INCREASING THE OUTPUT ENERGY OF THE RAMAN LASER BY A REPEATED USE OF A DEPLETED PUMP
Abstract
A method for increasing the output energy of an extracavity Raman laser with a double-pass pump is proposed. The method is based on the repeated recovery of a depleted pump in the zone of SRS generation and is demonstrated by the example of eye-safe Raman lasers with a KGW crystal pumped at geometries of E Ng, and Е Nm by pulsed multimode radiation of a Nd:KGW-laser with a 4F3/2 → 4I13/2 working transition. When returning 70 % of a depleted pump in the Raman laser, an efficiency of generation of eye-safe radiation at wavelengths of 1507 and 1538 nm increases by approximately 11 %.
About the Authors
A. A. RUSAK
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
U. I. DASHKEVICH
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
V. А. ORLOVICH
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
A. P. SHKADAREVICH
Unitary Enterprise “STC “LEMT” of the BelOMO”
Belarus
Belarus
References
1. Generation of 1.5-mm radiation through intracavity solid-state Raman shifting in Ba(NO3)2 nonlinear crystals / J. T. Murray [et al.] // Opt. Lett. – 1995 – Vol. 20. – P. 1017–1019.
2. Stimulated Raman Scattering Laser Oscillation around 1.6mm Carbon Dioxide Absorption Line / D. Sakaizawa [et al.] // Jpn. J. Appl. Phys. – 2008. – Vol. 47. – P. 1612–1614.
3. High-efficiency eye-safe intracavity Raman laser at 1531 nm with SrWO4 crystal / Y. X. Fan [et al.] // Appl. Phys. B. – 2008. – Vol. 93. – P. 327–330.
4. Eye-safe actively Q-switched diode-pumped lasers with Intracavity Raman conversion in YVO4, KGd(WO4)2, PbWO4, and Ba(NO3)2 crystals / V. I. Dashkevich [et al.] // Opt. Commun. – 2015. – Vol. 35. – P. 11–8.
5. Zverev, P. G. Stimulated Raman scattering of laser radiation in Raman crystals / P. G. Zverev, T. T. Basiev, A. M. Prokhorov // Opt. Mater. – 1999. – Vol. 11. – P. 335–352.
6. Dashkevich, V. I. Ring solid-state laser at 1538 nm / V. I. Dashkevich, V. A. Orlovich // Laser Phys. Lett. – 2011. – Vol. 8, no 9. – P. 661–667.
7. SRS Transformation of the Radiation of a Self-Pumped Phase-Conjugate Laser / T. T. Basiev [et al.] // Laser Phys. – 2003. – Vol. 13. – P. 1013–1016.
8. High average power generation in barium nitrate Raman laser / V. A. Lisinetskii [et al.] // Appl. Phys. B. – 2010. – Vol. 99. – P. 127–134.
9. Мочалов, И. В. Нелинейная оптика лазерного кристалла калий-гадолиниевого вольфрамата, активированного неодимом KGd(W04)2:Nd3+ / И. В. Мочалов // Оптич. журн. – 1995. – № 11. – С. 4–15.
10. Hodson, N. Laser Resonators and Beam Propagation: Fundamentals, Advanced Concepts and Applications / N. Hodson, H. Weber. – 2 ed. – USA: Springer, 2005.
Review
Views: 665
Email this article 