850 MHz/1 GHz AC Coupled Fiber-Optic Receivers

For experiments requiring up to 850 MHz (Model 1611) and 1 GHz (Model 1601) bandwidths and 500 ps rise times we recommend these fiber-optic receivers with a well-balanced combination of gain, bandwidth, and very low noise. The ﬁber-optic input works equally well with FC/PC-connectorized single-mode or multimode ﬁber. 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
30 kHz to 850 MHz (1611) and 1 GHz (1601) 3 dB bandwidth
Silicon or InGaAs versions
AC coupled, capable of driving up to 1 V peak-to-peak into a 50-Ω load
Excellent RF shielding

See All Features

	Compare	Description	Compatibility	Drawings, CAD & Specs	Avail.	Price
		1601FC-AC 1 GHz Fiber-Optic ReceiversFiber-Optic Receiver, 320-1000 nm Silicon, 30 kHz to 1 GHz, FC/PC, AC-Coupled	UNIVERSAL			$1,570
		1611FC-AC 1 GHz Fiber-Optic ReceiversFiber-Optic Receiver, 900-1700 nm InGaAs, 30 kHz to 850 MHz, FC/PC, AC-Coupled	UNIVERSAL			$1,570

Features

Silicon or InGaAs Versions

The Silicon model (1601) provides wavelength coverage from 320-1000 nm, and the InGaAs model (1611) provides coverage from 900-1700 nm. This enables 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 0.5 ns. This high sensitivity, combined with their high-level output, reduces the effects of downstream noise sources.

Typical frequency response of the 1601-AC (blue) and the 1611-AC (black).

AC Coupled

These photoreceivers are AC-coupled with a low-frequency roll-off at 30 kHz. A convenient DC-photocurrent monitor output makes alignment easy. The monitor output has a 20-kHz bandwidth and a transimpedance gain of 10 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.