250W continuous-tunable all-fiberized single-frequency polarization-maintained amplifiers with wavelength spanning from 1065 nm to 1090 nm

In this manuscript, we demonstrate an all-fiberized, single-frequency and polarization-maintained (PM) amplifiers with wavelength tuned from 1065 nm to 1090 nm. The ASE is suppressed by a signal to noise ratio of higher than 27 dB, and each wavelengths can be amplified to be 250 W output power. The stimulated Brillouin scattering (SBS) effect in such high power amplifiers is suppressed by employing a high dopant fiber (10 dB/m). The polarization extinction ratio (PER) of the amplifier is over 20 dB at the maximum output power. It should be noted that although the experiments are conducted at the wavelength from 1065 nm to 1090 nm with a step of 5 nm, the wavelength can also be continuously tuned.

[1]  D. Kracht,et al.  All-Fiber Counter-Propagation Pumped Single Frequency Amplifier Stage With 300-W Output Power , 2012, IEEE Photonics Technology Letters.

[2]  D. V. Churkin,et al.  All-fiber widely tunable Raman fiber laser with controlled output spectrum , 2007 .

[3]  John M. Fini,et al.  11.2 dB SBS gain suppression in a large mode area Yb-doped optical fiber , 2008, SPIE LASE.

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

[5]  Lu Chai,et al.  Generation of 110-W sub-100-fs Pulses at 100 MHz by Nonlinear Amplification Based on Multicore Photonic Crystal Fiber , 2016, IEEE Photonics Journal.

[6]  A. B. Ruffin,et al.  Design concept for optical fibers with enhanced SBS threshold. , 2005, Optics express.

[7]  A Silva,et al.  Wavelength-swept Yb-fiber master-oscillator-power-amplifier with 70 nm rapid tuning range. , 2011, Optics express.

[8]  A. Hardy,et al.  Optimization of strongly pumped fiber lasers , 1999 .

[9]  R. Beach,et al.  Analysis of the scalability of diffraction-limited fiber lasers and amplifiers to high average power. , 2008, Optics express.

[10]  Wei Shi,et al.  2 kW narrow spectral width monolithic continuous wave in a near-diffraction-limited fiber laser. , 2015, Applied optics.

[11]  Y. Jeong,et al.  Power Scaling of Single-Frequency Ytterbium-Doped Fiber Master-Oscillator Power-Amplifier Sources up to 500 W , 2007, IEEE Journal of Selected Topics in Quantum Electronics.

[12]  Kazuhide Nakajima,et al.  Evaluation methods and requirements for the stimulated Brillouin scattering threshold in a single-mode fiber , 2008 .

[13]  D. V. Murphy,et al.  Coherent combining of a 4 kW, eight-element fiber amplifier array. , 2011, Optics letters.

[14]  Cesar Jauregui,et al.  High-power fibre lasers , 2013 .

[15]  Pengfei Ma,et al.  414  W near-diffraction-limited all-fiberized single-frequency polarization-maintained fiber amplifier. , 2017, Optics letters.

[16]  Pengfei Ma,et al.  560  W all fiber and polarization-maintaining amplifier with narrow linewidth and near-diffraction-limited beam quality. , 2015, Applied optics.

[17]  M. Zervas,et al.  High Power Fiber Lasers: A Review , 2014, IEEE Journal of Selected Topics in Quantum Electronics.

[18]  Jens Limpert,et al.  High average power spectral beam combining of four fiber amplifiers to 8.2 kW. , 2011, Optics letters.

[19]  Pan Fu,et al.  An Efficient Single-Frequency Yb-Doped All-Fiber MOPA Laser at 1064.3 nm* , 2016 .

[20]  Ritwick Das,et al.  Yb-fiber laser pumped high-power, broadly tunable, single-frequency red source based on a singly resonant optical parametric oscillator. , 2016, Optics letters.

[21]  Iyad Dajani,et al.  Modal instability-suppressing, single-frequency photonic crystal fiber amplifier with 811 W output power. , 2014, Optics letters.

[22]  Hanwei Zhang,et al.  Diode-Pumped 1178-nm High-Power Yb-Doped Fiber Laser Operating at 125 $^{\circ}$C , 2016, IEEE Photonics Journal.

[23]  Pengfei Ma,et al.  293 W, GHz narrow-linewidth, polarization maintaining nanosecond fiber amplifier with SBS suppression employing simultaneous phase and intensity modulation. , 2015, Optics express.

[24]  Pengfei Ma,et al.  Single-frequency 332 W, linearly polarized Yb-doped all-fiber amplifier with near diffraction-limited beam quality. , 2013, Applied optics.

[25]  Iyad Dajani,et al.  Multi-kilowatt power scaling and coherent beam combining of narrow-linewidth fiber lasers , 2016, LASE.

[26]  Sergey A Babin,et al.  Tunable CW all-fiber optical parametric oscillator operating below 1 μm. , 2013, Optics express.