1645-nm single-frequency, injection-seeded Q-switched Er:YAG master oscillator and power amplifier

Abstract. A 1645-nm injection-seeded Q-switched Er:YAG master oscillator and power amplifier system is reported. The master oscillator generates single-frequency pulse energy of 11.10 mJ with a pulse width of 188.8 ns at 200 Hz. An Er:YAG monolithic nonplanar ring oscillator is employed as a seed laser. The output pulse from the master oscillator is amplified to 14.33-mJ pulse energy through an Er:YAG amplifier, with a pulse width of 183.3 ns. The M2-factors behind the amplifier are 1.14 and 1.23 in x- and y-directions, respectively. The full width at half maximum of the fast Fourier transformation spectrum of the heterodyne beating signal is 2.84 MHz.

[1]  Haro Fritsche,et al.  Dual-wavelength Q-switched Er:YAG laser around 1.6 μm for methane differential absorption lidar , 2013 .

[2]  Sammy W. Henderson,et al.  Eyesafe diffraction-limited single-frequency 1-ns pulsewidth Er:YAG laser transmitter , 2007, SPIE Defense + Commercial Sensing.

[3]  Y Z Wang,et al.  Single-frequency, injection-seeded Er :YAG laser based on a bow-tie ring slave resonator , 2015 .

[4]  H Komine,et al.  Coherent combination of high-power, zigzag slab lasers. , 2006, Optics letters.

[5]  Shuichi Fujikawa,et al.  Diode-pumped 1 kW Q-switched Nd:YAG rod laser with high peak power and high beam quality. , 2005, Applied optics.

[6]  B. Köhler,et al.  High-power, longitudinally fiber-pumped, passively Q-switched Nd:YAG oscillator-amplifier. , 2006, Optics letters.

[7]  Minglun Gong,et al.  120 W high repetition rate Nd:YVO4 MOPA laser with a Nd:YAG cavity-dumped seed laser , 2009 .

[8]  Qing Ye,et al.  Single-frequency operation of a resonantly pumped 1.645μm Er:YAG Q-switched laser , 2014, Photonics West - Lasers and Applications in Science and Engineering.

[9]  Eric Lallier,et al.  120mJ Q-switched Er:YAG laser at 1645nm. , 2014, Optics express.

[10]  Da-Wun Chen,et al.  Multiwatt continuous-wave and Q-switched Er:YAG lasers at 1645 nm: performance issues. , 2009, Optics letters.

[11]  Xiaoming Duan,et al.  Single-frequency, Q -switched Er:YAG at room temperature injection-seeded by an Er:YAG nonplanar ring oscillator , 2014 .

[12]  Q. Ye,et al.  Single-frequency, injection-seeded Q-switched operation of resonantly pumped Er:YAG ceramic laser at 1645 nm , 2016 .

[13]  Lei Wang,et al.  Frequency stabilization of a single-frequency Q-switched Tm:YAG laser by using injection seeding technique. , 2011, Applied optics.

[14]  M. Esser,et al.  Compact fibre-laser-pumped Ho:YLF oscillator–amplifier system , 2010, CLEO/Europe - EQEC 2009 - European Conference on Lasers and Electro-Optics and the European Quantum Electronics Conference.

[15]  Inon Moshe,et al.  2 kW, M2 < 10 radially polarized beams from aberration-compensated rod-based Nd:YAG lasers. , 2007, Optics letters.