Acquisition of phase-shift fiber grating spectra with 235 femtometer spectral resolution using DFB-LD | Zendy

Cunguang Zhu | Zendy; Jun Chang | Zendy; Pengpeng Wang | Zendy; Wei Wei | Zendy; Sasa Zhang | Zendy; Zhi Liu | Zendy; GangDing Peng | Zendy

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Acquisition of phase-shift fiber grating spectra with 235 femtometer spectral resolution using DFB-LD

Author(s) -

Cunguang Zhu,

Jun Chang,

Pengpeng Wang,

Wei Wei,

Sasa Zhang,

Zhi Liu,

GangDing Peng

Publication year - 2013

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.21.031540

Subject(s) - optics , materials science , grating , fiber bragg grating , spectral line , wavelength , spectral resolution , laser , optical fiber , amplified spontaneous emission , fiber laser , resolution (logic) , optoelectronics , physics , astronomy , artificial intelligence , computer science

A novel method based on distributed-feedback laser diode (DFB-LD) continuous wavelength-scanning for acquiring precise spectra of phase-shift fiber gratings is presented. Compared to the traditional method, the spectral resolution retrieved by this method is only limited by the optical line-width of the light source, which can reach up to the order of femtometer and is much higher than that of high-resolution optical spectrum analyzer (generally on the order of picometer). In addition, a Signal-to-Noise Ratio (SNR) advantage can be provided owing to a much higher spectral density of DFB-LD than amplified spontaneous emission (ASE) source. Precise spectra of three phase-shift fiber grating samples have been obtained at a resolution of 23.5 femtometer.

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