kW-level monolithic single-mode narrow-linewidth all-solid photonic bandgap fiber amplifier
Abstract
Further power scaling of narrow-linewidth fiber lasers is critical for beam combining. Using all-solid photonic bandgap fibers with large effective mode areas 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 transverse mode instability (TMI). In this work, we demonstrate a TMI-limited 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, to the best of our knowledge. The spectral linewidth is broadened to ∼ 8 G H z to suppress stimulated Brillouin scattering.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Sep 03, 2021
- Source ID
- 10.1364/ol.434879
Entities
People
- Benjamin Pulford
- Liang Dong
- Monica T. Kalichevsky-dong
- Roger Holten
- Thomas W. Hawkins
- Turghun Matniyaz
Organizations
- Air Force Research Laboratory
- Army Research Office
- Clemson University
- Leidos