发明名称 |
OPTICAL SWITCH ADJUSTING CIRCUIT, EYE OPENING MONITOR CIRCUIT, OPTICAL SIGNAL TRANSMITTING APPARATUS, FULL OPTICAL SIGNAL REPRODUCING APPARATUS, OTDM-DEMUX DEVICE AND OPTICAL SWITCH ADJUSTING METHOD |
摘要 |
<P>PROBLEM TO BE SOLVED: To adjust dynamic operation of an optical switch, easily, at low cost, within a small size and with high accuracy. <P>SOLUTION: An optical switch adjusting circuit 2 includes: a distributor 3 which splits input signal light INL and outputs it as reference signal light RL; a distributor 4 which splits output signal light OUTL from an optical switch 1 and outputs it as monitor signal light ML; an optical phase shifter 5 for shifting a phase relationship between the reference signal light RL and the monitor signal light ML; an interference signal light generator 6 for overlapping and interfering the reference signal light RL and the monitor signal light ML phase-shifted by the optical phase shifter 5; a photodetector 7 for detecting power of interference signal light IL; and a phase bias adjusting section 8 for feeding such a phase bias condition as to maximize an eye opening of the output signal light OUTL back to the optical switch 1 in accordance with a time average value of light power detected by the photodetector 7. <P>COPYRIGHT: (C)2011,JPO&INPIT |
申请公布号 |
JP2011055330(A) |
申请公布日期 |
2011.03.17 |
申请号 |
JP20090203532 |
申请日期 |
2009.09.03 |
申请人 |
NEC CORP |
发明人 |
KURIBAYASHI RYOSUKE |
分类号 |
H04B10/516;G02F1/03;H04B10/07;H04B10/524;H04B10/61;H04J14/08 |
主分类号 |
H04B10/516 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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