Hamamatsu Photonics says that its new G8931-04 InGaAs APD receiver offers higher sensitivity than conventional InGaAs PIN photodiodes. The device features very high speed of typically 4 GHz and when combined with its very high sensitivity, the receiver is ideally suited for long distance optical communications applications.
At telecoms wavelengths of 1310 nm and 1550 nm, the InGaAs diode has typical photosensitivity of >0,8 A/W, and can operate with an avalanche gain of ≥10, thus giving an output of at least 8 A/W. The device has extremely low capacitance (typically 0,35 pF) thus enabling operation with industry standard IC chips and simplifying high-speed circuit design.
The device can be supplied with a fibre-optic pigtail, or it can be supplied with standard fibre connector types to meet customer requirements, for example SC/SPC, FC/SPC, etc. Its characteristics also make it a suitable device for other applications such as range finding, OTDR, test equipment and low light level analytical infrared measurements.
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