Novick, Kim & Lee, PLLC
Phase-lock-free system and method for receiving multi-modulation-format compatible high-speed laser signal
A phase-lock-free system includes a control instruction unit, a low-noise high-gain optical amplifier, an optical switch, a filter, an optical delay interferometer I, an optical delay interferometer Q, a first balanced detector, a second balanced detector, an anti-coding switch unit, a parallel-serial conversion unit, and a data processing unit. The control instruction unit is connected to the optical switch, the anti-coding switch unit, and the parallel-serial conversion unit, respectively; the low-noise high-gain optical amplifier is connected to the optical switch; the optical switch is connected to the first balanced detector and the second balanced detector by means of the filter, the optical delay interferometer I, and the optical delay interferometer Q, respectively. This system improves the compatibility of a communication system at a relay node in an existing laser communication network.
XI'AN INSTITUTE OF OPTICS AND PRECISION MECHANICS, CHINESE ACADEMY OF SCIENCES
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Wei Xiaoping Hui Duorui Xinning Yulong Tao
Wang Xie Hu Gao Huang Su Duan