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QPSK -to-BPSK all-optical modulation format conversion system based on DPMZM

A modulation format and all-optical technology, applied in the field of communication, can solve problems such as increasing system complexity and limiting conversion speed, and achieve the effect of increasing symbol rate and simple system structure

Active Publication Date: 2020-08-14
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Several existing technologies try to use the four-wave mixing (FWM) effect of optical fiber to convert the quadrature phase-shift keying (QPSK) format into the binary phase-shift keying (BPSK) format that is more suitable for long-distance communication, but these Some conversion technologies can only convert the quadrature (Q) signal of QPSK; some need to use a complex coherent receiver at the receiving end or use a feedback circuit to phase-lock with the transmitting end to convert and demodulate the signal, which limits the conversion speed ; There are also in order to convert the same phase (I) way, the introduction of grating and optical circulator further increases the complexity of the system

Method used

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  • QPSK -to-BPSK all-optical modulation format conversion system based on DPMZM
  • QPSK -to-BPSK all-optical modulation format conversion system based on DPMZM
  • QPSK -to-BPSK all-optical modulation format conversion system based on DPMZM

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Embodiment Construction

[0033] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0034] Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than physical drawings, and should...

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Abstract

The invention relates to a QPSK-to-BPSK all-optical modulation format conversion system based on DPMZM, and belongs to the technical field of communication. The system includes: a phase mapping mode of performing QPSK-to-BPSK format conversion based on FWM, a DPMZM bias point setting and electric signal input mode for QPSK-to-BPSK format conversion based on FWM; a signal processing mode for QPSK-to-BPSK format conversion based on FWM, and a signal extraction mode after QPSK-to-BPSK format conversion based on FWM. According to the system, as long as limit parameters of used devices allow, the symbol rate of input signals can be directly improved without changing the structure of the system; i-path and Q-path signals can be simultaneously converted and directly demodulated, a coherent receiver and a phase-locked loop are prevented from being used, and the system is simple in structure.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a DPMZM-based QPSK-to-BPSK all-optical modulation format conversion system. Background technique [0002] When multi-domain networks are interconnected, optical signals from different domains may have different modulation formats, or different modulation formats are required in different transmission scenarios. Therefore, all-optical networks are inevitably required to have the basic ability to perform all-optical format conversion. For long-distance transmission scenarios, phase-shift keying (PSK) has attracted widespread attention due to its higher spectral efficiency and ability to withstand greater dispersion and nonlinear effects. Several existing technologies try to use the four-wave mixing (FWM) effect of optical fiber to convert the quadrature phase-shift keying (QPSK) format into the binary phase-shift keying (BPSK) format that is more suitable for long-distance comm...

Claims

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Application Information

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IPC IPC(8): H04B10/516H04B10/548H04B10/556
CPCH04B10/516H04B10/548H04B10/5561Y02D30/70
Inventor 张琦涵巩小雪郭磊
Owner CHONGQING UNIV OF POSTS & TELECOMM
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