Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
Cascaded Raman lasing in a multimode diode-pumped graded-index fiber. / Kuznetsov, Alexey G.; Nemov, Ilya N.; Wolf, Alexey A. et al.
Nonlinear Frequency Generation and Conversion: Materials and Devices XXI. ed. / Peter G. Schunemann; Valentin Petrov. SPIE, 2022. 1198504 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 11985).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
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TY - GEN
T1 - Cascaded Raman lasing in a multimode diode-pumped graded-index fiber
AU - Kuznetsov, Alexey G.
AU - Nemov, Ilya N.
AU - Wolf, Alexey A.
AU - Kablukov, Sergey I.
AU - Babin, Sergey A.
N1 - Funding Information: The study is supported by Russian Science Foundation (№21-42-00019). Publisher Copyright: © SPIE.
PY - 2022/3/4
Y1 - 2022/3/4
N2 - Graded-index fibers enable efficient Raman conversion of multimode radiation into a Stokes beam with improved beam quality offering new approach for high-brightness diode-pumped all-fiber tunable lasers. Here we study an opportunity to broaden the operating wavelength range via cascaded Raman lasing in such scheme. Highly-multimode 940-nm laserdiode radiation is serially converted into the 1st(976nm), 2nd(1019nm) and 3rd(1065 nm) order Stokes beam. At the conversion the beam quality is greatly improved approaching diffraction limit (M2<1.4). Linear and half-open cavities are compared showing that the conversion efficiency is higher for half-open cavity, whereas the threshold is lower for linear cavity that was used for the 3rd -order generation. Generation of 3rd Stokes order is accompanied by unstable pulsations with higher (4th and 5th) orders involved in the lasing with total power of ∼4 W, while its beam quality worsens to M2∼2.
AB - Graded-index fibers enable efficient Raman conversion of multimode radiation into a Stokes beam with improved beam quality offering new approach for high-brightness diode-pumped all-fiber tunable lasers. Here we study an opportunity to broaden the operating wavelength range via cascaded Raman lasing in such scheme. Highly-multimode 940-nm laserdiode radiation is serially converted into the 1st(976nm), 2nd(1019nm) and 3rd(1065 nm) order Stokes beam. At the conversion the beam quality is greatly improved approaching diffraction limit (M2<1.4). Linear and half-open cavities are compared showing that the conversion efficiency is higher for half-open cavity, whereas the threshold is lower for linear cavity that was used for the 3rd -order generation. Generation of 3rd Stokes order is accompanied by unstable pulsations with higher (4th and 5th) orders involved in the lasing with total power of ∼4 W, while its beam quality worsens to M2∼2.
KW - beam clean-up
KW - diode pumping
KW - FBG
KW - fiber laser
KW - graded-index fiber
KW - mode selection
KW - multimode
KW - pump depletion
KW - Raman laser
KW - random coupling
UR - http://www.scopus.com/inward/record.url?scp=85131327442&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/85e4e083-4d6b-36c2-91b9-25a73aff6fe0/
U2 - 10.1117/12.2610384
DO - 10.1117/12.2610384
M3 - Conference contribution
AN - SCOPUS:85131327442
T3 - Proceedings of SPIE - The International Society for Optical Engineering
BT - Nonlinear Frequency Generation and Conversion
A2 - Schunemann, Peter G.
A2 - Petrov, Valentin
PB - SPIE
T2 - Nonlinear Frequency Generation and Conversion: Materials and Devices XXI 2022
Y2 - 20 February 2022 through 27 February 2022
ER -
ID: 36435484