High peak power picosecond hybrid fiber and solid-state amplifier system

We report the high peak power picosecond hybrid fiber and solid-state laser amplifier system. The passively mode-locked solid-state seed source produced an average power of 1.8 W with pulse width of 14 ps and repetition rate of 86 MHz. It was directly coupled into the first Yb-doped polarized photonic crystal fiber amplifier stage. To avoid the nonlinear effects in fiber, the output power from the first stage was merely amplified to 24 W with the narrow spectra broadening of 0.21 nm. For the improvement of the peak power, the dual-end pumped composite Nd:YVO4 amplifier system has been chosen at the second stage. To reduce the serious thermal effect, the thermally bonded composite YVO4 – Nd:YVO4 – YVO4 rod crystal was used as the gain medium. The 53 W TEM00 mode with the peak power of 40 kW, beam quality of M2 < 1.15, corresponding to the optical-optical efficiency of 42.4% was obtained at the hybrid amplifier laser system. The system allows using a low power seed source and demonstrates an increase in the peak power beyond a fiber master oscillator power amplifier's (MOPA's) limit.

[1]  Tao Chen,et al.  All-fiberized MOPA structured single-mode pulse Yb fiber laser with a linearly polarized output power of 30 W , 2009 .

[2]  M J Dymott,et al.  Picosecond Diode-Pumped Laser System with 9.3-W Average Power and 2.3-mJ Pulse Energy. , 2001, Applied optics.

[3]  Sheng-Ping Chen,et al.  100 W all fiber picosecond MOPA laser. , 2009, Optics express.

[4]  J. Limpert,et al.  High-average-power picosecond Yb-doped fiber amplifier. , 2001, Optics letters.

[5]  Norman Hodgson,et al.  Hybrid fiber MOPA-bulk amplifier system for frequency conversion , 2008, SPIE LASE.

[6]  Dong Wang,et al.  A high efficient one-end-pumped TEM00 laser with optimal pump mode , 2008 .

[7]  G. C. Lim,et al.  Detailed investigation of thermal effects in longitudinally diode-pumped Nd:YVO/sub 4/ lasers , 2003 .

[8]  Minglun Gong,et al.  40 W picosecond fiber amplifier with the large mode-area polarized crystal fiber , 2009 .

[9]  Xinhong Yu,et al.  A laser-diode-pumped acoustic-optic Q-switched Nd:YVO4 slab laser with a hybrid resonator , 2009 .

[10]  J. Limpert,et al.  Low-nonlinearity single-transverse-mode ytterbium-doped photonic crystal fiber amplifier. , 2004, Optics express.

[11]  David J. Richardson,et al.  High-power high-brightness green laser based on a frequency doubled picosecond fiber laser , 2007, SPIE LASE.

[12]  Minglun Gong,et al.  Over 8 W high peak power UV laser with a high power Q-switched Nd:YVO4 oscillator and the compact extra-cavity sum-frequency mixing , 2009 .

[13]  C. Liu,et al.  A 15.1 W continuous wave TEM00 mode laser using a YVO4/Nd:YVO4 composite crystal , 2009 .

[14]  Junji Kawanaka,et al.  23.7-W picosecond cryogenic-Yb:YAG multipass amplifier. , 2007, Optics express.

[15]  J. Limpert,et al.  High-power picosecond fiber amplifier based on nonlinear spectral compression. , 2005, Optics letters.

[16]  Anand Asundi,et al.  Thermal lensing effects for diode-end-pumped Nd:YVO4 and Nd:YAG lasers , 2004 .

[17]  Minglun Gong,et al.  Compact TEM00 Nd:YVO4 slab laser end pumped by an LD bar , 2008 .

[18]  U. Keller.  Recent developments in compact ultrafast lasers , 2003, Nature.

[19]  Minglun Gong,et al.  Passively mode-locked Nd:YVO4 picosecond laser with oblique incidence on SESAM , 2008 .

[20]  Achim Nebel,et al.  111 W, 110 MHz repetition-rate, passively mode-locked TEM00Nd:YVO4 master oscillator power amplifier pumped at 888 nm. , 2007, Optics letters.

[21]  Yung-Fu Chen,et al.  Optimization in scaling fiber-coupled laser-diode end-pumped lasers to higher power: influence of thermal effect , 1997 .