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1. 发明专利

JP2009027517A Optical transmission circuit 有权
标题翻译：光传输电路
公开(公告)号：JP2009027517A
公开(公告)日：2009-02-05
申请号：JP2007189469
申请日：2007-07-20
申请人： Ntt Electornics Corp , Nttエレクトロニクス株式会社
发明人： YONEYAMA MIKIO , ONO SHIGERU , SAITO FUMIAKI , TAKEUCHI YOSUKE , KUSANAGI KUNIMI , FUJITA KENJI , KOJIMA KENJI
IPC分类号： H04B10/516 , G02F1/01 , H04B10/07 , H04B10/524 , H04B10/54 , H04B10/556 , H04B10/61
摘要： PROBLEM TO BE SOLVED: To provide an optical transmission circuit which has solved the problems in the conventional art in which a delay time (time from clock input to data rewriting) in a retiming circuit varies dependent on temperature, power supply voltage and deterioration with time, causing degradation of a waveform quality of output pulses because deviation from a phase optimization point cannot be corrected automatically by the variation of the delay time owing to subsequent variation factors even if offset voltage is adjusted with the initial delay time, and which can automatically optimize a relative phase between two modulators without requiring a high speed timing extraction circuit or a phase comparator.
SOLUTION: The optical transmission circuit of the invention includes a phase modulator which modulates a phase with an output from a differential encoding circuit, and an intensity modulator which modulates a signal intensity for phase modulation light from the phase modulator with a clock signal, so that a relative phase between the phase modulator and the intensity modulator can be optimized to maximize the average intensity of the output light from the intensity modulator.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：解决了解决现有技术中的问题的光传输电路，其中重新定时电路中的延迟时间（从时钟输入到数据重写的时间）取决于温度，电源电压和随着时间的恶化，导致输出脉冲的波形质量劣化，因为即使在初始延迟时间调整偏移电压的情况下，由于随后的变化因素而不能通过延迟时间的变化自动校正相位优化点的偏差，并且哪个可以自动优化两个调制器之间的相对相位，而不需要高速定时提取电路或相位比较器。解决方案：本发明的光传输电路包括相位调制器，其利用差分编码电路的输出调制相位，以及强度调制器，其利用时钟信号调制来自相位调制器的相位调制光的信号强度，使得可以优化相位调制器和强度调制器之间的相对相位，以最大化来自强度调制器的输出光的平均强度。版权所有（C）2009，JPO＆INPIT

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