Abstract
A high-power diode laser bar coupling scheme with rectangular optical fibers is proposed, and the concept is tested on a scale version: an individual diode laser array and a single rectangular fiber. 60% of the power from a 1-W cw, 213-µm-wide 20-stripe diode array is coupled into a 216 µm × 28 µm 0.66 numerical aperture optical fiber, which produces intensities at the fiber output face of 9.9 kW cm(-2). The elliptical, dual-lobed far-field intensity pattern of the diode laser output, with divergence of 39° × 13° FWHM is converted on passing through the fiber into a single-lobed, nearly circular pattern with a FWHM divergence of 21° × 22°. The beam quality is reduced by only a factor of 30 when this coupling method is used. Alignment tolerances in the three planes of movement are measured and found to be in excess of 10 µm.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.