Yb-doped large mode area fibers with depressed clad and dopant confinement

Vincent Roy; Claude Paré; Pierre Laperle; Louis Desbiens; Yves Taillon

doi:10.1117/12.2212770

5 April 2016 Yb-doped large mode area fibers with depressed clad and dopant confinement

Vincent Roy, Claude Paré, Pierre Laperle, Louis Desbiens, Yves Taillon

Proceedings Volume 9728, Fiber Lasers XIII: Technology, Systems, and Applications; 97281W (2016) https://doi.org/10.1117/12.2212770
Event: SPIE LASE, 2016, San Francisco, California, United States

Abstract

Large mode area fibers with depressed-index cladding layer and confinement of rare-earth dopants can provide effective suppression of high-order modes. A polarization-maintaining Yb-doped double-clad fiber with 35/250 μm core/clad diameter has been fabricated from conventional methods according to this design. The fiber which has an effective mode area close to 500 μm² yields near diffraction-limited output with beam quality factor M² close to 1.1 when tested as a power amplifier with a coherent seed light source. Beam pointing measurements provide further evidence for near single-mode behavior as the pointing fluctuations are shown to be negligible once the fiber is coiled to a given diameter.

Citation Download Citation

Vincent Roy, Claude Paré, Pierre Laperle, Louis Desbiens, and Yves Taillon "Yb-doped large mode area fibers with depressed clad and dopant confinement", Proc. SPIE 9728, Fiber Lasers XIII: Technology, Systems, and Applications, 97281W (5 April 2016); https://doi.org/10.1117/12.2212770

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