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Stimulated Raman scattering in Nd:SrWO4

✍ Scribed by H. Jelínková; J. Šulc; T.T. Basiev; P.G. Zverev; S.V. Kravtsov


Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
324 KB
Volume
2
Category
Article
ISSN
1612-2011

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✦ Synopsis


Stimulated Raman scattering process in Nd:SrWO 4 crystal was employed to frequency down-shift the fundamental frequency of a Nd:YAG mode-locked laser system. A single-pass configuration of Raman crystal was investigated for this purpose. After that Nd:SrWO 4 laser was built and coherent pumping by alexandrite laser radiation was used. The simultaneous generation of stimulated Raman scattering was proofed for the case of Q-switching and mode-locking of Nd:SrWO 4 Raman cavity. For Nd:YAG 50 ps long (1064 nm) pulsed pumping a single-pass first Stokes maximum energy and conversion efficiency were 1.6 mJ and 25% , respectively. With the free-running Nd:SrWO 4 laser the maximum energy of 90 mJ at wavelength 1057 nm was obtained. Q-switching with the LiF:F - 2 saturable absorber gave up to 1.3 mJ energy at the first Stokes frequency (1170 nm) in the pulse length of 3 ns. In mode-locking regime (with saturable absorber ML51 in dichlorethan or 3955 in ethanol), the total generated energy was 1.8 mJ and 2.4 mJ for ML51 and 3955 dyes, respectively. The SRS output at 1170 nm was approximately 20% of those values. Ch1 20.0 mVΩ M 10.0 ns A Ch1 31.2 mV T 1170 nm 10 ns/div Time dependence of pulse from Q-switched Nd 3+ :SrWO4 Raman laser (λ = 1170 nm)


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