850 MHz/1 GHz AC Coupled Optical Receivers

For experiments requiring up to 850 MHz (1611) and 1 GHz (1601) bandwidths and 500 ps rise times we recommend these optical receivers with a well-balanced combination of gain, bandwidth, and very low noise. These free-space, direct-illumination photoreceivers 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
3 dB bandwidth of 30 kHz to 850 MHz (1611) and 1 GHz (1601)
Silicon or InGaAs free space detectors
AC coupled
Excellent RF shielding

See All Features

	Compare	Description	Compatibility	Drawings, CAD & Specs	Wavelength Range	Maximum Conversion Gain	Peak Responsivity	NEP	Saturation Power	Avail.	Price
		1601FS-AC 1 GHz Optical Receivers Free Space Optical Receiver, 320-1000 nm Silicon, 30 kHz to 1 GHz, AC-Coupled	UNIVERSAL		320-1000 nm	350 V/W	0.5 A/W	31 pW/√Hz	2 mW		$1,570
		1611FS-AC 1 GHz Optical Receivers Free Space Optical Receiver, 900-1700 nm InGaAs, 30 kHz to 850 MHz, AC-Coupled	UNIVERSAL		900-1700 nm	700 V/W	1.0 A/W	20 pW/√Hz	1 mW		$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.