A test device for optical fiber coupling efficiency in atmospheric turbulence
A technology of optical fiber coupling and atmospheric turbulence, which is applied in the direction of measuring devices, optical instrument testing, and optical performance testing, can solve problems such as not being used, and achieve the effects of simplifying the process, improving the efficiency of optical fiber coupling, and ensuring timeliness
Inactive Publication Date: 2018-05-11
CHANGCHUN UNIV OF SCI & TECH
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Problems solved by technology
At present, there is no test system that completes the test of the coupling efficiency while completing the measurement of the focal plane spot
At the same time, the research on the method of improving the coupling efficiency in turbulent flow has not been achieved by changing the focal length of the coupling lens group.
Method used
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[0014] (1) The laser 1 emits laser light, the laser light enters the atmospheric medium after passing through the beam shaping device 2, and the laser light is received by the receiving optical system 3 after being transmitted through the atmospheric medium; the laser light reaches the beam splitting prism 4 after passing through the receiving optical system 3; Finally, the outgoing laser light is divided into two beams, one beam of laser light is received by the Hartmann sensor 9, and the other beam of laser light is received by the zoom fiber coupling lens group 5; the laser beam emitted by the zoom fiber coupling lens group 5 is received by the optical fiber 6; The laser light is received by the optical power meter 7; the optical power 7 displays the current fiber coupling efficiency value.
[0015] (2) The Hartmann sensor 9 images the received laser light, and sends the recorded spot image to the computer 10, where the analysis of the energy distribution and shape distribut...
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The invention relates to an optical fiber coupling efficiency test device for the atmosphere turbulence. The device is characterized in that the transmitting terminal of a laser is aligned with a light beam shaping apparatus. The transmitting optical path of the laser passes through the light beam shaping apparatus and an atmospheric medium to be received by a receiving optical system. The output laser of the receiving optical beam is aligned with a beam splitter prism. Two laser beams are outputted by the beam splitter prism. One laser beam outputted by the beam splitter prism is aligned with the receiving terminal of a Hartmann sensor, and the other laser beam outputted by the beam splitter prism is aligned with the receiving terminal of a zoom optical fiber coupling lens group. The laser emitted by the transmitting terminal of the zoom optical fiber coupling lens group passes through an optical fiber to be received by an optical power meter. The Hartmann sensor is connected with a computer via a lead. The computer is connected with a turbulence strength tester and a control device via leads. The control device is connected with the zoom optical fiber coupling lens group via a lead. According to the technical scheme of the invention, the optical fiber coupling efficiency in the atmosphere turbulence can be measured.
Description
technical field [0001] The invention relates to a test device for optical fiber coupling efficiency in atmospheric turbulence, belonging to the technical field of space laser communication. technical background [0002] Because free-space laser communication has the advantages of large communication capacity, high transmission rate, good concealment, and strong anti-interference ability, it has broad application prospects. At present, among all laser communication links, only the inter-satellite laser communication link can completely avoid the influence of atmospheric turbulence. Turbulence will affect all aspects of the communication system, including tracking accuracy, acquisition probability, communication bit error rate, fiber coupling efficiency, etc. Therefore, it is of great significance to carry out research on the performance of communication systems in turbulent flow environments. When there is no turbulence, the fiber coupling efficiency is mainly affected by f...
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IPC IPC(8): G01M11/00G01M11/02
CPCG01M11/02G01M11/30
Inventor 赵馨宋延嵩刘云清张雷
Owner CHANGCHUN UNIV OF SCI & TECH