IPro, PLLC
Method and apparatus for digitally and automatically controlling a bias voltage of electro-optic optical modulator
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.
PLUGTECH PRECISION SYSTEMS LIMITED (SHENZHEN)
H H H H G G H
H04B H04B H04B H04B G02F G05F H04B
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Yongzhan Bing Yuqi
Zhao Fang Chen