Space laser-to-optical fiber coupling device with ultra-large field angle and application method of space laser-to-optical fiber coupling device
A coupling device and field of view technology, applied in the field of space laser-to-fiber coupling devices, can solve the problem that the condensing lens is difficult to meet the actual application requirements, and achieve the effect of maintaining the coupling
Active Publication Date: 2021-05-07
ZHEJIANG UNIV
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Problems solved by technology
Therefore, in the case of using a high-speed optical detector with an optical fiber interface and the position of the receiving end changes, the traditional converging lens or concave mirror is difficult to meet the actual application requirements
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[0025] The present invention will be further elaborated below in conjunction with the accompanying drawings and embodiments.
[0026] A coupling device for a super-large viewing angle space laser to an optical fiber, such as figure 1 shown. The incident light enters from the first two-dimensional adjustable mirror 3 on the rotating platform 4, then passes through the filter 5 and the first beam splitter 6, and 10% of the energy passes through the first imaging lens 2, and then passes through the first photodetector A light spot is formed on module 1. 90% of the energy passes through the second two-dimensional tunable mirror 7, such as figure 2 As shown, it enters the second beam splitter 13. 10% of the energy passes through the second imaging lens 10 to form a light spot on the second photodetection module 9. The remaining 90% of the energy is coupled into the fiber optic transceiver module or (detector) 12 by the fiber coupling lens.
[0027] The rotor of the rotating pl...
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The invention discloses a space laser-to-optical fiber coupling device with an ultra-large field angle and an application method thereof. The device comprises a rotating platform, two two-dimensional adjusting reflectors, two photoelectric detection modules, two beam splitters, a controller and a plurality of lenses. The space laser at a specific angle is converted into laser which is emitted to the center of the rotating platform and is parallel to the rotating platform through a two-dimensional adjustable reflecting mirror on the side edge of the rotating platform; incident laser is converted into laser parallel to a rotating shaft through a two-dimensional adjustable reflecting mirror in the center of the rotating platform, and the laser is coupled into an optical fiber receiving and transmitting module or a detector. According to the invention, the two two-dimensional adjustable reflectors are fed back and adjusted according to the real-time position of the light spot in the photoelectric detection module, so that when the included angle between the space laser and the rotation plane changes within the range of + / -90 degrees, the coupling of the space laser and the optical fiber transceiver module or the detector is kept in real time.
Description
technical field [0001] The invention relates to a space laser-to-fiber coupling device with a super-large viewing angle and an application method. Background technique [0002] With the vigorous development of wireless communication, space optical communication has gradually been applied in underwater optical communication and indoor visible light communication due to its advantages of high frequency band, strong confidentiality, and high speed. However, due to the short wavelength of the carrier wave, strong directivity, and small divergence angle in space optical communication, high requirements are placed on the viewing angle of the receiving device. Especially for indoor visible light communication, the relative positions of the receiving and transmitting parties will change in real time, so the receiving device needs to have a large field of view and be able to continuously receive optical signals in different positions. However, high-speed optical detectors often use ...
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IPC IPC(8): H04B10/11H04B10/40
CPCH04B10/11H04B10/40
Inventor 黄强盛何赛灵
Owner ZHEJIANG UNIV