Nanometer wave band optical polarization system for underwater laser communication
A technology of underwater laser and laser light source, which is applied in the field of optical communication to achieve the effects of reducing light energy loss, improving laser output efficiency, and improving light receiving efficiency
Inactive Publication Date: 2022-06-03
NANJING COLLEGE OF INFORMATION TECH
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[0002] With the development of technology, underwater communication is more and more widely used. However, due to the completely different high scattering and high absorption characteristics of signal light between underwater laser communication transmission and terrestrial laser communication transmission, underwater communication is facing more challenges. Technical issues and communication efficiency issues, the existing technology has been researching and improving the efficiency of underwater communication. At present, how to improve the transmission efficiency and the signal-to-noise ratio of echo signals has become the bottleneck of underwater laser communication transmission technology.
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[0010] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.
[0011] The present invention designs a nano-wavelength optical polarization system for underwater laser communication, which is used to realize isolated transmission and reception of the emitted light and the echoed light of the target. In practical applications, such as figure 1 As shown, specific applications include 532nm laser light source, 532nm polymer zero-order half-wave plate, 532nm polarizing beam splitter prism, 532nm polymer zero-order 1 / 4 wave plate, first photodetector, second photodetector .
[0012] like figure 1 As shown, the emitting end of the 532-nanometer laser light source points to one side of the 532-nanometer polymer zero-order half-wave plate, and the 532-nanometer linear polarized light emitted by the emitting end of the 532-nanometer laser light source is directed vertically toward the 532-nanometer polym...
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The invention relates to a nano-band optical polarization system for underwater laser communication, which is designed based on a target nano-scale laser light source, a target nano-scale polymer zero-level half-wave plate, a target nano-scale polarization splitting prism, a target nano-scale polymer zero-level 1 / 4 wave plate, a first photoelectric detector and a second photoelectric detector. For realizing mutual isolation type receiving and transmitting of emitted light and echo light of a target object, in the design, part of light energy which cannot be used as signal light to penetrate through a target nanoscale polarization splitting prism originally is used as reference light to be reused, so that the laser output efficiency of the system is improved; extra laser energy loss of a system light path due to axial displacement difference between the laser emission source and the photoelectric detector is avoided, and the light receiving efficiency of the system is improved; according to the whole design scheme, the transmission efficiency of the underwater laser communication system is improved under the condition that the optical energy loss of underwater laser communication is reduced to the maximum extent.
Description
technical field [0001] The invention relates to a nano-band optical polarization system for underwater laser communication, belonging to the technical field of optical communication. Background technique [0002] With the development of technology, the application of underwater communication has become more and more extensive. However, due to the completely different high scattering and high absorption characteristics of signal light between underwater laser communication transmission and terrestrial laser communication transmission, underwater communication faces more challenges. Technical problems and communication efficiency problems, the existing technology has been researching and improving the efficiency of underwater communication. At present, how to improve the transmission efficiency and the signal-to-noise ratio of the echo signal has become the bottleneck of the underwater laser communication transmission technology. SUMMARY OF THE INVENTION [0003] The technic...
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IPC IPC(8): H04B10/80G02B27/28
CPCH04B10/80G02B27/286Y02D30/70
Inventor 曲杨于新刚张伟建许彬彬黄锦涛李景轩
Owner NANJING COLLEGE OF INFORMATION TECH