CAJ | 학술논문

　　为了实现对双电极马赫-曾德尔电光调制器任意直流偏置点的自动偏置控制，采用在闭环控制基础上，引入一个可调移相器使不同直流偏置点处误差信号相同的方法，理论分析了可调移相器相移量与直流偏置相位的关系，仿真得到对于不同偏置点，当调制器直流偏置相位漂移达-0.15rad ～0.08rad，移相器引入附加相位漂移-0.55rad～0.55rad时，经偏置控制后相位漂移被限制在-3.0×10-4 rad～1.7×10-4 rad范围内。结果表明，该方法有效实现了对电光调制器任意直流偏置点的自动偏置控制。
　　위료실현대쌍전겁마혁-증덕이전광조제기임의직류편치점적자동편치공제，채용재폐배공제기출상，인입일개가조이상기사불동직류편치점처오차신호상동적방법，이론분석료가조이상기상이량여직류편치상위적관계，방진득도대우불동편치점，당조제기직류편치상위표이체-0.15rad ～0.08rad，이상기인입부가상위표이-0.55rad～0.55rad시，경편치공제후상위표이피한제재-3.0×10-4 rad～1.7×10-4 rad범위내。결과표명，해방법유효실현료대전광조제기임의직류편치점적자동편치공제。
To control the bias of dual-electrode Mach-Zehnder electro-optic modulators automatically,an adjustable phase shifter was introduced based on closed-loop control method so that the error signal remained the same at different direct-current(DC)bias points.The relationship between phase shift of the adjustable shifter and DC bias phase was derived by theoretical analysis.Simulation showed that,the drift of DC bias phase in the range of -0.15rad~0.08rad with the added phase drift caused by the phase shifter in the range of -0.55rad~0.55rad could be suppressed to -3.0 ×10-4 rad~1.7 × 10-4 rad at different DC bias points.The results show that the automatic bias control of an electro-optic modulator at any DC bias points is effectively achieved.