Method and apparatus for generating differential quadrature phase shifting keying code optical signal

Abstract

The invention discloses a method and a device for producing a differential quadrature phase-shift keying code optical signal, which belong to the field of communication. The method comprises the steps of: performing light-splitting processing on an optical signal to obtain two polarized light signals; performing modulation and phase-shift processing on one of the polarized light signals to obtaina polarized light signal after the phase shift, and modulating the other polarized light signal to obtain another polarized modulated light signal; performing light combination processing on the polarized light signal after the phase shift and another polarized modulated light signal to obtain a polarization-multiplexed optical signal; and performing polarization processing on the polarization-multiplexed optical signal to obtain the differential quadrature phase-shift keying code optical signal. The device comprises a polarization light splitter, a modulator, a phase-shift controller, a polarization light combiner and a polarizer. The method and the device can steadily produce the differential quadrature phase-shift keying code optical signal through light-splitting processing, modulation and phase-shift processing, light combination processing and polarization processing. 本发明公开了一种产生差分正交相移键控码光信号的方法及装置，属于通信领域。所述方法包括：对光信号进行分光处理，得到两路偏振光信号；对所述两路偏振光信号中的一路进行调制和相移处理，得到一路经相移的偏振光信号，对所述两路偏振光信号中的另一路进行调制，得到另一路偏振调制光信号；对所述经另一路相移的偏振光信号和所述另一路偏振调制光信号进行合光处理，得到偏振复用的光信号；对所述偏振复用的光信号进行起偏处理，得到差分正交相移键控码光信号。所述装置包括：偏振分光器、调制器、相移控制器、偏振合光器和起偏器。本发明通过分光处理、调制和相移处理、合光处理和起偏处理，可以稳定产生差分正交相移键控码光信号。