Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Random Raman Lasing in Diode-Pumped Multi-Mode Graded-Index Fiber with Femtosecond Laser-Inscribed Random Refractive Index Structures of Various Shapes. / Kuznetsov, Alexey G.; Munkueva, Zhibzema E.; Dostovalov, Alexandr V. и др.
в: Photonics, Том 11, № 10, 981, 18.10.2024.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Random Raman Lasing in Diode-Pumped Multi-Mode Graded-Index Fiber with Femtosecond Laser-Inscribed Random Refractive Index Structures of Various Shapes
AU - Kuznetsov, Alexey G.
AU - Munkueva, Zhibzema E.
AU - Dostovalov, Alexandr V.
AU - Kokhanovskiy, Alexey Y.
AU - Elizarova, Polina A.
AU - Nemov, Ilya N.
AU - Revyakin, Alexandr A.
AU - Kharenko, Denis S.
AU - Babin, Sergey A.
N1 - This research was funded by the RUSSIAN SCIENCE FOUNDATION, grant number 21-72-30024.
PY - 2024/10/18
Y1 - 2024/10/18
N2 - Diode-pumped multi-mode graded-index (GRIN) fiber Raman lasers provide prominent brightness enhancement both in linear and half-open cavities with random distributed feedback via natural Rayleigh backscattering. Femtosecond laser-inscribed random refractive index structures allow for the sufficient reduction in the Raman threshold by means of Rayleigh backscattering signal enhancement by +50 + 66 dB relative to the intrinsic fiber level. At the same time, they offer an opportunity to generate Stokes beams with a shape close to fundamental transverse mode (LP01), as well as to select higher-order modes such as LP11 with a near-1D longitudinal random structure shifted off the fiber axis. Further development of the inscription technology includes the fabrication of 3D ring-shaped random structures using a spatial light modulator (SLM) in a 100/140 μm GRIN multi-mode fiber. This allows for the generation of a multi-mode diode-pumped GRIN fiber random Raman laser at 976 nm with a ring-shaped output beam at a relatively low pumping threshold (~160 W), demonstrated for the first time to our knowledge.
AB - Diode-pumped multi-mode graded-index (GRIN) fiber Raman lasers provide prominent brightness enhancement both in linear and half-open cavities with random distributed feedback via natural Rayleigh backscattering. Femtosecond laser-inscribed random refractive index structures allow for the sufficient reduction in the Raman threshold by means of Rayleigh backscattering signal enhancement by +50 + 66 dB relative to the intrinsic fiber level. At the same time, they offer an opportunity to generate Stokes beams with a shape close to fundamental transverse mode (LP01), as well as to select higher-order modes such as LP11 with a near-1D longitudinal random structure shifted off the fiber axis. Further development of the inscription technology includes the fabrication of 3D ring-shaped random structures using a spatial light modulator (SLM) in a 100/140 μm GRIN multi-mode fiber. This allows for the generation of a multi-mode diode-pumped GRIN fiber random Raman laser at 976 nm with a ring-shaped output beam at a relatively low pumping threshold (~160 W), demonstrated for the first time to our knowledge.
KW - LD pumping
KW - Raman laser
KW - Rayleigh backscattering
KW - beam shape
KW - fs laser inscription
KW - graded-index fiber
KW - multi-mode
KW - random structures
KW - spatial light modulator
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85207670322&origin=inward&txGid=b60ea5e9870fa651a6b5c3227307e231
UR - https://www.mendeley.com/catalogue/fa3425dc-3b31-37df-9036-f450be3fb1ae/
U2 - 10.3390/photonics11100981
DO - 10.3390/photonics11100981
M3 - Article
VL - 11
JO - Photonics
JF - Photonics
SN - 2304-6732
IS - 10
M1 - 981
ER -
ID: 60782916