Tunable Stokes laser generation based on the stimulated polariton scattering in KTiOPO₄ crystal.

The tunable Stokes laser characteristics based on the stimulated polariton scattering in KTiOPO4 (KTP) crystal and the intracavity frequency doubling properties for the Stokes laser are investigated for the first time. When the pumping laser wavelength is 1064.2 nm, and the angle between the pumping and Stokes beams outside the KTP crystal changes from 1.875° to 6.750°, the obtained tunable Stokes laser wavelength varies discontinuously from 1076.5 nm to 1091.4 nm with four gaps. When the pumping pulse energy is 120.0 mJ, the maximum Stokes pulse energy is 46.5 mJ obtained at the wavelength of 1086.6 nm. By inserting a LiB3O5 (LBO) crystal into the cavity, the obtained frequency-doubled laser wavelength is inconsecutive tunable from 538.5 nm to 543.8 nm. The maximum frequency-doubled laser pulse energy is 15.9 mJ at the wavelength of 543.5 nm.

[1]  F. Laurell,et al.  Highly efficient stimulated Raman scattering of picosecond pulses in KTiOPO4 , 2006 .

[2]  Y. Chen,et al.  Diode-pumped multi-frequency Q-switched laser with intracavity cascade Raman emission. , 2008, Optics express.

[3]  Y. S. Chen,et al.  Diode-pumped Q-switched laser with intracavity sum frequency mixing in periodically poled KTP , 2004 .

[4]  C. Tang,et al.  Optical parametric processes and broadly tunable femtosecond sources , 1994 .

[5]  Compact and Efficient 3.2-W Diode-Pumped Nd:YVO(4)/KTP Green Laser. , 1998, Applied optics.

[6]  Xiaowen Shu,et al.  70-W average-power doubly resonant optical parametric oscillator at 2 μm with single KTP , 2014 .

[7]  G. Massey,et al.  Raman and electrooptic properties of potaśsium titanate phosphate. , 1980, Applied Optics.

[8]  Weitao Wang,et al.  High-efficient diode-pumped actively Q-switched Nd:YAG/KTP Raman laser at 1096 nm wavelength , 2013 .

[9]  Takashi Kondo,et al.  Absolute scale of second-order nonlinear-optical coefficients , 1997 .

[10]  Ady Arie,et al.  Tunable midinfrared source by difference frequency generation in bulk periodically poled KTiOPO4 , 1999 .

[11]  Y. Chen,et al.  Comparative study of intracavity KTP-based Raman generation between Nd:YAP and Nd:YAG lasers operating on the (4)F(3/2) → (4)I(13/2) transition. , 2015, Optics express.

[12]  S. Bai,et al.  GTR-KTP enhanced stable intracavity frequency doubled Cr,Nd:YAG self-Q-switched green laser , 2015 .

[13]  M. Fontana,et al.  The vibrational spectrum of a KTiOPO4 single crystal studied by Raman and infrared reflectivity spectroscopy , 1988 .

[14]  A. M. Rudra,et al.  Highly efficient difference-frequency generation in KTP , 1996 .

[15]  J. Jabczynski,et al.  High-repetition-rate, intracavity-pumped KTP OPO at 1572 nm , 2005 .

[16]  Qingpu Wang,et al.  Extracavity pumped BaWO4 anti-Stokes Raman laser. , 2013, Optics express.

[17]  T. E. Gier,et al.  KxRb1−xTiOPO4: A new nonlinear optical material , 1976 .

[18]  Zengguang Qin,et al.  Terahertz parametric oscillator based on KTiOPO₄ crystal. , 2014, Optics letters.

[19]  Peter F. Moulton,et al.  Efficient, High-Energy, KTP Optical Parametric Oscillators Pumped with 1-mIcron Nd-lasers , 1993 .

[20]  Haitao Huang,et al.  Second Stokes 1129 nm generation in gray-trace resistance KTP intracavity driven by a diode-pumped Q-switched Nd:YVO4 laser , 2011 .

[21]  K. Kawase,et al.  1 Terahertz-Wave Parametric Generator ( TPG ) / Pumping source 1 . 1 Injection-seeded THz-wave Parametric Generator , 2001 .

[22]  Shengzhi Zhao,et al.  Simultaneous Stokes and Anti-Stokes Lines Operation Within a Yb:YAG Laser at 1050 nm , 2014, IEEE Photonics Technology Letters.

[23]  J. Hellström,et al.  Widely and continuously tunable optical parametric oscillator based on a cylindrical periodically poled KTiOPO(4) crystal. , 2001, Optics letters.

[24]  M. Roth,et al.  High conversion efficiency of an eye-safe KTP monolithic OPO , 2002 .