Improved optical fibers for enhanced coupling with high-power diode lasers

Bolesh J. Skutnik; Brian Foley

doi:10.1117/12.529523

1 June 2004 Improved optical fibers for enhanced coupling with high-power diode lasers

Bolesh J. Skutnik, Brian Foley

Proceedings Volume 5336, High-Power Diode Laser Technology and Applications II; (2004) https://doi.org/10.1117/12.529523
Event: Lasers and Applications in Science and Engineering, 2004, San Jose, Ca, United States

Abstract

A major problem with coupling high power diode lasers into optical fibers is the counter effects of requiring a synthetic silica core for its energy carrying capacity but needing also high numerical aperture and/or core size to capture the highly diverging fast axis light. Coupling the output of diode arrays efficiently and for maximum brightness retention involves additional problems, some of which are discussed. A possible solution to these probelms is having the availability of higher numerical aperture [NA] fibers based primarily on a silica core and silica cladding. New deposition techniques have permitted the formation of preforms leading to fibers with pure silica cores which have an NA of 0.30 versus the standard 0.22 value. Further new structures and approaches to the problem have lead to optical fibers with a doped silica core having an NA above 0.50. Properties of these fibers are presented along with advantages they have for improving coupling high power diode lasers and also some newer concepts for improving retention of high brightness output from such laser systems.

Citation Download Citation

Bolesh J. Skutnik and Brian Foley "Improved optical fibers for enhanced coupling with high-power diode lasers", Proc. SPIE 5336, High-Power Diode Laser Technology and Applications II, (1 June 2004); https://doi.org/10.1117/12.529523

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