Representative diagram of the experimental setup used in the study. (IMAGE)
Caption
Representative diagram of the experimental setup used in the study. The output of a quantum cascade laser (QCL) was modulated by a Stark effect external modulator and transmitted through a Herriott cell to simulate a light path with an effective length of over 30 m. Two different detectors, namely a quantum well infrared photodetector (QWIP) and a quantum cascade detector (QCD) were tested in the receiver side. Thanks to techniques such as pulse shaping and pre- and post-processing, this free-space optics communication system achieved record-setting data rates.
Credit
Figure courtesy of Pierre Didier, LTCI, Telecom Paris, Institut Polytechnique de Paris.
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