Modulator-based high-speed retro-modulation reflection module and reflection transmission method

Abstract

The present invention discloses a modulator-based high-speed retro-modulation reflection module and a reflection transmission method. The modulator-based high-speed retro-modulation reflection modulecomprises an optical antenna, a space-to-fiber coupling apparatus, an optical circulator, a polarization controller, a signal source, and an electro-optic modulator. An optical carrier that is received by the optical antenna from free space is coupled by the space-to-fiber coupling apparatus, and is transmitted to the electro-optic modulator; an electric signal that is sent by the signal source ismodulated, by the electro-optic modulator, to the optical carrier that comes from the space-to-fiber coupling apparatus, to generate an optical signal; the optical signal is reflected back to the space-to-fiber coupling apparatus by the optical circulator, then is coupled back to the free space by the space-to-fiber coupling apparatus, and is retro-reflected by the optical antenna in a reverse direction, so as to implement high-speed long-distance free space communication. The modulator-based high-speed retro-modulation reflection module and the reflection transmission method are used for a high-speed retro-modulation reflection-type free space laser communication system, reduce a volume and power consumption of a retro-modulation terminal device, also significantly improve a transmissionrate of an uplink signal, and meet requirements of next-generation high-speed large-capacity long-distance free space optical signal transmission.

Description

technical field [0001] The invention relates to a signal high-speed reverse modulation reflection function module and a reflection transmission method, in particular to a modulator-based high-speed reverse modulation reflection module and a reflection transmission method. Background technique [0002] With the increasing popularity of communication equipment such as mobile phones and computers and the rapid development of space information technology, people's demand for high-speed wireless information security transmission is growing rapidly. Free space optical communication technology has many potential advantages, such as high security, strong anti-interference ability, high bandwidth and high spectral utilization, etc., and has been widely used in information communication between mobile devices and base stations (aircraft, satellites and ground platforms, etc.) Transmission system. However, traditional high-precision active free-space optical systems usually have the d...

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Problems solved by technology

[0003] Existing reverse modulation schemes include frustrated total internal reflectors, liquid crystal modulators, multiple quantum well devices, and reflective semiconductor optical amplifiers. Less than the high rate (tens or even hundreds of gigabits / second) requirements of modern optical communication

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