Mid-infrared diamond Raman laser with tuneable output

Alexander Sabella*, James A. Piper, Richard P. Mildren

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

4 Citations (Scopus)
9 Downloads (Pure)

Abstract

We present an OPO pumped mid IR diamond Raman laser with tuneable output from 3.49 μm to 3.78 μm, which to our knowledge is the longest wavelength produced in a solid state Raman laser. Up to 59 μJ is generated with a conversion efficiency of 10%. We also determine the Raman gain coefficient of diamond at 1.864 μm through measurement of the amplification of a seed signal. With pump and probe polarisations aligned with the <110< crystal axes a value of 4.8 cm/GW is measured, which corresponds to 6.4 cm/GW for polarisation aligned with the <111< crystal axes. Achievable conversion efficiencies were limited by multi-phonon absorption at the Stokes wavelength. Numerical modelling shows that increasing the output coupling factor of the cavity reduces the impact of multi-phonon absorption and leads to higher conversion efficiencies. By reducing the output coupler reflectivity from 55% to 5% and eliminating Fresnel reflections from cavity components, 30% conversion efficiency (44% quantum conversion efficiency) is predicted.

Original languageEnglish
Title of host publicationSolid State Lasers XXIII: Technology and Devices
EditorsW. Andrew Clarkson, Ramesh K. Shori
Place of PublicationWashington, DC
PublisherSPIE
Pages1-6
Number of pages6
Volume8959
ISBN (Print)9780819498724
DOIs
Publication statusPublished - 2014
EventSolid State Lasers XXIII: Technology and Devices - San Francisco, CA, United States
Duration: 2 Feb 20144 Feb 2014

Other

OtherSolid State Lasers XXIII: Technology and Devices
CountryUnited States
CitySan Francisco, CA
Period2/02/144/02/14

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