Yb-doped large mode area tapered fiber with depressed cladding and dopant confinement

V. Roy; C. Paré; B. Labranche; P. Laperle; L. Desbiens; M. Boivin; Y. Taillon

doi:10.1117/12.2250864

22 February 2017 Yb-doped large mode area tapered fiber with depressed cladding and dopant confinement

V. Roy, C. Paré, B. Labranche, P. Laperle, L. Desbiens, M. Boivin, Y. Taillon

Proceedings Volume 10083, Fiber Lasers XIV: Technology and Systems; 1008314 (2017) https://doi.org/10.1117/12.2250864
Event: SPIE LASE, 2017, San Francisco, California, United States

Abstract

A polarization-maintaining Yb-doped large mode area fiber with depressed-index inner cladding layer and confinement of rare-earth dopants has been drawn as a long tapered fiber. The larger end features a core/clad diameter of 56/400 μm and core NA ~ 0.07, thus leading to an effective mode area over 1000 μm². The fiber was tested up to 100 W average power, with near diffraction-limited output as the beam quality M² was measured < 1.2. As effective single-mode guidance is enforced in the first section due to enhanced bending loss, subsequent adiabatic transition of the mode field in the taper section preserves single-mode amplification towards the larger end of the fiber.

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Citation Download Citation

V. Roy, C. Paré, B. Labranche, P. Laperle, L. Desbiens, M. Boivin, and Y. Taillon "Yb-doped large mode area tapered fiber with depressed cladding and dopant confinement", Proc. SPIE 10083, Fiber Lasers XIV: Technology and Systems, 1008314 (22 February 2017); https://doi.org/10.1117/12.2250864

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