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New Focus 1444 User Manual

Fiber-coupled, ultrahigh-speed photodetector modules
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• FAST SHIPPING AND
DELIVERY
• TENS OF THOUSANDS OF
IN-STOCK ITEMS
• EQUIPMENT DEMOS
• HUNDREDS OF
MANUFACTURERS
SUPPORTED
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RENTALS
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SECURE ASSET SOLUTIONS
Artisan Technology Group
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SERVICE CENTER REPAIRS
Experienced engineers and technicians on staff
at our full-service, in-house repair center
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Sell your excess, underutilized, and idle used equipment
We also offer credit for buy-backs and trade-ins
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Summary of Contents for New Focus 1444

  • Page 1 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...
  • Page 2 Models 141X, 143X, 144X & 145X F I B E R - C O U P L E D , U L T R A H I G H - S P E E D P H O T O D E T E C T O R M O D U L E S USER’S MANUAL Artisan Technology Group - Quality Instrumentation ...

  • Page 3: Table Of Contents

    MICROWAVE CONNECTOR........11 APPENDIX 3: INSIDE THE PHOTODETECTOR MODULE ..12 TROUBLESHOOTING................13 DETECTOR CHARACTERISTICS ............16 WARRANTY, SERVICE & SUPPORT ..........18 Is a registered trademark of New Focus, Inc. 141522 Rev.D Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 4: Handling Precautions

    HANDLING PRECAUTIONS The detector is sensitive to electrostatic discharges and could be permanently damaged if subjected even to small discharges. Prior to handling, or making connections, be sure to ground yourself adequately. A ground strap provides the most effective grounding and minimizes the likelihood of electrostatic discharge.

  • Page 5: Quick Start

    QUICK START (Perform steps 4, 5 and 6 if using the detector for the first time or you wish to check the battery and DC offset.) 4. Connect a voltmeter to the “Bias Monitor” SMA connector. 5. Press “Batt Chk” button. The voltage should be at least 3.5 V. 6.

  • Page 6: Introduction

    New Focus offers a total of eight models, allowing you to match your wavelength of interest and the connector style of your instru- mentation. The Models 141X and 144X are high-speed InGaAs...

  • Page 7: Operation

    OPERATION Checking the battery and offset voltage: The battery and offset voltage should be checked regularly to ensure proper functioning of the detector. 1. Turn on the module using the power switch. 2. Connect the “Bias Monitor” port to a voltmeter. 3.
  • Page 8 OPERATION 1. If you do not currently have an ST- or FC-terminated optical fiber, use either a pigtail assembly or a fiber collimator (see Table 1), and align the fiber so that light exits the output fiber connector. With a pigtail assembly, use a fiber aligner such as the Model 9091 and its accessories;...
  • Page 9 Patch Cable 1.1 to 1.6 µm wavelength Model 1222 ST-FC (2 meters) These assemblies are available from New Focus. Collimators require an Opti-Claw tilt-mount such as the Model 9854. Pigtail assemblies require a fiber aligner such as the Model 9091.
  • Page 10 APPENDICES Replacing the battery: 1. Turn off the module and remove the two screws on the back panel with a Phillips screwdriver. (See Fig. 1.) 2. Remove the back panel and replace the battery. 3. Replace the back panel. 4. Check the battery level as described above. Fig.

  • Page 11: Appendix 1: Using An Optical Fiber

    APPENDICES APPENDIX 1: USING AN OPTICAL FIBER Single mode optical fiber can provide low loss and low distortion if attention is paid to a few important details. First, if more than one mode is allowed to propagate in a step-index fiber, the bandwidth will be degraded to approximately ƒ...

  • Page 12: Appendix 2: Using The Correct

    DC-55 GHz Wiltron V Wiltron V DC-65 GHz 2.4 mm New Focus also offers the following products: Model 1224 Female-V to Male-K Model 1225 Male-SMA to Female-BNC Model 1226 Female-SMA to Male-BNC Model 1227 40-GHz Flex Cable, Female-K to Male-K...

  • Page 13: Appendix 3: Inside The Photodetector Module

    APPENDICES APPENDIX 3: INSIDE THE PHOTODETECTOR MODULE Inside the photodetector module is a gold-plated microwave housing that contains the high-frequency circuitry. This housing is bolted to a printed-circuit board which regulates the bias for the photodiode and amplifies the DC photocurrent for the monitor port.

  • Page 14: Troubleshooting

    DC offset plus dark current. If the output is >10 mV, then the detector is probably damaged and will need to be returned to New Focus. Checking the Battery 1. Turn on the module using the power switch.
  • Page 15 TROUBLESHOOTING Replacing the Battery 1. Turn off the module and remove the two screws on the back panel with a Phillips screwdriver. (See Fig. 1.) 2. Remove the back panel and replace the battery. 3. Replace the back panel. 4. Check the battery level as described above. Basic Optical Test To quickly test whether a photodetector appears to be working, you can perform a simple DC optical test:...
  • Page 16 TROUBLESHOOTING sent into the detector will produce little or no output voltage. Note also that if the fiber types are not compatible (single-mode with multi-mode, and vice-versa), this can also be the cause of a very low output voltage. To clean the fiber: 1.

  • Page 17: Detector Characteristics

    DETECTOR CHARACTERISTICS Model # 1411(1414) 1431(1434) 1441(1444) 1451(1454) 950-1650 nm 400-1650 nm 950-1650 nm 400-1650 nm Wavelength Range 950-1650 nm 550-1330 nm 950-1650 nm 550-1330 nm (multimode versions) Max. Full Width at • • 18.5 ps 18.5 ps Half Maximum Min.
  • Page 18 DETECTOR CHARACTERISTICS Fig 3. Responsivity vs. wavelength for a) Models 143X and145X and b) Models 141X and 144X. Responsivity increases from 0–0.52 A/W over the range of 950–970 nm. 1100 1500 1700 1300 Wavelength, nm Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com...

  • Page 19: Warranty, Service & Support

    WARRANTY, SERVICE & SUPPORT New Focus, Inc. guarantees its products to be free of defects for one year from the date of shipment. This is in lieu of all other guarantees, expressed or implied, and does not cover incidental or consequential loss.
  • Page 20 Artisan Technology Group is your source for quality new and certified-used/pre-owned equipment SERVICE CENTER REPAIRS WE BUY USED EQUIPMENT • FAST SHIPPING AND DELIVERY Experienced engineers and technicians on staff Sell your excess, underutilized, and idle used equipment at our full-service, in-house repair center We also offer credit for buy-backs and trade-ins •...

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