27 February 2014 Optical fiber microstructuration for strengthening single-mode laser operation in high power regime
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Abstract
We propose an in-depth investigation of all-solid microstructured optical fibers for the development of very large mode area (VLMA) fiber lasers. The inner cladding microstructure of these VLMA fibers is carefully optimized in order to get a robust single-mode laser operation in the high power regime. We describe the numerical approach used to devise a novel kind of fiber structures, the core of which should be larger than 50 μm while showing an improved single-mode emission compared to that of the state-of-the-art large pitch fibers. With the aim of overpassing the limitations of chemical vapor deposition techniques, we opted for a manufacturing process called Repusil, based on the sintering and vitrification of doped powders. Then, our opto-geometrical considerations result from the optical properties offered by this method and the use of the stack and draw. Finally, we present our very first fabrication for the proposed all-solid microstructured fibers in which a laser emission of 52 W in a continuous wave regime was obtained.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Aurélien Benoit, Aurélien Benoit, Romain Dauliat, Romain Dauliat, Kay Schuster, Kay Schuster, Stephan Grimm, Stephan Grimm, Raphaël Jamier, Raphaël Jamier, François Salin, François Salin, Philippe Roy, Philippe Roy, } "Optical fiber microstructuration for strengthening single-mode laser operation in high power regime," Optical Engineering 53(7), 071817 (27 February 2014). https://doi.org/10.1117/1.OE.53.7.071817 . Submission:
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