Single modulator realization method for CSRZ-DPSK

An implementation method and phase modulation technology, applied in electromagnetic wave transmission systems, electrical components, transmission systems, etc., can solve the problems of high cost and complexity of implementation, and achieve the effects of easy integration, simple implementation, and reduced cost and complexity
CN1845475AInactive Publication Date: 2006-10-11SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2006-10-11
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The implementation method for a CSRZ-DPSK single modulator comprises: 1) taking code pre-treatment to the input data and synchronous semi-speed clock signal to form phase-modulated semi-speed clock signal; 2) driving the former signal to amplify the small-amplitude signal with V pi voltage as two times to peak-teak value; 3) mapping signal into light carrier by optical modulation to form CSRZ-DPSK sequence that jumps ' pi' phase when input '0' or not when input '1'. This invention can reduce cost and complexity.
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Description

technical field

[0001] The invention relates to a method in the technical field of optical fiber communication, in particular to a method for realizing carrier suppression return to zero-differential phase shift keying (CSRZ-DPSK) optical modulation signal by single optical modulation. Background technique

[0002] With the development of optical fiber communication technology, many new modulation formats have been used to improve the system's tolerance to optical fiber dispersion and nonlinearity. In recent years, two modulation formats based on differential phase shift keying (DPSK) have been introduced into the optical fiber In the field of communication, since this modulation format can obtain a 3dB enhancement of receiving sensitivity through differential reception (in a linear system, it means that the transmission distance can be doubled), and it shows a very superior tolerance to optical fiber nonlinearity, Effectively improve the transmission capacity of the optica...

Claims

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