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A comparison between the photodetection characteristics of an FP laser amplifier under AM and FM formats is reported. A 450 MHz photodetection bandwidth is obtained under the AM format using a Fabry-Perot laser amplifier, with two antireflection coated facets with 10−5 reflectivity. Using an FP laser amplifier with 10−3 reflectivity as an FM discriminator/photodetector, a photodetection bandwidth of up to 2.6 GHz was measured.
Inspec keywords: amplitude modulation; infrared detectors; optical receivers; semiconductor lasers; reflectivity; optical modulation; frequency modulation; photodetectors
Other keywords:
Subjects: Photodetectors; Lasing action in semiconductors; Laser beam modulation, pulsing and switching; mode locking and tuning; Detection of radiation (bolometers, photoelectric cells, i.r. and submillimetre waves detection); Semiconductor lasers; Optical communication; Optical communication devices, equipment and systems