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High-efficiency LD-pumped all-fiber Raman laser based on a 100 μm core graded-index fiber. / Evmenova, E. A.; Kablukov, S. I.; Nemov, I. N. и др.
в: Laser Physics Letters, Том 15, № 9, 095101, 01.09.2018.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - High-efficiency LD-pumped all-fiber Raman laser based on a 100 μm core graded-index fiber
AU - Evmenova, E. A.
AU - Kablukov, S. I.
AU - Nemov, I. N.
AU - Wolf, A. A.
AU - Dostovalov, A. V.
AU - Tyrtyshnyy, V. A.
AU - Myasnikov, D. V.
AU - Babin, S. A.
N1 - Publisher Copyright: © 2018 Astro Ltd.
PY - 2018/9/1
Y1 - 2018/9/1
N2 - We demonstrate a high-power, high-efficiency Raman laser based on a 100 μm core graded-index (GRIN) fiber directly pumped by 915 nm multimode laser diode modules in all-fiber configuration. Optimization of GRIN fiber length and pumping scheme was performed. As a result, 62 W of CW power has been obtained at a wavelength of 954 nm with a slope efficiency of 85%. The joint action of Raman clean-up effect and mode-selection properties of special fiber Bragg gratings inscribed in the central part of the GRIN fiber core results in significant beam quality enhancement for the generated Stokes beam ( < 3) in comparison with that of the pump radiation ( > 30). In addition, the exact value of the operating wavelength near the Raman gain maximum was varied. To the best of our knowledge, this is the first study of the impact of a Raman gain spectral profile on the power, spectrum and beam quality parameter M 2 of multimode Raman laser. It appears that they very much dependent on the spectral region of Raman gain at which we work, when the wavelength is selected by a fiber Bragg grating inscribed in a multimode GRIN fiber.
AB - We demonstrate a high-power, high-efficiency Raman laser based on a 100 μm core graded-index (GRIN) fiber directly pumped by 915 nm multimode laser diode modules in all-fiber configuration. Optimization of GRIN fiber length and pumping scheme was performed. As a result, 62 W of CW power has been obtained at a wavelength of 954 nm with a slope efficiency of 85%. The joint action of Raman clean-up effect and mode-selection properties of special fiber Bragg gratings inscribed in the central part of the GRIN fiber core results in significant beam quality enhancement for the generated Stokes beam ( < 3) in comparison with that of the pump radiation ( > 30). In addition, the exact value of the operating wavelength near the Raman gain maximum was varied. To the best of our knowledge, this is the first study of the impact of a Raman gain spectral profile on the power, spectrum and beam quality parameter M 2 of multimode Raman laser. It appears that they very much dependent on the spectral region of Raman gain at which we work, when the wavelength is selected by a fiber Bragg grating inscribed in a multimode GRIN fiber.
KW - fiber Bragg grating
KW - fiber optics
KW - graded-index fiber
KW - laser diode pumping
KW - Raman gain spectrum
KW - Raman laser
KW - GEO2
KW - CW
KW - OPTICAL-FIBERS
KW - DIODE
KW - MULTIMODE
UR - http://www.scopus.com/inward/record.url?scp=85051403756&partnerID=8YFLogxK
U2 - 10.1088/1612-202X/aacca7
DO - 10.1088/1612-202X/aacca7
M3 - Article
AN - SCOPUS:85051403756
VL - 15
JO - Laser Physics Letters
JF - Laser Physics Letters
SN - 1612-2011
IS - 9
M1 - 095101
ER -
ID: 16004989