Time Domain Fiber-Optic Detectors

For the ultimate in signal ﬁdelity, the time-domain-optimized ultra high-speed fiber-optic detectors offer 12- and 18.5-ps full-width-at-half-maximum (FWHM) impulse responses. These detectors are ideal for pulse measurements with digital high-speed oscilloscopes, and they can be used in digital communications applications where spurious ringing can degrade eye diagrams and the bit-error-rate (BER) measurement of your system. Each unit is individually tested and shipped with its own pulse- and frequency-response curves.

Minimal ringing for Time-domain applications
Ideal for pulsed laser impulse response measurements
High sensitivity with visible or near-IR input
Easy-to-use, self-contained module
Compatible with SDH and SONET ﬁlters

See All Features

Description	Compatibility	Price
1024 Time Domain Fiber-Optic DetectorsFiber-Optic Detector, Time Domain, 500-1630 nm, 12 ps, FC Singlemode	UNIVERSAL	$5,400
1444 Time Domain Fiber-Optic DetectorsFiber-Optic Detector, Time Domain, 500-1630 nm, 18.5 ps, FC Singlemode	UNIVERSAL	$5,790
1444-50 Time Domain Fiber-Optic DetectorsFiber-Optic Detector, Time Domain, 850-1630 nm, 18.5 ps, FC Multimode	UNIVERSAL	$5,760

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.

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.

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

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.

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

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.