Passively Q-switched self-frequency-doubled Nd 3+ :GdCa 4 O(BO 3 ) 3 laser

The performance of a flash-lamp-pumped self-frequency-doubled Nd3+:GdCa4O(BO3)3 (Nd:GdCOB) laser that is passively Q switched with Cr4+:YAG saturable absorbers is demonstrated. The maximum 0.53-µm pulse energy obtained is 2.6 mJ, and the maximum peak intensity is 15 MW/cm2. The dependence of the pulse characteristics on the orientation of the saturable absorber and on the cavity length is measured. Meanwhile, the transversal distribution of the intracavity photon density is taken into account in the rate equations for an intracavity frequency-doubled passively Q-switched laser, and the solutions are used to account for the behavior of the passively Q-switched Nd:GdCOB laser.

[1]  William G. Wagner,et al.  Evolution of the Giant Pulse in a Laser , 1963 .

[2]  A. Szabo,et al.  Theory of Laser Giant Pulsing by a Saturable Absorber , 1965 .

[3]  James E. Murray,et al.  Pulse Lengthening Via Overcoupled Internal Second‐Harmonic Generation , 1970 .

[4]  Walter Koechner,et al.  Solid-State Laser Engineering , 1976 .

[5]  J. J. Degnan,et al.  Theory of the optimally coupled Q-switched laser , 1989 .

[6]  S. M. Jacobsen,et al.  Saturation of 1.064 μm absorption in Cr,Ca:Y3Al5O12 crystals , 1992 .

[7]  Hergen Eilers,et al.  Performance of a Cr:YAG laser , 1993 .

[8]  Hoffman,et al.  Spectroscopy and dynamics of Cr4+:Y3Al5O12. , 1994, Physical review. B, Condensed matter.

[9]  P. Yankov.  Cr4+:YAG Q-switching of Nd:host laser oscillators , 1994 .

[10]  J. J. Degnan,et al.  Optimization of passively Q-switched lasers , 1995 .

[11]  Alexander L. Gaeta,et al.  Intra-cavity frequency-doubling of a Nd:YAG laser passively Q-switched with GaAs , 1997 .

[12]  Klaus J. Boller,et al.  Diode-pumped passively Q-switched self-frequency-doubling Nd:YAB laser , 1997 .

[13]  Santiago Camacho-López,et al.  Intensity-induced birefringence in Cr4+: YAG , 1997 .

[14]  F. Heine,et al.  Intracavity frequency-doubled diode-pumped Nd : LaSc3(BO3)4 lasers , 1997 .

[15]  A. Kahn-Harari,et al.  Infrared laser performance and self-frequency doubling of Nd3+:Ca4GdO(BO3)3 (Nd:GdCOB) , 1997 .

[16]  Shaojun Zhang,et al.  Optimization of Cr/sup 4+/-doped saturable-absorber Q-switched lasers , 1997 .

[17]  Y.F. Chen,et al.  Passive Q-switching of an intracavity frequency doubled diode-pumped Nd:YVO/sub 4//KTP green laser with Cr/sup 4+/:YAG , 1997, IEEE Photonics Technology Letters.

[18]  Shaojun Zhang,et al.  Laser diode pumped Cr4+:YAG passively Q-switched Nd3+:S-FAP laser , 1998 .

[19]  S A Payne,et al.  Analysis of an intracavity-doubled diode-pumped Q-switched Nd:YAG laser producing more than 100 W of power at 0.532 microm. , 1998, Optics letters.

[20]  Yehoshua Kalisky,et al.  Excited-state absorption studies of Cr/sup 4+/ ions in several garnet host crystals , 1998 .

[21]  F. Balembois,et al.  New green self-frequency-doubling diode-pumped Nd:Ca4GdO(BO3)3 laser , 1998 .

[22]  Dalwoo Kim,et al.  Optimization of intracavity doubled passively Q-switched solid-state lasers , 1999 .

[23]  Horst Weber,et al.  Modeling of diode-pumped actively Q-switched lasers , 1999 .

[24]  Z. Shao,et al.  Growth and investigation of efficient self-frequency-doubling NdxGd1−xCa4O(BO3)3 crystal , 1999 .

[25]  Gerard Aka,et al.  Ytterbium-doped Ca 4 GdO(BO 3 ) 3 : an efficient infrared laser and self-frequency doubling crystal , 1999 .

[26]  Michael Bass,et al.  Z-scan measurement of the ground and excited state absorption cross sections of Cr/sup 4+/ in yttrium aluminum garnet , 1999 .

[27]  Katsumi Midorikawa,et al.  Absorption and oscillation characteristics of a pulsed Cr/sup 4+/:YAG laser investigated by a double-pulse pumping technique , 1999 .

[28]  Horst Weber,et al.  Modeling of passively Q-switched lasers , 2000 .

[29]  Analysis of a large-mode neodymium laser passively Q switched with a saturable absorber and a stimulated-Brillouin-scattering mirror , 2000 .

[30]  Second-harmonic generation by Nd/sup 3+/:YAG/Cr/sup 4+/:YAG laser pulses with changing state of polarization , 2000, Nonlinear Optics: Materials, Fundamentals, and Applications. Technical Digest. Postconference Edition. TOPS Vol.46 (IEEE Cat. No.00CH37174).

[31]  V. Aboites,et al.  Second-harmonic generation by Nd 3+ :YAG/Cr 4+ :YAG-laser pulses with changing state of polarization , 2000 .

[32]  Z. Shao,et al.  Efficient self-frequency doubling of Nd:GdCOB crystal by type-I phase matching out of its principal planes , 2000 .