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5 November 2018 Mitigating stimulated brillouin scattering in fiber using tilted fiber Bragg grating
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Abstract
We have demonstrated here, to the best of our knowledge, for the first time the suppression of stimulated Raman scattering (SRS) in a monolithic fiber laser oscillator using chirped and tilted fiber Bragg gratings (CTFBGs). We designed and inscribed CTFBGs in large-mode-area (LMA) fibers according to the operating wavelength of the fiber laser oscillator. A maximum suppression ratio nearly 19 dB or 23 dB is achieved CTFBG insert before the OC grating or after the HR grating. By reducing the insertion loss and improving the transmission spectrum of the CTFBG, a promotion in laser efficiency could be achieved. This work provides a novel idea for SRS suppression in a high-power all-fiber oscillator system, which is very useful for the output power increasing of fiber oscillators.
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Meng Wang, Le Liu, Qihao Hu, Zefeng Wang, and Xiaojun Xu "Mitigating stimulated brillouin scattering in fiber using tilted fiber Bragg grating", Proc. SPIE 10811, High-Power Lasers and Applications IX, 108110C (5 November 2018); https://doi.org/10.1117/12.2500866
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