50 GHz Linear InGaAs PIN Photodetector, Module (PD-50-M)

Data Sheet

Product Overview

The Optilab PD-50-M is a 50 GHz bandwidth PIN receiver module designed for RF over Fiber, antenna remoting, and broadband RF transmission applications using single mode optical fiber. The PD-50-M can accept input power of up to 4 mW, utilizing a high input power, low distortion PIN photodiode that provides optical to RF conversion out to the frequency range beyond 50 GHz. This compact, cost-effective receiver module can provide users with status monitoring through the use of an on-board processor that communicates to a host computer over an RS-232 I/O interface via a standard USB 2.0 port. When the PD-50-M RF over fiber receiver module is linked with the LT series of RF over fiber transmitter modules, the combination provides an excellent solution for ultra-wideband RF to fiber conversion applications.


  • Analog RF over Fiber
  • Optically Amplified Systems
  • RZ and NRZ up to 40 Gb/s
  • LIDAR Measurements
  • Coherent Lightwave Systems
  • Front-End O/E Converter for Test Instruments
  • Satcom microwave antenna signal distribution


  • Wide bandwidth DC to 50 GHz
  • Highly Linear to 4 mW input power
  • Operating Temperature from -10°C to +50°C
  • Power and Remote Monitoring via USB port
  • Flat frequency response, ±1 dB
  • Useful Spectral Range 1200 nm -1650 nm

Feature Name Description
General Specifications
Optimized Operating Wavelength 1260 nm to 1610 nm
Optical Input Level 4 mW max.
S21 3 dB Bandwidth 50 GHz typ.
S22 Characteristics < -10 dB @ 30 GHz
Repsonsitivity 0.50 A/W @ 1550 nm typ.
Dark Current @ 25° C, 5 V 10 nA typ., 100 nA max.
Optical Return Loss -30.00 dB typ.
Optical PDL @ 1550 nm 0.2 dB max.
Optical Fiber SMF-28
Impedance 50 Ω
Bias Voltage 5 V typ.
Coupling DC Coupled
Analog Applications
Bandwidth DC to 50 GHz
Ripple over any 1 GHz ±1.0 dB max.
Group Delay ±7.0 ps
2nd Harmonics Distortion -70.0 dBc max.
3rd Harmonics Distortion -75.0 dBc max.
Link Performance with LT-20
SFDR 113 dB Hz2/3
Link Loss -25 dB @ 10 dBm Optical Input
Mechanical Specifications
Operating Temperature -10 ºC to +50 ºC
Storage Temperature -40 ºC to +80 ºC
Operating Humidity 85%
Power Supply Requirements +5 V DC, 500 mA max.
Optical Connector FC/APC, SC/APC Optional
RF Input Connector V Connector Female, 50 Ω
Local Alarm LED: Optional Input Power
Remote Alarms RS-232 Interface (Standard) via USB
Dimensions 82 mm x 60mm x 26.5 mm
Accessories Included 110 V - 240 V AC USB Adaptor & Cable
Housing Precision Mach. Anodized Aluminum

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