• High transimpedance gain and low noise

• Silicon or InGaAs versions

• AC coupled

• Free-space and fiber-coupled versions

• Excellent RF shielding 

For experiments requiring up to 1 GHz bandwidths and 500 ps rise times, choose the New Focus™ Model 1601-AC or 1611-AC photoreceivers. These optical photoreceivers offer a well-balanced combination of gain, bandwidth, and very low noise. Choose either a free-space, direct-illumination option or a fiber-optic input that 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.

Features

Silicon or InGaAs Versions

Silicon models provide wavelength coverage from 320-1000 nm and InGaAs models provide coverage from 900-1700 nm.

High Transimpedance Gain and Low Noise

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

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.

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.

Specifications