Linearly-polarized narrow-linewidth random fiber laser seeded fiber MOPA

We propose and experimentally investigate a linearly-polarized narrow linewidth random fiber laser (RFL) operating at 1080 nm and boost the output power to kilowatt-level with near-diffraction-limited beam quality by a master-oscillation-power-amplifier (MOPA) configuration. The RFL based on half-opened cavity generates 0.71 W seed laser with 88 pm full width at half-maximum (FWHM) linewidth and 22.5 dB polarization extinction ratio (PER) for power scaling. Two stage fiber amplifier enhances the seed laser to maximal 1.01 kW with a PER value of 17 dB and a beam quality of Mx2=1.15 and My2=1.13. The FWHM linewidth of amplified random laser broadens linearly as a function of output power with a coefficient of about 0.1237 pm/ W. To the best of our knowledge, this is the first demonstration of linearly-polarized narrow linewidth RFL with even kilowatt-level near-diffraction-limited output.

[1]  D. Churkin,et al.  Narrow-band generation in random distributed feedback fiber laser. , 2013, Optics express.

[2]  Pu Zhou,et al.  Incoherently pumped high-power linearly-polarized single-mode random fiber laser: experimental investigations and theoretical prospects. , 2017, Optics express.

[3]  Yunjiang Rao,et al.  Recent advances in fundamentals and applications of random fiber lasers , 2015 .

[4]  S. Babin,et al.  Random distributed feedback fibre lasers , 2014 .

[5]  Diederik S. Wiersma,et al.  The physics and applications of random lasers , 2008 .

[6]  Bing He,et al.  10.8 kW spectral beam combination of eight all-fiber superfluorescent sources and their dispersion compensation. , 2016, Optics express.

[7]  Hu Xiao,et al.  High‐power random distributed feedback fiber laser: From science to application , 2016 .

[8]  M. Lopez-Amo,et al.  Temperature Fiber Laser Sensor Based on a Hybrid Cavity and a Random Mirror , 2012, Journal of Lightwave Technology.

[9]  Wei Sun,et al.  Long-distance random fiber laser point sensing system incorporating active fiber. , 2016, Optics express.

[10]  Pu Zhou,et al.  Powerful narrow linewidth random fiber laser , 2017 .

[11]  Jun Ye,et al.  Narrow-linewidth Q-switched random distributed feedback fiber laser. , 2016, Optics express.

[12]  Ekaterina A. Zlobina,et al.  High-order random Raman lasing in a PM fiber with ultimate efficiency and narrow bandwidth , 2016, Scientific Reports.

[13]  Lulu Wang,et al.  Tunable Erbium-Doped Fiber Laser Based on Random Distributed Feedback , 2014, IEEE Photonics Journal.

[14]  A Tünnermann,et al.  High power narrow-band fiber-based ASE source. , 2011, Optics express.