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Off-peak dual-wavelength multimode diode-laser-pumped fiber Raman laser

Off-peak dual-wavelength multimode diode-laser-pumped fiber Raman laser
Off-peak dual-wavelength multimode diode-laser-pumped fiber Raman laser

We demonstrate a fiber Raman laser directly pumped by two spectrally combined multimode diode lasers at ~950 nm and ~976 nm. The emission wavelength becomes 1020 nm, which corresponds to the 1st Stokes of 976 nm. The pump separation of 270 cm-1 is both much smaller than the Raman peak shift of 440 cm-1 and much larger than the Raman linewidth of around 100 cm-1, which is unfavorable for efficient Raman conversion. Nevertheless, the addition of the pump at 950 nm triples the output power compared to pumping only at 976 nm. We reach 23 W of output power with slope efficiency of 51% and beam quality M2 of 5.2 in a germanosilicate graded-index fiber.

Brightness, Diode lasers, Fiber lasers, Fiber nonlinear optics, Laser excitation, Power generation, Pump lasers, Raman Lasers, Stimulated emission
1041-1135
1-4
Hong, Soonki
c762838f-90db-4594-9d1d-446279e59a30
Feng, Yutong
8257a816-5e4a-47bc-8aa2-e364c4d6e21e
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b
Hong, Soonki
c762838f-90db-4594-9d1d-446279e59a30
Feng, Yutong
8257a816-5e4a-47bc-8aa2-e364c4d6e21e
Nilsson, Johan
f41d0948-4ca9-4b93-b44d-680ca0bf157b

Hong, Soonki, Feng, Yutong and Nilsson, Johan (2018) Off-peak dual-wavelength multimode diode-laser-pumped fiber Raman laser. IEEE Photonics Technology Letters, 1-4. (doi:10.1109/LPT.2018.2863559).

Record type: Article

Abstract

We demonstrate a fiber Raman laser directly pumped by two spectrally combined multimode diode lasers at ~950 nm and ~976 nm. The emission wavelength becomes 1020 nm, which corresponds to the 1st Stokes of 976 nm. The pump separation of 270 cm-1 is both much smaller than the Raman peak shift of 440 cm-1 and much larger than the Raman linewidth of around 100 cm-1, which is unfavorable for efficient Raman conversion. Nevertheless, the addition of the pump at 950 nm triples the output power compared to pumping only at 976 nm. We reach 23 W of output power with slope efficiency of 51% and beam quality M2 of 5.2 in a germanosilicate graded-index fiber.

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More information

Accepted/In Press date: 3 August 2018
e-pub ahead of print date: 6 August 2018
Keywords: Brightness, Diode lasers, Fiber lasers, Fiber nonlinear optics, Laser excitation, Power generation, Pump lasers, Raman Lasers, Stimulated emission

Identifiers

Local EPrints ID: 423043
URI: http://eprints.soton.ac.uk/id/eprint/423043
ISSN: 1041-1135
PURE UUID: 05aad699-9841-4599-9e5b-8f40a56a6311
ORCID for Yutong Feng: ORCID iD orcid.org/0000-0002-6839-2106
ORCID for Johan Nilsson: ORCID iD orcid.org/0000-0003-1691-7959

Catalogue record

Date deposited: 13 Aug 2018 16:30
Last modified: 07 Oct 2020 08:01

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