Resolution improvement of grating spectrometer by using a tunable Fabry-Perot filter

Liang Fang; Zhendong Shi; Chuankai Qiu; Chongxi Zhou

doi:10.1117/12.2202801

8 October 2015 Resolution improvement of grating spectrometer by using a tunable Fabry-Perot filter

Liang Fang, Zhendong Shi, Chuankai Qiu, Chongxi Zhou

Author Affiliations +

Proceedings Volume 9677, AOPC 2015: Optical Test, Measurement, and Equipment; 96772D (2015) https://doi.org/10.1117/12.2202801
Event: Applied Optics and Photonics China (AOPC2015), 2015, Beijing, China

Abstract

Aiming at the problem of the resolution reduction in a miniaturized grating spectrometer, we presented a method to improve its spectral resolution by inserting a tunable Fabry-Perot filter into its optical path before the grating. The Fabry-Perot filter was designed to filter out a partial spectrogram and separate the original undistinguishable spectral lines so as to make their actual wavelengths can be detected. The different cavity length of the Fabry-Perot filter is corresponding to the different separated partial spectrogram. Combining all the separated partial spectrograms, an entire spectrogram with improved resolution can be achieved. Experimentally, the spectral resolution of a grating dispersive system was improved from 2 nm to 1.2nm in a broad spectral range by insetting a homemade tunable Fabry-Perot filter, which demonstrated the feasibility of this scheme. The tunable Fabry-Perot filter is fit for miniaturization by using MEMS technology and is able to work as an independent module. The method proposed provides a potential way to improve the spectral resolution without reducing the spectral range of the existing miniaturized grating spectrometers.

Citation Download Citation

Liang Fang, Liang Fang, Zhendong Shi, Zhendong Shi, Chuankai Qiu, Chuankai Qiu, Chongxi Zhou, Chongxi Zhou, } "Resolution improvement of grating spectrometer by using a tunable Fabry-Perot filter", Proc. SPIE 9677, AOPC 2015: Optical Test, Measurement, and Equipment, 96772D (8 October 2015); doi: 10.1117/12.2202801; https://doi.org/10.1117/12.2202801

ACCESS THE FULL ARTICLE

PERSONAL SIGN IN
Full access may be available with your subscription

Email or Username Forgot your username?

Password Forgot your password?

Show

Remember Email/Username on this computer

Remember Password

No SPIE account? Create an account
or Institutional Sign In via Shibboleth

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $14.40

Non-members: $18.00 ADD TO CART

Show All Keywords

Keywords/Phrases

Search In:

Publication Years