Pyro-electric laser power detector QS2-H

high-power

BROAD SPECTRAL RESPONSE From 0.1 to 1000 µm 4 FAMILIES OF PRODUCTS TO CHOOSE FROM: • QS-L: discrete pyro detectors, low noise level • QS-H: discrete pyro detectors, high average power • QS-IF: hybrid pyro detectors, current mode, fast response • QS-IL: hybrid pyro detectors, current mode, low noise level EASY TO INTEGRATE FORMAT TO5 and TO8 packages make the QS-H detectors small and easy to integrate in an existing system. LARGE AREA SENSORS 5 mm and 9 mm diameter pyroelectric sensors make optical alignment easier. SEVERAL IR WINDOWS IN OPTION • Quartz: 0.2 – 3.5 µm • Barium fluoride: 0.2 – 17.5 µm • Sapphire: 0.1 – 7.0 µm • Silicon: 1.2 – 9.0 µm and 22 – 100 µm • AR germanium: 1.8 – 23 µm (10.6 µm peak) PYROELECTRIC THERMAL DETECTORS Our pyroelectric detectors are a class of room temperature thermal detectors that produce a current output that is directly proportional to the rate of change of temperature when exposed to a source of radiation. They are best described by an AC current source, capacitor and resistor. Their current output is governed by the equation I = p(T)·A·dT/dt, where I is current, p(T) is the pyro coefficient, A is the area as defined by the front electrode, and dT/dt is the rate of temperature change of the pyro crystal. The advantages of a pyroelectric detector over other IR detectors are: room temperature operation, broad spectral response, high sensitivity (D*) and fast response (sub-nsec into 50 Ω).