For the ultimate in signal fidelity, the Model 1024 time-domain-optimized ultrahigh-speed photodetector offers 12 ps full-width-at-half-maximum (FWHM) impulse responses. These photodetectors are ideal for time-domain applications in high-speed digital fiber-optic communications systems, including bit-error-rate (BER) testing and characterizing modulators and other components.
These self-contained photodetector modules are powered by a user-replaceable 9-V battery. 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.
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. And these photodetectors are internally terminated at 50 Ω, so they don’t require a 6-dB attenuator when used with microwave 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 45-GHz photodetectors.
Predicted and typical responsivity of the photodetector in the Model 1024 .
Impulse response of the Model 1024 measured with a 50-GHz scope and a 150-fs full-width-at-half-maximum input pulse at 1.06 µm.
Typical frequency response of Model 1024 . 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.
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
