Polarization demultiplexing device, polarization multiplexing light communication system and implementation method
A polarization demultiplexing and polarization multiplexing technology, applied in the field of optical communication systems, can solve the problems of polarization channel crosstalk, high control difficulty of polarization multiplexing optical communication system, low response efficiency, etc., to eliminate crosstalk between polarization channels, simplify the structure, the effect of improving response efficiency
Active Publication Date: 2013-11-06
WUHAN POST & TELECOMM RES INST CO LTD
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Problems solved by technology
[0019] The technical problem to be solved by the present invention is to solve the problems of high control difficulty, low response efficiency, and prone to polarization channel crosstalk in polarization multiplexing optical communication systems
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Embodiment 2
[0045] The working principle of Embodiment 2 is as follows: Let the received polarization multiplexing signal be Input, the Input signal includes the signals of the first and second polarized channels, and the QWP changes the Input signal with any polarization state into a linearly polarized optical signal, The output of the QWP is divided into two channels B1 and B2, which can be realized by a 1:2 optical splitter. B1 enters the HWPA to change the polarization direction of the signal. The output C1 of the HWPA has the following characteristics: the second polarized channel signal in C1 and The polarizing direction of PolarizerA is orthogonal, therefore, PolarizerA only outputs the first polarized channel signal OutputA; B2 enters the first HWPB, and the output C2 of HWPB has the following characteristics: that is, the first polarized channel signal in C2 is in the same polarizing direction as PolarizerB Orthogonal, so PolarizerB only outputs the second polarized channel signal...
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The invention discloses a polarization demultiplexing device, comprising a first wave plate device, a second wave plate device and a polarization partial wave device; the first wave plate device is used for changing a polarization multiplexing signal with arbitrary input polarization state into a linear polarization multiplexing signal; the second wave plate device is used for changing the linearpolarization multiplexing signal to lead the linear polarization multiplexing signal to be aligned to a main shaft of the following polarization partial wave device; the polarization partial wave device is used for separating the polarization multiplexing signal into a first polarization signal output and a second polarization signal output. The invention also provides a polarization multiplexinglight communication system and an implementation method by adopting the polarization demultiplexing device; the invention simplifies the structure of the polarization demultiplexing device, reduces the complexity of polarization control correspondingly and improves the response efficiency of the polarization demultiplexing device; meanwhile, the second wave plate device is adopted to adjust the angle of polarization communication channel and main shafts of two polarization polarizers, and polarization communication channel crosstalk caused by the damage of polarization communication channel orthogonality caused by PDL is eliminated.
Description
technical field [0001] The invention relates to the field of optical communication systems, in particular to a polarization demultiplexing device, a polarization multiplexing optical communication system and an implementation method. Background technique [0002] The meanings of technical terms used in the present invention are as follows: [0003] WDM, Wavelength Division Multiplexing, wavelength division multiplexing; [0004] PDM, Polarization Division Multiplexing, polarization multiplexing; [0005] PC, Polarization Controller, polarization controller; [0006] PDD, Polarization Demultiplexing Device, polarization demultiplexer; [0007] PBC, Polarization Beam Combiner, polarization beam combiner; [0008] PBS, Polarization Beam Separator, polarizing beam splitter; [0009] QWP, Quarter Wave Plane, 1 / 4 wave plate; [0010] HWP, Half Wave Plane, half wave plate; [0011] PMD, Polarization Mode Dispersion, polarization mode dispersion; [0012] PDG, polarization M...
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IPC IPC(8): H04J14/06G02B6/27H04B10/2507
Inventor 张新全杨铸
Owner WUHAN POST & TELECOMM RES INST CO LTD