kW-level monolithic single-mode narrow-linewidth all-solid photonic bandgap fiber amplifier

Benjamin Pulford; Roger Holten; Turghun Matniyaz; Monica T. Kalichevsky-Dong; Thomas W. Hawkins; Liang Dong

doi:10.1117/12.2603805

4 March 2022 kW-level monolithic single-mode narrow-linewidth all-solid photonic bandgap fiber amplifier

Benjamin Pulford, Roger Holten, Turghun Matniyaz, Monica T. Kalichevsky-Dong, Thomas W. Hawkins, Liang Dong

Proceedings Volume 11981, Fiber Lasers XIX: Technology and Systems; 119810O (2022) https://doi.org/10.1117/12.2603805
Event: SPIE LASE, 2022, San Francisco, California, United States

Abstract

Further power scaling of narrow-linewidth fiber lasers is critical for beam combining. Using allsolid photonic bandgap fibers with large effective mode area and strong higher-order-mode suppression is an interesting approach. Previously we demonstrated ~400 W single-frequency single-mode power at 1064 nm from a 50/400 photonic bandgap fiber amplifier, limited only by TMI. In this work, we demonstrate a TMIlimited single-mode power of 1.37 kW from a monolithic fiber amplifier with a 25/400 photonic bandgap fiber, the highest output power from a photonic bandgap fiber demonstrated to date. The spectral linewidth is broadened to ~8 GHz to suppress stimulated Brillouin scattering.

Conference Presentation

Citation Download Citation

Benjamin Pulford, Roger Holten, Turghun Matniyaz, Monica T. Kalichevsky-Dong, Thomas W. Hawkins, and Liang Dong "kW-level monolithic single-mode narrow-linewidth all-solid photonic bandgap fiber amplifier", Proc. SPIE 11981, Fiber Lasers XIX: Technology and Systems, 119810O (4 March 2022); https://doi.org/10.1117/12.2603805

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