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公开(公告)号：US10177852B2
公开(公告)日：2019-01-08
申请号：US15570770
申请日：2015-05-04
发明人： Yuqi Chen , Bing Fang , Yongzhan Zhao
IPC分类号： H04B10/556 , H04B10/516 , H04B10/54 , H04B10/564 , H04B10/50
摘要： The present disclosure discloses a method and an apparatus for automatically controlling a bias voltage of an optical modulator. The method includes: calculating a new Q bias voltage based on an acquired Q reference phase, a Q harmonic phase, a Q harmonic amplitude, a Q bias voltage and a Q error feedback coefficient, calculating a new I bias voltage based on an I reference phase, an I harmonic phase, an I harmonic amplitude, an I bias voltage and an I error feedback coefficient, and calculating a new P bias voltage based on a P reference phase, a P harmonic phase, a P harmonic amplitude, a P bias voltage and a P error feedback coefficient.
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公开(公告)号：US20180123698A1
公开(公告)日：2018-05-03
申请号：US15570770
申请日：2015-05-04
发明人： Yuqi Chen , Bing Fang , Yongzhan Zhao
IPC分类号： H04B10/516 , H04B10/556 , H04B10/54 , H04B10/564
CPC分类号： H04B10/5161 , H04B10/5053 , H04B10/5057 , H04B10/50575 , H04B10/541 , H04B10/556 , H04B10/564
摘要： The present disclosure discloses a method and an apparatus for automatically controlling a bias voltage of an optical modulator. The method includes: calculating a new Q bias voltage based on an acquired Q reference phase, a Q harmonic phase, a Q harmonic amplitude, a Q bias voltage and a Q error feedback coefficient, calculating a new I bias voltage based on an I reference phase, an I harmonic phase, an I harmonic amplitude, an I bias voltage and an I error feedback coefficient, and calculating a new P bias voltage based on a P reference phase, a P harmonic phase, a P harmonic amplitude, a P bias voltage and a P error feedback coefficient.
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公开(公告)号：US10158428B2
公开(公告)日：2018-12-18
申请号：US15675780
申请日：2017-08-13
发明人： Yuqi Chen , Bing Fang , Yongzhan Zhao
IPC分类号： G02F1/01 , G05F1/46 , H04B10/25 , H04B10/079 , H04B10/516 , H04B10/2575
摘要： A method and an apparatus for digitally and automatically controlling a bias voltage of an electro-optic optical modulator are disclosed. The method includes: outputting a scanning bias voltage; acquiring a first optical signal; converting the first optical signal into a first electrical signal; outputting a first direct current signal; calculating an operating bias voltage at each operating point and a half-wave voltage; calculating an error feedback coefficient and a dither amplitude; outputting an operating bias voltage and a dither signal with the dither amplitude; acquiring a second optical signal; converting the second optical signal into a second electrical signal; outputting a harmonic component; calculating a harmonic amplitude and a shift phase; calculating a new bias voltage; and using the new bias voltage as the operating bias voltage.
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4.发明申请公开(公告)号：US20170359122A1
公开(公告)日：2017-12-14
申请号：US15675780
申请日：2017-08-13
发明人： Yuqi Chen , Bing Fang , Yongzhan Zhao
IPC分类号： H04B10/2575 , H04B10/516 , H04B10/079 , G05F1/46 , G02F1/01 , H04B10/25
CPC分类号： H04B10/2575 , G02F1/0115 , G05F1/46 , H04B10/07955 , H04B10/2504 , H04B10/516
摘要： A method and an apparatus for digitally and automatically controlling a bias voltage of an electro-optic optical modulator are disclosed. The method includes: outputting a scanning bias voltage; acquiring a first optical signal; converting the first optical signal into a first electrical signal; outputting a first direct current signal; calculating an operating bias voltage at each operating point and a half-wave voltage; calculating an error feedback coefficient and a dither amplitude; outputting an operating bias voltage and a dither signal with the dither amplitude; acquiring a second optical signal; converting the second optical signal into a second electrical signal; outputting a harmonic component; calculating a harmonic amplitude and a shift phase; calculating a new bias voltage; and using the new bias voltage as the operating bias voltage.
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