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Differential phase-shift key-control demodulator

A technology of keying demodulator and differential phase shift, which is applied in the field of signal processing, can solve the problems of high cost and large volume of differential phase shift keying demodulator, and achieve simple structure, improved processing technology, and simplified structure Effect

Inactive Publication Date: 2012-12-19
诺方(哈尔滨)科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In this kind of differential phase shift keying demodulator in the prior art, since the interferometer 11 adopts more components, the entire differential phase shift keying demodulator is larger in size and higher in cost

Method used

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Examples

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Embodiment Construction

[0011] figure 2 It is a schematic structural diagram of an embodiment of a differential phase-shift keying demodulator of the present invention; please refer to figure 2 , the present embodiment provides a differential phase-shift keying demodulator, including: Yaman interferometer, the Yaman interferometer includes an incident port 20, a first exit port 201, a second exit port 202, a first beam splitter slice 21, a second beam splitter 22, and at least one phase modulator disposed between the first beam splitter 21 and the second beam splitter 22, and the top surface of the first beam splitter 21 faces the second beam splitter The bottom surface of the sheet 22; the bottom surface of the first beam splitter 21 and the top surface of the second beam splitter 22 are respectively formed with a first reflective film 211 and a second reflective film 221 for completely reflecting an incident light beam, the first branch The top surface of the beam sheet 21 and the bottom surface...

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Abstract

The invention provides a differential phase-shift key-control demodulator comprising a Jamin interferometer. The Jamin interferometer comprises an incidence port, a first emitting port, a second emitting port, a first beam splitting slice and a second beam splitting slice which are completely identical in structures, and a phase modulator. The bottom surface of the first beam splitting slice and the top surface of the second beam splitting slice are respectively provided with a first reflection film and a second reflection film which are used for reflecting an incidence light beam, and a first light splitting film and a second light splitting film which are used for splitting an incidence light beam into two beams equal in energy are partially formed on the top surface of the first beam splitting slice and the bottom surface of the second beam splitting slice. A signal light beam is reflected into a reflection light beam and a transmission light beam via the first light splitting film, and the reflection light beam and / or the transmission light beam are encountered to interfere mutually to form a first interference light beam and a second interference light beam after passing the phase modulator, and are emitted respectively. The differential phase-shift key-control demodulator is simple in structure, small in size and low in manufacturing cost.

Description

technical field [0001] The invention relates to signal processing technology, in particular to a differential phase-shift keying demodulator. Background technique [0002] In the optical communication technology using differential phase shift keying (DPSK), the receiving end needs to use the differential phase shift keying demodulator to convert the phase modulation signal of the input information into a light intensity signal, so as to demodulate out the original digital information. [0003] figure 1 It is a structural schematic diagram of a differential phase-shift keying demodulator in the prior art; as figure 1 As shown, the differential phase shift keying demodulator in the prior art is mainly composed of an interferometer 11, wherein the interferometer 11 has an input port 111 and two output ports 112, and the input port 111 is provided with an input optical fiber A collimator 131, two output ports 112 are also respectively connected to the photoelectric conversion...

Claims

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Application Information

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IPC IPC(8): H04B10/158H04L27/22
Inventor 秦伟宿文玲
Owner 诺方(哈尔滨)科技股份有限公司
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