Off-axis reflective optical antenna and system

Abstract

The invention relates to an off-axis reflective optical antenna comprising a housing, an off-axis parabolic mirror arranged inside the housing, and a fiber interface arranged at one end of the housing. The fiber interface is arranged at a focal point of the off-axis parabolic mirror; and the fiber interface is used for transmitting or receiving signal light and then carrying out transmission. Compared with the prior art, the off-axis reflective optical antenna has the following advantages: a few of devices are used by the antenna; the fiber interface is arranged at the focal point of the off-axis parabolic mirror directly, so that installation and debugging becomes simple and convenient; with the off-axis parabolic mirror and the off-axis collimating and coupling way, the coupling efficiency is high; and the antenna has the same optical path for light of different wave bands, so that the adverse effect on the alignment debugging by the chromatic aberration of different wavelengths can be avoided.

Description

technical field [0001] The invention belongs to the technical field of space laser communication, and in particular relates to an off-axis reflective optical antenna and system. Background technique [0002] In the laser communication system, the transceiver terminal used for space optical communication must align the transceiver terminal before starting laser communication, and this alignment requires high precision. The existing space optical communication optical antenna is generally a transmissive optical lens system. This optical antenna uses the principle that parallel light converges through the lens. However, the laser wavelength generally used for communication is invisible light with a wavelength of 1550nm or 1310nm. The alignment adjustment work at both ends of the communication system brings great difficulties. Therefore, the best solution at present is to first use lasers in the visible light band for system alignment, and then use non-visible light to realize l...

AI Technical Summary

Problems solved by technology

Traditional lens-type optical antennas, due to the chromatic aberration between the communication laser and the alignment laser, even if the alignment is achieved using the alignment laser, the coupling efficiency of the optical fiber at the receiving end will still be reduced, and the extracted optical signal will be weak, which cannot meet the requirements of the system. Requirements

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