Efficient diode-pumped yellow, orange and red laser sources based on stimulated Raman scattering in KGd (WO4)2

The average power of diode-pumped fiber lasers has been developed deeply into the kW regime in the past years. However, stimulated Raman scattering (SRS) is still a major factor limiting the further power scaling. Here, we have demonstrated the mitigation of SRS in kilowatt-level diode-pumped fiber amplifiers using a chirped and tilted fiber Bragg grating (CTFBG) for the first time. The CTFBG is designed and inscribed in large-mode-area (LMA) fibers, matching with the operating wavelength of the fiber amplifier. With the CTFBG inserted between the seed laser and the amplifier stage, an SRS suppression ratio of ${\sim}10~\text{dB}$ is achieved in spectrum at the maximum output laser power of 2.35 kW, and there is no reduction in laser slope efficiency and degradation in beam quality. This work proves the feasibility and practicability of CTFBGs for SRS suppression in high-power fiber lasers, which is very useful for the further power scaling.

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Stimulated Raman Scattering in YVO4 and GdVO4 Crystals and Self Raman Frequency Conversion in Diode Pumped Nd3+:GdVO4 Laser

Advanced Solid-State Photonics (TOPS) ◽

10.1364/assp.2004.298 ◽

2004 ◽

Author(s):

Tasoltan T. Basiev ◽

Peter G. Zverev ◽

Alexander Ya. Karasik ◽

Sergey V. Vassiliev ◽

Alexander A. Sobol ◽

...

Keyword(s):

Raman Scattering ◽

Frequency Conversion ◽

Stimulated Raman Scattering ◽

Raman Frequency ◽

Diode Pumped ◽

Stimulated Raman

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Effective suppression of stimulated Raman scattering in direct laser diode pumped 5 kilowatt fiber amplifier using chirped and tilted fiber bragg gratings

Laser Physics Letters ◽

10.1088/1612-202x/aba051 ◽

2020 ◽

Vol 17 (8) ◽

pp. 085104

Author(s):

Xin Tian ◽

Xiaofan Zhao ◽

Meng Wang ◽

Zefeng Wang

Keyword(s):

Raman Scattering ◽

Laser Diode ◽

Stimulated Raman Scattering ◽

Fiber Bragg Gratings ◽

Bragg Gratings ◽

Fiber Amplifier ◽

Effective Suppression ◽

Direct Laser ◽

Diode Pumped ◽

Stimulated Raman

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Efficient self-stimulated Raman scattering with simultaneously self-mode-locking in a diode-pumped Nd:GdVO_4 laser

Applied Optics ◽

10.1364/ao.55.009000 ◽

2016 ◽

Vol 55 (32) ◽

pp. 9000 ◽

Cited By ~ 1

Author(s):

Zuohan Li ◽

Jiying Peng ◽

Jianquan Yao ◽

Ming Han ◽

Linghong Jiang

Keyword(s):

Raman Scattering ◽

Stimulated Raman Scattering ◽

Mode Locking ◽

Diode Pumped ◽

Stimulated Raman

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Closed-Form Calculation of Coherent Anti-Stokes Raman and Stimulated Raman Scattering Spectral Profiles

Applied Spectroscopy ◽

10.1366/0003702814732698 ◽

1981 ◽

Vol 35 (3) ◽

pp. 276-278 ◽

Cited By ~ 4

Author(s):

P. E. Perkins ◽

J. W. L. Lewis

Keyword(s):

Raman Scattering ◽

Closed Form ◽

Stimulated Raman Scattering ◽

Third Order ◽

The Third ◽

Spectral Profiles ◽

Laser Sources ◽

Anti Stokes ◽

Order Susceptibility ◽

Stimulated Raman

The third-order susceptibility is expressed as a summation of interfering resonant terms, each involving the phenomenological linewidth of the transition. Correlations of the finite linewidth of the laser sources with |χ(3)|2 (coherent anti-Stokes Raman spectroscopy) and –χ” (stimulated Raman scattering) are performed and closed-form expressions for the theoretical profiles are obtained.

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