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Column: Laser Insight
January 2003
Last month, we took a quick look at some different photosensors and their relative usefulness when applied to the detection of high-speed optical pulses. Some of the disadvantages with light-dependent resistors (LDRs) and photovoltaic-type semiconductor sensors were pointed out. The photoconductive-type diodes are generally accepted as being probably the best (in terms of speed, anyway) among the laser industry. Photoconductive diodes can be made very small...