Yb fiber vortex laser using an interferometric mode converting output coupler

Jan W. T. Geberbauer; Robert T. Murray; Timothy H. Runcorn; William R. Kerridge-Johns

doi:10.1117/12.2650889

8 March 2023 Yb fiber vortex laser using an interferometric mode converting output coupler

Jan W. T. Geberbauer, Robert T. Murray, Timothy H. Runcorn, William R. Kerridge-Johns

Proceedings Volume 12399, Solid State Lasers XXXII: Technology and Devices; 1239905 (2023) https://doi.org/10.1117/12.2650889
Event: SPIE LASE, 2023, San Francisco, California, United States

Abstract

We apply mode transformation to an Yb fiber laser for direct generation of a first order vortex mode (LG₀₁), yielding LG₀₁ power of 5W at 96 % purity (from modal decomposition) with 16W pumping. The laser used standard single mode Yb doped fibers operating at 1064 nm. A free-space Sagnac interferometer formed one reflector of the cavity by feeding back the internal Gaussian mode of the fiber laser and output coupling a LG₀₁ via interferometric mode transformation. It was stable over hours of operation and days of inactivity, and was insensitive to polarisation. The maximum output power was only limited through heating of a optical element, which could be mitigated with thermal management. We also show that additional spiral phase plates (SPPs) are a route to higher purity, higher order vortex modes than with SPPs alone due to improved intensity matching between LG₀₁ and higher order states.

Conference Presentation

Citation Download Citation

Jan W. T. Geberbauer, Robert T. Murray, Timothy H. Runcorn, and William R. Kerridge-Johns "Yb fiber vortex laser using an interferometric mode converting output coupler", Proc. SPIE 12399, Solid State Lasers XXXII: Technology and Devices, 1239905 (8 March 2023); https://doi.org/10.1117/12.2650889

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available