Random Raman Lasing in Diode-Pumped Multi-Mode Graded-Index Fiber with Femtosecond Laser-Inscribed Random Refractive Index Structures of Various Shapes

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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. et al.

In: Photonics, Vol. 11, No. 10, 981, 18.10.2024.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{167c06265b934d02b7302de88f67c03e,

title = "Random Raman Lasing in Diode-Pumped Multi-Mode Graded-Index Fiber with Femtosecond Laser-Inscribed Random Refractive Index Structures of Various Shapes",

abstract = "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.",

keywords = "LD pumping, Raman laser, Rayleigh backscattering, beam shape, fs laser inscription, graded-index fiber, multi-mode, random structures, spatial light modulator",

author = "Kuznetsov, {Alexey G.} and Munkueva, {Zhibzema E.} and Dostovalov, {Alexandr V.} and Kokhanovskiy, {Alexey Y.} and Elizarova, {Polina A.} and Nemov, {Ilya N.} and Revyakin, {Alexandr A.} and Kharenko, {Denis S.} and Babin, {Sergey A.}",

note = "This research was funded by the RUSSIAN SCIENCE FOUNDATION, grant number 21-72-30024.",

year = "2024",

month = oct,

day = "18",

doi = "10.3390/photonics11100981",

language = "English",

volume = "11",

journal = "Photonics",

issn = "2304-6732",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "10",

}

RIS

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