SKU: HSDT
The HSDT series High-Speed Fiber-Coupled Detectors features high fidelity response at high bandwidth >GHz, as well as a large dynamic range. Biased detectors are the preferred method to measure a signal’s fast transit characters, avoiding distortions caused by amplification circuitry. The HSDT free-space detectors produce a linear response to the incident light. Choices of flat detector window and ball lensed window are available. Being reverse-biased with an internal battery, the HSDT is operated in a photoconductive mode in which an input light generates a current flow. The high bandwidth signal is output through an SMA connector for monitoring with an oscilloscope or other measurement electronics. Since the signal is not amplified, a parallel resistor to the output that converts the detector current to an output voltage can maximize the response frequency. The smaller the parallel resistance at the output end is, the higher the peak power of the incident optical signal is required. The HSDT has a 100k parallel resistance built-in to reduce the background noise. For measurement 300MHz, a 50‑ohm resistor is required to terminate parallelly at the oscilloscope input. To measure >500ns laser pulse, the detector output needs 1k-10k ohm resistance in parallel.
The HSDT detectors are designed for test or measurement applications, including research in the fields of data communications, analog microwaves, and general high-speed photonics. A wall-pluggable DC power supply is an available option.
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