Key Lab of In-fiber Integrated Optics;
Ministry Education of China;
Harbin Engineering University;
Harbin150001;
China;
Yangtze Optical Fibre and Cable Joint Stock Limited Company;
Wuhan430073;
China;
Nanjing Institute of Astronomical Optics and Technology;
National Astronomical Observatories;
Chinese Academy ofSciences;
Nanjing210042;
China;
instrumentation:spectrographs; techniques:imaging; spectroscopy; techniques:spectroscopic; methods:miscellaneous;