Higher Order Mode Selection For Power Scaling In Laser Resonators Using Transmitting Bragg Gratings

Keywords

higher order mode; mode conversion; mode selection; Multiplexed VBG; PTR; ribbon fiber

Abstract

Power scaling using a higher order mode in a ribbon fiber has previously been proposed. However, methods of selecting the higher order mode and converting to a single lobe high brightness beam are needed. We propose using a multiplexed transmitting Bragg grating (MTBG) to convert a higher order mode into a single lobe beam. Using a ribbon fiber with core dimensions of 107.8 μm by 8.3 μm, we use the MTBG to select a higher order mode oscillating within the resonator with 51.4% efficiency, while simultaneously converting the higher order mode to a beam with diffraction limited divergence of 10.2 mrad containing 60% of the total power.

Publication Date

1-1-2015

Publication Title

Proceedings of SPIE - The International Society for Optical Engineering

Volume

9466

Issue

January

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/12.2177060

Socpus ID

84937219379 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84937219379

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