Sub-MHz ultrahigh-resolution optical spectrometry based on Brillouin dynamic gratings

We propose and demonstrate an ultrahigh-resolution optical spectrometry based on Brillouin dynamic gratings (BDGs). Taking advantage of creating a long grating in an optical fiber, an ultra-narrow bandwidth optical filter is realized by operating a BDG in a long single-mode fiber (SMF), and the opti...

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Bibliographic Details
Published inOptics letters Vol. 39; no. 10; p. 2967
Main Authors Dong, Yongkang, Jiang, Taofei, Teng, Lei, Zhang, Hongying, Chen, Liang, Bao, Xiaoyi, Lu, Zhiwei
Format Journal Article
LanguageEnglish
Published United States 15.05.2014
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Summary:We propose and demonstrate an ultrahigh-resolution optical spectrometry based on Brillouin dynamic gratings (BDGs). Taking advantage of creating a long grating in an optical fiber, an ultra-narrow bandwidth optical filter is realized by operating a BDG in a long single-mode fiber (SMF), and the optical spectrometry is performed by sweeping the center wavelength of the BDG-based filter through a swept-tuned laser. The BDG-based optical spectrometry features ultrahigh resolution, large wavelength coverage, and a simple direction-detection scheme. In the experiment, a 4 fm (0.5 MHz) spectral resolution is achieved by operating a BDG in a 400 m SMF, and the wavelength coverage can be readily extended to C+L bands with a commercial tunable laser.
ISSN:1539-4794
DOI:10.1364/ol.39.002967