Tolerant low-loss three-lens coupling system for 1.48-um unstable-cavity lasers

Francois Boubal; Sylvie Delepine; Paul Salet; Franck Gerard; David Cornec; Michel Di Maggio; Michel Goix; Jean-Pierre Chardon; Emmanuel Grard

doi:10.1117/12.380543

29 March 2000 Tolerant low-loss three-lens coupling system for 1.48-μm unstable-cavity lasers

Francois Boubal, Sylvie Delepine, Paul Salet, Franck Gerard, David Cornec, Michel Di Maggio, Michel Goix, Jean-Pierre Chardon, Emmanuel Grard

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Proceedings Volume 3945, Laser Diodes and LEDs in Industrial, Measurement, Imaging, and Sensors Applications II; Testing, Packaging, and Reliability of Semiconductor Lasers V; (2000) https://doi.org/10.1117/12.380543
Event: Symposium on Integrated Optoelectronics, 2000, San Jose, CA, United States

Abstract

A 1.48-micrometer unstable-cavity laser is coupled into a single-mode fiber using three microlenses. Reproducible coupling of very high power is demonstrated with different types of lenses (plano-convex or bi-convex, with different apertures). Over 550 mW in single-mode fiber were reproducibly reached; to our knowledge, it is the highest power coupled into a single-mode fiber from a single semiconductor laser at this wavelength. Tolerance measurements on all of the coupling elements of a three-lens system are reported for the first time; an unexpected very large tolerance on the axial displacement of the second lens was measured. Results and interpretation with the aid of Gaussian and aberration simulations are also presented. Finally, we report on the first realization of a module with 46% chip to fiber coupling efficiency.

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Francois Boubal, Sylvie Delepine, Paul Salet, Franck Gerard, David Cornec, Michel Di Maggio, Michel Goix, Jean-Pierre Chardon, and Emmanuel Grard "Tolerant low-loss three-lens coupling system for 1.48-μm unstable-cavity lasers", Proc. SPIE 3945, Laser Diodes and LEDs in Industrial, Measurement, Imaging, and Sensors Applications II; Testing, Packaging, and Reliability of Semiconductor Lasers V, (29 March 2000); https://doi.org/10.1117/12.380543

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KEYWORDS

Tolerancing

Single mode fibers

Monochromatic aberrations

Laser vision correction

Lenses

Collimation

Fiber coupled lasers

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