Fast wavelength calibration method for spectrometers based on waveguide comb optical filter.
A novel fast wavelength calibration method for spectrometers based on a standard spectrometer and a double metal-cladding waveguide comb optical filter (WCOF) is proposed and demonstrated. By using the WCOF device, a wide-spectrum beam is comb-filtered, which is very suitable for spectrometer wavelength calibration. The influence of waveguide filter's structural parameters and the beam incident angle on the comb absorption peaks' wavelength and its bandwidth are also discussed. The verification experiments were carried out in the wavelength range of 200-1100 nm with satisfactory results. Comparing with the traditional wavelength calibration method based on discrete sparse atomic emission or absorption lines, the new method has some advantages: sufficient calibration data, high accuracy, short calibration time, fit for produce process, stability, etc.
Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Zhengang
Z
Yu
Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Meizhen
M
Huang
Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
Yang
Y
Wang
Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.
Ye
Y
Zou
Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
Zhenhua
Z
Sun
Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.
Zhuangqi
Z
Cao