SKU: HSDT
The HSDT series High-Speed Fiber-Coupled Detectors are engineered for high-fidelity response at bandwidths exceeding 1 GHz. Unlike amplified detectors, which can distort signals, especially at high frequencies due to their amplification circuitry, the HSDT operates with a low-noise DC bias, avoiding such distortions. This makes it ideal for measuring fast signal transients, providing a linear response to incident light. The HSDT operates in photoconductive mode, using reverse bias from either an internal battery or a DC power supply, where incoming light generates a current flow. A parallel resistor can be added to convert the detector current into a voltage, maximizing response. For optimal performance, particularly due to cabling effects, a 50-ohm resistor should be used at the oscilloscope input. We offer a BNC 50-ohm dummy resistor for this purpose. For measuring laser pulses longer than 500 ns, a parallel resistor between 1k and 10k ohms is recommended.
The h signal is output through an SMA connector, allowing easy monitoring with an oscilloscope or other measurement electronics. The unit includes a built-in battery with a twist switch for convenient operation, along with a connector for an external DC power supply. An optional wall-pluggable DC power supply is also available. The HSDT detectors are ideal for test and measurement applications, including research in data communications, analog microwaves, and high-speed photonics.
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