State;
Key;
laboratory;
of;
Precision;
Measurement;
Technology;
and;
Instruments,;
Tsinghua;
University,;
Beijing;
100084;
Institute;
of;
Semiconductors,;
Chinese;
Academy;
of;
Sciences,;
Beijing;
100083;
Ultrafast;
Laser;
Laboratory,;
School;
of;
Precision;
Instrument;
and;
Optoelectronics;
Engineering,;
University;
of;
Tianjin,;
Tianjin;
300072;
半导体技术; 可饱和吸收; 反射膜; 激光二极管; 调制宽度;