A device and method for improving the coupling efficiency of space light-fiber array
A fiber array and coupling efficiency technology, which is applied in the field of electronic information and can solve problems such as decreased coupling efficiency
Active Publication Date: 2021-09-10
XIAN UNIV OF TECH
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[0005] The purpose of the present invention is to provide a device and method for improving the coupling efficiency of spatial light-fiber arrays, which can overcome the problem of coupling efficiency decline caused by spot jitter and drift
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[0058] In free space optical communication or lidar, the device can receive signals. For free-space optical communication systems, signal beams (such as figure 2 (shown in 1) is provided by the communication partner terminal; for lidar, the signal beam is the echo signal of the detection target. The distorted wavefront is formed after the signal beam is transmitted through the long-distance turbulent atmosphere. Distortion wavefront is figure 2 The shown spatial light-fiber array coupling device is coupled so that the spatially transmitted light beam is converted into optical fiber transmission. At the end of the array fiber, the optical fiber array can be fused and tapered or photoelectrically converted to perform signal detection and restoration.
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The invention discloses a device and a method for improving the coupling efficiency of a space light-optical fiber array. After a signal beam is transmitted through a long-distance turbulent atmosphere, a distorted wavefront is formed. The distorted wavefront is coupled by the spatial light-fiber array coupling device shown in Figure 2, so that the spatial transmission beam is converted into optical fiber transmission. At the end of the array fiber, the fusion taper or photoelectric conversion of the fiber array can be carried out, and the process of signal detection and restoration can be carried out. Combined with intelligent optimization to drive the micro-motion piezoelectric ceramic array, the center of each fiber coupling end face in the array unit is located at the focal center of the corresponding lens. , and keep the optical axis of the optical fiber and the lens coincident, further improving the coupling efficiency of the space light-fiber array.
Description
technical field [0001] The invention relates to the field of electronic information, in particular to a device and method for improving the coupling efficiency of a space light-fiber array. Background technique [0002] Wireless laser communication (Free Space Optic, FSO) communication is a wireless communication method that uses light waves as the carrier to perform high-speed data transmission in free space (atmosphere or vacuum environment). It is an extension of optical fiber communication, but it is very different from optical fiber communication: it does not need to be transmitted through optical fiber, which expands the scope of use of optical communication. Compared with traditional wireless radio frequency communication, FSO communication has the advantages of no need for spectrum license, convenient installation, security and confidentiality, and high communication rate. As an emerging communication method, its development prospects cannot be ignored in today's in...
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IPC IPC(8): G02B6/32
CPCG02B6/322
Inventor 雷思琛柯熙政吴鹏飞南友新
Owner XIAN UNIV OF TECH