9 June 1992 10.6-μm laser heterodyne system with acousto-optic frequency modulation
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A 10.6-micron laser heterodyne receiving system with acoustooptic frequency modulation is described. In this system, the first-order diffraction beams are used as the optical signal modulation beam in the transmitting optical terminal, a 77 K-PV-HgCdTe detector is used as heterodyne reception device in the receiving optical teminal, and the Stark cells are used in the transmission and reception terminals in order to stabilize the frequencies of local and signal laser. With the application of frequency shift key digital modulation, the terminal bit error rate is better than 10 exp -8.
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Yu Hu, Guangmin Cheng, Xian Li, Yong Zhu, Guangyong Zheng, Changgen Cheng, Minchun Li, Wang Kai, "10.6-μm laser heterodyne system with acousto-optic frequency modulation", Proc. SPIE 1635, Free-Space Laser Communication Technologies IV, (9 June 1992); doi: 10.1117/12.59270; https://doi.org/10.1117/12.59270

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