For those applications requiring fast time resolution, we offer time-domain-optimized high-speed photoreceivers with a guaranteed 18.5-ps full-width-at-half-maximum (FWHM) impulse response. Models 1444 and 1454 provide clean, fast impulse responses with minimal ringing, making them ideal for time-domain applications and short-pulsed-laser measurements. Or use them in high-speed digital fiber-optic communications systems, including standardized bit-error-rate (BER) testing and the characterization of modulators and other components. The compact packaging of these photodetectors makes them useful in laboratory investigations of data communications systems. For your convenience, they are battery-powered, with their own bias circuits and photocurrent monitors. And these photodetectors are internally terminated at 50 Ω so you won’t need to use a 6-dB attenuator to achieve a good impedance match with SDH and SONET filters.
Each photodetector is individually tested and shipped with its own pulse- and frequency-response curves. If your application requires a flat frequency response, you may want to look at our popular Models 141X and 143X 25-GHz photodetectors.
For an even faster time-domain-optimized photodetector, consider our 12-ps photodetectors.
Applications
- Characterizing the frequency response of pulsed lasers, modulators, transmitters, and other lightwave components
- Microwave generation/heterodyne experiments
- Characterizing pulse propagation through dispersive optical systems
This impulse response, typical of the Models 1444 and 1454 , was measured with a 50-GHz scope and a 150-fs full-width-at-half-maximum input pulse at 1.06 µm.
Typical responsivity of the Model 1444 and Model 1454 .
Typical frequency response of the Model 1444 and Model 1454 . Input power was 1 mW at 1.06 µm. Measurement accuracy is ±1.5 dB up to 25 GHz.
