Specifications

  • Detector Material
    InGaAs
  • Responsivity
    1024: 0.45 A/W
    1444: 0.7 A/W
    1444-50: 0.6 A/W
  • Fiber-Optic Connector
    FC/UPC
  • NEP
    1024: 45 pW/√Hz
    1444: 30 pW/√Hz
  • Saturation Power
    2 mW
  • Output Connector
    Anritsu K
  • Output Impedance
    50 Ω
  • DC Bias Monitor Bandwidth
    50 kHz
  • DC Bias Monitor Transimpedance Gain
    1 V/mA
  • Power Requirements
    Internal 9-V battery

Features

Minimal Ringing for Time-domain Applications

With clean, fast impulse responses with minimal ringing, these photodetectors are ideal for time-domain applications in high-speed digital fiber-optic communications systems including BER testing, characterizing modulators and other components, and short-pulsed-laser measurements. For frequency-domain applications, please see our 45 GHz or 25 GHz Fiber-Optic Detectors which provide a flat frequency response over wide bandwidths.

Model 1024 Impulse Response
Measured with a 50-GHz scope and a 150-fs full-width-at-half-maximum input pulse at 1.55 µm.

Model 1444 Impulse Response
Measured with a 50-GHz scope and a 150-fs full-width-at-half-maximum input pulse at 1.55 µm.

High Sensitivity to Visible or NIR

Our Time Domain Photodetectors utilize a InGaAs diode providing wavelength coverage from 500 to 1630 nm for single mode and 850 to 1630 nm for multimode fiber.

Model 1024 Responsivity

Model 1444 Responsivity

Model 1024 Frequency Response
Input power was 0.5 mW at 1.06 µm. Measurement accuracy is ±1.5 dB up to 40 GHz and ±3.5 dB from 40 to 50 GHz.

Model 1444 Frequency Response
Input power was 1 mW at 1.06 µm. Measurement accuracy is ±1.5 dB up to 25 GHz.

Easy-to-use, Self-contained Module

The compact, self-contained packaging of these photodetectors powered by a user-replaceable 9-V battery makes them useful in laboratory investigations of data communications systems. The photodiode bias circuit and battery are built into the RF-shielded case, reducing the risk of damage from excessive voltage or rough handling, and eliminating the need for expensive bias tees. All these photodetectors also come equipped with a DC-bias monitor that has a transimpedance gain of 1 mV/µA in a 50-kHz bandwidth.

Compatible With SDH and SONET Filters

Because of their optical-fiber input, these photodetectors can be connected directly to electronic instruments, eliminating the need for expensive and lossy high-frequency microwave cables. For your convenience, these photodetectors are internally terminated at 50 Ω, so they don’t require a 6-dB attenuator to achieve a good impedance match with SDH and SONET filters or when used with microwave filters.

Applications

  • Direct temporal proile measurements of nsec pulsed lasers for marking and machining applications 
  • Characterizing the frequency response of pulsed lasers, modulators & transmitters
  • Microwave generation - heterodyne experiments
  • Characterizing pulse propagation through dispersive optical systems

Resources

CompareModelDrawings, CAD & Specs Wavelength Range 3 dB Bandwidth Maximum Conversion Gain Fiber Type Availability Price
mgctlbxN$MZP mgctlbxV$5.3.2 mgctlbxL$C