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DQPSK integrated demodulation device

An integrated solution and polarized light technology, applied in the field of optical communication, can solve the problems of increased manufacturing cost and large size of demodulation equipment, and achieve the effect of reducing the volume, reducing the number of devices, and reducing the cost

Inactive Publication Date: 2017-05-31
李翠英
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  • Application Information

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Problems solved by technology

[0003] The DQPSK modulated signal must have a corresponding demodulator to demodulate and receive the signal and recover the received information. The traditional DQPSK demodulator uses two sets of DPSK demodulators to demodulate the DQPSK signal. , which not only makes the volume of the demodulation equipment larger, but also greatly increases the corresponding manufacturing cost

Method used

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  • DQPSK integrated demodulation device

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Embodiment

[0053] see figure 1 , the present invention is a DQPSK integrated demodulation device, which includes a polarized light interference system, a light detection array 900 and a coupler. The optical detection array 900 is a PD array, which is a high-speed optical receiver. The optical detection array 900 is located on the light output side of the polarized light interference system, and the coupler couples the output light of the polarized light interference system into the optical detection array 900, and then the optical detection The array 900 guides optical signals into a 40G optical transmission system.

[0054] The polarization interference system includes a delay line interference device, a polarized light generation component placed at the front end of the delay line interference device, and an optical coupling component placed at the rear end of the delay line interference device.

[0055] The optical fiber signal source device 100 is connected to the input end of the p...

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Abstract

The invention relates to a DQPSK integrated demodulation device, and belongs to the field of optical communication. The device comprises a polarized light interference system, an optical detection array (900), and a coupler. A delay line interference apparatus is disposed at a rear end of a polarized light generating module, and comprises a polarizer (321), a beam shifter II (222), a quarter wave plate II (322), a steering prism I ( 411), a polarization beam splitting / combining device (510), a quarter wave plate III (323), a phase adjuster (730), an optical wedge pair (710), a reflector (420) and a polarization analyzer (324). A beam combining coupling module is disposed at the rear end of the delay line interference apparatus, and comprises a polarizing beam-splitting device II (520), a steering prism III (415), a beam shifter III (223), a half wave plate II (312), a beam shifter IV (224), a half wave plate IV (314), a half wave plate III (313), a triangular prism I (811), a triangular prism II (812), a lens I (821) and a lens II (822). The device provided by the invention is small in size, and is good in performance.

Description

technical field [0001] The invention relates to a demodulation device, in particular to a demodulation device for realizing optical differential quadrature phase shift keying DQPSK (Differential Quaternary Phase-Shift Keying) modulated signal, which belongs to the field of optical communication. Background technique [0002] With the development of the communication industry, people are constantly pursuing a signal modulation method with high anti-interference and high transmission rate. The DQPSK modulation of light is a new modulation format in the field of optical communication. Since the DQPSK modulation signal has a higher tolerance to noise, nonlinear effects and coherent crosstalk, it is currently the only modulation technology that can complete 40Gb / s rate processing in a system with a channel spacing of 50GHz. [0003] The DQPSK modulated signal must have a corresponding demodulator to demodulate and receive the signal and recover the received information. The tradi...

Claims

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Application Information

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IPC IPC(8): H04B10/67
CPCH04B10/677
Inventor 郑龙日李翠英
Owner 李翠英
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