基于波导梳状光学滤波器的光谱仪快速波长校准方法

Fast wavelength calibration method for spectrometers based on waveguide comb optical filter.

作者信息

Yu Zhengang, Huang Meizhen, Wang Yang, Zou Ye, Sun Zhenhua, Cao Zhuangqi

机构信息

Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China.

Department of Physics and Astronomy, Shanghai Jiao Tong University, Shanghai 200240, China.

出版信息

Rev Sci Instrum. 2015 Apr;86(4):043103. doi: 10.1063/1.4914026.

DOI:10.1063/1.4914026

PMID:25933837

Abstract

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.

摘要

提出并演示了一种基于标准光谱仪和双包层波导梳状光学滤波器（WCOF）的新型光谱仪快速波长校准方法。通过使用WCOF器件，对宽光谱光束进行梳状滤波，这非常适合光谱仪的波长校准。还讨论了波导滤波器的结构参数和光束入射角对梳状吸收峰波长及其带宽的影响。在200-1100nm波长范围内进行了验证实验，结果令人满意。与基于离散稀疏原子发射或吸收线的传统波长校准方法相比，新方法具有一些优点：校准数据充足、精度高、校准时间短、适合生产过程、稳定性好等。