125 MHz Fiber-Optic Receivers

These 125 MHz fiber-optic receivers offer a well-balanced combination of gain, bandwidth, and low noise over the DC–125-MHz frequency range. Because of their high transimpedance gain and low noise-equivalent power (NEP), they offer the best in sensitivity for signals with rise and fall times as short as 3 ns. This high sensitivity, combined with their high-level output, reduces the effects of downstream noise sources. They have been engineered to eliminate most common sources of noise and drift, and have enough gain to pick up even very weak signals making them ideal optical front ends for systems requiring a low-noise input.

High transimpedance gain and low noise
Silicon or InGaAs versions
FC Fiber-coupled receivers
AC & DC coupled versions
Excellent RF shielding

See All Features

Description	Compatibility	Price
1801-FC 125 MHz Fiber-Optic ReceiversFiber-Optic Receiver, 320-1000 nm Silicon, 125 MHz, FC, DC-Coupled	UNIVERSAL	$1,690
1801-FC-AC 125 MHz Fiber-Optic ReceiversFiber-Optic Receiver, 320-1000 nm Silicon, 25 kHz to 125 MHz, FC, AC-Coupled	UNIVERSAL	$1,830
1811-FC 125 MHz Fiber-Optic ReceiversFiber-Optic Receiver, 900-1700 nm InGaAs, 125 MHz, FC, DC-Coupled	UNIVERSAL	$1,700
1811-FC-AC 125 MHz Fiber-Optic ReceiversFiber-Optic Receiver, 900-1700 nm InGaAs, 25 kHz to 125 MHz, FC, AC-Coupled	UNIVERSAL	$1,840

Features

Silicon or InGaAs Versions

Silicon models provide visible wavelength coverage from 320-1000 nm and use a silicon-PIN photodiode with a high-gain, low-noise transimpedance amplifier. The near-IR version uses an InGaAs-PIN photodetector that provides coverage from 900-1700 nm. These receivers will enable wide bandwidth low-noise detection of signals distributed over fiber-optic cables or found in high resolution spectroscopy, fiber-optic sensors, optical metrology and many other applications.

High Transimpedance Gain and Low Noise

Because of their high transimpedance gain and low noise-equivalent power (NEP), they offer the best in sensitivity for signals with rise and fall times as short as 3 ns. This high sensitivity, combined with their high-level output, reduces the effects of downstream noise sources.

DC Coupled Versions

With true DC coupling, these photoreceivers give linear responses to transient signals without artificial ringing, tails, or other anomalies. For applications where you need to measure both the AC modulation and the DC component, choose the DC coupled receiver.

AC Coupled Versions

AC-coupled versions with a low-frequency roll-off at 25 kHz are available. These photoreceivers are useful for measuring AC signal with a higher resolution, even when you have a large DC component, than the DC version. To make alignment easier, AC-coupled versions are equipped with an additional DC photocurrent monitor output. The monitor output has a 50-kHz bandwidth and a gain of 1 V/mA.

RF Shielding

Careful RF shielding and filtering of power-supply inputs eliminate electromagnetic interference, even in laboratories with Q-switched lasers and other noisy equipment.