Nonlinear transformation of the frequency in the YAG:Nd laser witha fiber ring cavity

V. I. Borisov; A. M. Krol; Vladimir P. Minkovich; N. P. Minkovich

doi:10.1117/12.345555

2 January 1998 Nonlinear transformation of the frequency in the YAG:Nd laser witha fiber ring cavity

V. I. Borisov, A. M. Krol, Vladimir P. Minkovich, N. P. Minkovich

Proceedings Volume 3211, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96; (1998) https://doi.org/10.1117/12.345555
Event: International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96, 1996, Madras, India

Abstract

Some nontrivial features of nonlinear transformation of frequency in the ring fiber resonator of free running YAG:Nd laser have been experimentally studied. Fiber of resonator has been matched with the laser active medium using microobjectives. Fibers of different lengths with the core diameters from 340 to 10 µm have been used. Nonlinear frequency transformation has been observed for fibers with core diameter of 60 pm and investigated lenths of resonator 43, 100 and 226 m. For all these fiber resonators in the antiStokes region spectral lines of 505, 532 and 558 nm have been presented. In the region of the Stokes component generation of the stimulated Raman scattering the row of narrow (with width less then 0.2 nm) spectral lines in the spectral region of 1127. . .1131 nm has been observed. The amount of the lines has been increased from 1 to 12 with increasing of the laser pumping power. In the anti-Stokes region for the long fibers (100 m and 226 m) the third harmonic of the main laser frequency additionally has been generated. Here it is also observed the two groups of lines in the spectral region of 1129 nm and 1137 nm, the amount of which depends from the pumping power of laser.In the same fibers under the excitation by the external YAG:Nd laser with the same power of radiation the spectral lines in the anti-Stokes region have not been observed and in the Stokes region the cascade generation of the stimulated Raman scattering has been taken place. The connection of the observed features with the spectral selective properties of the fiber ring resonator is discussed.

Citation Download Citation

V. I. Borisov, A. M. Krol, Vladimir P. Minkovich, and N. P. Minkovich "Nonlinear transformation of the frequency in the YAG:Nd laser witha fiber ring cavity", Proc. SPIE 3211, International Conference on Fiber Optics and Photonics: Selected Papers from Photonics India '96, (2 January 1998); https://doi.org/10.1117/12.345555

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