81950A Compact TLS module, Edition 3...
  • Page 82: Power Flatness Versus Wavelength

    (in dBm). Conditions: Uninterrupted tunable laser source output power, constant wavelength setting, constant temperature. The long-term power repeatability can be obtained by taking the power N O TE repeatability and power stability into account. Keysight 81950A Compact TLS module, Edition 3...
  • Page 83: Power Stability

     fluctuation amplitude within a specified frequency range f and for bandwidth B, and the square of the average optical power P RIN, if expressed as “dB/Hz”, is calculated by: Conditions: As specified. Keysight 81950A Compact TLS module, Edition 3...
  • Page 84: Relative Wavelength (Frequency) Accuracy

    Specifies the ratio of the optical power incident to the tunable laser source output port at the wavelength set on the tunable laser source, to the power reflected from the tunable laser source output port. Conditions: Tunable laser source output off. Keysight 81950A Compact TLS module, Edition 3...
  • Page 85: Sbs Suppression - Effective Linewidth

    (SSE) power. The SSE power is determined in a specified bandwidth within a ±3 nm window around the signal wavelength, where ±1 nm around the signal wavelength are excluded, expressed in dB per Keysight 81950A Compact TLS module, Edition 3...
  • Page 86: Tuning Time

    TLS until the tuning operation has finished. Measurement principles are indicated. Alternative measurement principles of equal value are also acceptable. Wavelength range The range of wavelengths for which the specifications apply (if not otherwise specified). Keysight 81950A Compact TLS module, Edition 3...
  • Page 87: Wavelength (Frequency) Repeatability

    (frequencies). Conditions: Time span as specified, uninterrupted tunable laser source output power, constant wavelength and power level settings, constant temperature. Measurement principles are indicated. Alternative measurement principles of equal value are also acceptable. Keysight 81950A Compact TLS module, Edition 3...
  • Page 88: Compact Tunable Laser Module Specifications

    Specifications Keysight 81950A Compact Tunable Laser Source ....88 Specifications........... 89...
  • Page 89: Keysight 81950A Compact Tunable Laser Source

    Dimensions (H x W x D) 75 x 32 x 335 mm Weight 0.45 kg At maximum output power, as specified, per wavelength range At constant temperature ± 0.5 K Including power stabilization Keysight 81950A Compact TLS module, Edition 3...
  • Page 90: Specifications

    Output isolation (typical) 81950A 30 dB Wavelength stability (typical, over 1 min) ± 0.5 pm Polarization maintaining fiber Options 071 and 072 Fiber type Panda Orientation TE mode in slow axis, in line with connector key Keysight 81950A Compact TLS module, Edition 3...
  • Page 91 Connector option (required) Tunable laser must be ordered with one connector option Option 071 PMF, straight contact output connector Option 072 PMF, angled contact output connector Connector interface One Keysight 81000xI-Series connector interface is required Keysight 81950A Compact TLS module, Edition 3...
  • Page 92: Cleaning Information

    Cleaning Information The Cleaning Instructions provided in this chapter apply to a number of different types of Optical Equipment. Cleaning Instructions for this Module If you must clean the Keysight Tunable Laser Source Family, please refer the module to the skilled personnel of Keysight’s service team.
  • Page 93: Cleaning Instructions

    If you are unsure of the correct cleaning procedure for your optical device, we recommend that you first try cleaning a dummy or test device. Keysight Technologies assume no liability for the customer’s failure to comply with these requirements. Safety Precautions Please follow the following safety rules: •...
  • Page 94: Why Is It Important To Clean Optical Devices

    In this section, we want to suggest ways to help you clean your various optical devices, and thus significantly improve the accuracy and repeatability of your lightwave measurements. Keysight 81950A Compact TLS module, Edition 3...
  • Page 95: What Do I Need For Proper Cleaning

    Pipe cleaner • Compressed air Dust and shutter caps All of Keysight Technologies’ lightwave instruments are delivered with either laser shutter caps or dust caps on the lightwave adapter. Any cables come with covers to protect the cable ends from damage or contamination.
  • Page 96 The best way to use a pipe cleaner is to push it in and out of the device opening (for example, when cleaning an interface). While you are cleaning, you should slowly rotate the pipe cleaner. Keysight 81950A Compact TLS module, Edition 3...
  • Page 97: Additional Cleaning Equipment

    A microscope helps you to estimate the type and degree of dirt on your device. You can use a microscope to choose an appropriate cleaning Keysight 81950A Compact TLS module, Edition 3...
  • Page 98 Take care never to look into the end of a fiber or any other optical component, when they are in use. This is because the laser can seriously damage your eyes. Keysight 81950A Compact TLS module, Edition 3...
  • Page 99: Preserving Connectors

    Keep the caps on the equipment always when it is not in use. All of Keysight Technologies’ lightwave instruments and accessories are shipped with either laser shutter caps or dust caps. If you need additional or replacement dust caps, contact your nearest Keysight Technologies Sales/Service Office.
  • Page 100: Which Cleaning Procedure Should I Use

    “Cleaning Instructions for this Module” on page 91 for the procedure relevant for this instrument. If you are unsure of how sensitive your device is to cleaning, please contact the manufacturer or your sales distributor. Keysight 81950A Compact TLS module, Edition 3...
  • Page 101: How To Clean Connectors

    Take a new, dry soft-tissue and remove the alcohol, dissolved sediment and dust, by rubbing gently over the surface using a small circular movement. Blow away any remaining lint with compressed air. Keysight 81950A Compact TLS module, Edition 3...
  • Page 102: An Alternative Procedure

    Hold the tip of the connector in the bath for at least three minutes. Take a new, dry soft-tissue and remove the alcohol, dissolved sediment and dust, by rubbing gently over the surface using a small circular movement. Blow away any remaining lint with compressed air. Keysight 81950A Compact TLS module, Edition 3...
  • Page 103: How To Clean Connector Interfaces

    Clean the interface by rubbing the cotton-swab over the surface using a small circular movement. Using a new, dry pipe-cleaner, and a new, dry cotton-swab remove the alcohol, any dissolved sediment and dust. Blow away any remaining lint with compressed air. Keysight 81950A Compact TLS module, Edition 3...
  • Page 104: How To Clean Bare Fiber Adapters

    Clean the adapter by rubbing a new, dry cotton-swab over the surface using a small circular movement. Blow away any remaining lint with compressed air. Keysight 81950A Compact TLS module, Edition 3...
  • Page 105: How To Clean Instruments With A Fixed Connector Interface

    This will degrade the performance of your transmission system. Never try to open the instrument and clean the optical block by yourself, because it is easy to scratch optical components, and cause them to be misaligned. Keysight 81950A Compact TLS module, Edition 3...
  • Page 106: Additional Cleaning Information

    Take a new soft-tissue and moisten it with isopropyl alcohol. Carefully clean the bare fiber with this tissue. Make your cleave and immediately insert the fiber into your bare fiber adapter in order to protect the surface from dirt. Keysight 81950A Compact TLS module, Edition 3...
  • Page 107: Other Cleaning Hints

    Never open the instruments as they can be damaged. Opening the instruments puts you in danger of receiving an electrical shock from your device, and renders your warranty void. Keysight 81950A Compact TLS module, Edition 3...
  • Page 108 Status Bits 72 Storage 14 Front Panel Controls and Indicators 18 Tunable Laser Source 17 Typical Use Models 19 Initial Inspection 13 Input/Output Signals 14 Inspection 13 Use Models 19 Installation 17 User’s Guides 29 Keysight 81950A Compact TLS module, Edition 3...
  • Page 109 Index Keysight 81950A Compact TLS module, Edition 3...
  • Page 110 This information is subject to change without notice. © Keysight Technologies 2012, 2015 Edition 3, February 2015 www.keysight.com...