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Summary of Contents for Newport 1580-A
- Page 1 U S E R ’ S G U I D E High-Speed Receivers Models 1580-A, 1544-A, 1580-B, 1544-B, 1484-A-50, and 1474-A High-Speed Detectors Models 1414, 1014, 1444, and 1024 phone: (877) 835-9620 e-mail: tech@newport.com • www.newport.com...
- Page 2 Warranty Newport Corporation 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. Information in this document is subject to change without notice.
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Page 3: Table Of Contents
Contents Operation Introduction ..........5 Photoreceivers (Amplified Photodiodes) . -
Page 5: Operation
Operation Introduction High-speed and ultrahigh-speed measurements of optical waveforms are easy with the Newport, formerly New Focus, photoreceiver/photodetector modules. These modules convert optical signals to electrical signals and can be used to provide every high-speed/high-frequency instrument in your lab an optical input. The small size of the modules allows you to connect them directly to your test instrument, amplifier if needed, or another high-speed component. -
Page 6: Photodetectors (Unamplified Photodiodes)
AC component at the output of an AC-coupled high-speed transimpedance amplifier. The gain of the DC path is set equal to that of the AC path and temperature compensated so that extinction ratios may be accurately measured. Photodetectors (Unamplified Photodiodes) Frequency Domain Optimized Applications that rely on transmitting signals at RF and microwave frequencies benefit from detectors with flat... -
Page 7: Mechanical/Optical Description
PIN photodiode. In modules with a battery, the fiber is protected by a sheet metal flange to prevent damage while replacing the battery. Newport offers several photodetectors and photoreceivers, allowing you to match the wavelength, bandwidth, and fiber type of your application. - Page 8 (output =1 mV/µA) power switch Figure 2: Models 1580-A, 1544-A, Batt 1544-A-50 Bias Monitor Optical Input fiber-optic input connector (FC) battery-check button bias-monitor port (output =1 mV/µA) Figure 3: power Models 1414, switch 1414-50, 1014,...
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Page 9: Handling Precautions
Output K-Connector 2.26 2.00 (57.5) (50.8) Figure 5: Side and back view. (Note that the battery operated 2.00 (50.8) 1.59 modules will (40.3) not have the power connector on the side.) Power Connector (13.6) 3.15 (80.1) Handling Precautions The detector is sensitive to electrostatic discharges and could be permanently damaged if subjected to even to small discharges. -
Page 10: Powering And Connecting The Photodector/Photoreceiver
Powering and Connecting the Photoreceiver / Photodetector Connecting the Power Supply and Bias Monitor 1. Prior to handling the detector, ground yourself with a grounding strap to prevent electrostatic damage to the module. 2. Connect the power cable to your disabled power supply. Two power cables were included with the receiver;... -
Page 11: Battery Check For Units With Internal Batteries
connect to the module have compatible connectors. See “Appendix: Microwave Connectors”. 4. After connecting to the supply, enable or turn on the supply. While the module can handle any power-on sequence, it is recommended that both positive and negative be turned on together. 5. -
Page 12: Connecting The Optical Input To The Receiver
If you have the multimode “-50” model, use 50/125-μm graded index fiber. If you have model 1580-A, or 1580-B use 62.5/125-μm graded index fiber. 1. Before connecting to the photoreceiver, verify the power in the fiber is within the safe operating range. -
Page 13: Troubleshooting
See “Checking the Dark Voltage, ” below. A damaged photodiode must be replaced by Newport. If the dark voltage is okay, then the problem is most likely a damaged amplifier and the module must be repaired by... -
Page 14: Checking The Dark Voltage
This voltage is the dark voltage. 3. If the dark voltage is >10 mV, then the photodiode may be damaged and may need to be repaired by Newport . It is possible the module will still operate well with a voltage only somewhat higher than 10 mV. -
Page 15: Basic Optical Test
(A/W) found on the datasheet shipped with the unit and G is the Bias Monitor’s transimpedance gain, 1 V/mA. If the measured voltage is substantially less than expected, the module may need to be returned to Newport for repair. -
Page 16: Specifications Table
Specifications 12-GHz Optical Photoreceivers ............1580-A, 1544-A ..........Table 1 12-GHz DC-coupled Photoreceivers ..........1580-B, 1544-B ..........Table 2 22-GHz Photoreceivers ..................1484-A-50 ...........Table 3 38-GHz Photoreceivers ..................1474-A ............Table 3 25-GHz Photodetectors ..................1414 ............Table 4 45-GHz Photodetectors ..................1014 ............Table 5 18-ps Photodetectors ....................1444 ............Table 6 12-ps Photodetector .................... - Page 17 12-GHz Fiber Optic Photoreceivers Model 1580-A 1544-A 1544-A-50 Wavelength Range 780-870 500-1630 780-1630 Bandwidth, 3-dB, 12 / 10.5 12 / 10.5 12 / 10.5 typ / min Low-Frequency Cutoff Risetime, 10-90% Conversion Gain -550 / -450 -900 / -800 -800 / -700...
- Page 18 12-GHz DC-coupled Photoreceivers Model 1580-B 1544-B 1544-B-50 Wavelength Range 780-870 500-1630 780-1630 Bandwidth, 3-dB DC to DC to DC to (DC coupled) , typ / 12 / 10.5 12 / 10.5 12 / 10.5 Low-Frequency Cutoff (AC coupled) Risetime, 10-90% Conversion Gain -550 / -450 -900 / -800...
- Page 19 22 and 38-GHz Photoreceivers Model 1484-A-50 1474-A Wavelength Range 800-865 630-1620 Bandwidth, 3-dB, 22/20 38/35 typ / min Low-Frequency Cutoff Risetime, 10-90% 16.5 12.5 Conversion Gain , typ / -75 / -65 -75 / -65 pW/rt(Hz) Output Noise μVrms Output Voltage -0.6 -0.6 Maximum Safe Input,...
- Page 20 25-GHz Photodetectors Model 1414 1414-50 Wavelength Range 500-1630 850-1630 Bandwidth, 3-dB, typ/min Risetime, 10-90% Conversion Gain typ/min 17/15 14/12 Responsivity Saturation Power Maximum Safe Input, Output Impedance Bias-Monitor Gain V/mA Bias-Monitor Bandwidth Bias-Monitor Output Impedance Internal 9-V Internal Power Requirements Battery 9-V Battery Detector Type...
- Page 21 45-GHz Photodetectors Model 1014 Wavelength Range 500-1630 Bandwidth, 3-dB, typ/min 45 / 40 Risetime, 10-90% Conversion Gain typ/min 11/9 Peak Responsivity 0.45 Saturation Power Maximum Safe Input Output Impedance Bias-Monitor Gain V/mA Bias-Monitor Bandwidth Bias-Monitor Output Impedance Internal 9-V Power Requirements Battery Detector Type InGaAs...
- Page 22 12- and 18.5-ps Photodetectors Model 1444 1444-50 1024 Wavelength Range 500-1630 850-1630 500-1630 FWHM, Impulse 16.5/18.5 16.5/18.5 11/12 Response typ/max Bandwidth, 3-dB, Conversion Gain 17/15 14/12 11/9 typ/min Responsivity 0.45 Saturation Power Maximum Safe Input, Output Impedance Bias-Monitor Gain Bias-Monitor Bandwidth Bias-Monitor Output Impedance...
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Page 23: Customer Service
Customer Service Technical Support Information and advice about the operation of any Newport product is availabe from our applications engineers. For quickest response, ask for “Technical Support” and know the model number and serial number for your product. Hours: 8:00–5:00 PST, Monday through Friday (excluding holidays). -
Page 24: Appendices
For more information please see the Optical Measurement section in the Application Notes selection guide on the Newport webpage. In particular, Application Note 1: Insights into High-Speed Detectors and High Frequency Techniques. Connector Type... -
Page 25: 2: Replacing The Battery
Appendix 2: Replacing the Battery 1. Turn off the module and remove the two screws on the back panel with a Phillips screwdriver. 2. Remove the back panel and replace the battery. 3. Replace the back panel. 4. Check the battery level as described above in the “Battery Check”... - Page 26 –0.2 –0.4 Time Figure 8. Time-Domain Optimized: This is the impulse response of a detector that is optimized for the time domain. You can see the characteristic frequency response in the figure above. –0.2 –0.4 Time Figure 9. Frequency-Domain Optimized: This is the impulse response of a detector that is optimized for a flat frequency response.
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Page 27: 4: Dc-Coupled Photoreceivers Crossover Region
Appendix 4: DC-coupled Photoreceivers Crossover Region In looking at the frequency response of the DC-coupled receivers, a “crossover” region exists where the DC response rolls off and the AC response rises. In this region, near 25kHz, the response is not flat. Signals with significant energy in this region will be somewhat distorted.
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