Modeling Er/Yb fiber lasers at high powers
Abstract
Conventional models of Er/Yb co-doped fibers assume all ytterbium ions are equally involved in the energy transfer with erbium ions, governed by a singular transfer rate. This would predict output power clamping once ytterbium parasitic lasing starts, contrary to the observations that the output continued to grow albeit at a slower rate. One study explained this using elevated temperature at high powers. Our study, however, shows that elevated temperature and mode-dependent effects only play insignificant roles. A new model is developed based on the existence of isolated ytterbium ions, which can explain all the observed experimental behaviors.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 13, 2020
- Source ID
- 10.1364/oe.393853
Entities
People
- Johan Nilsson
- Liang Dong
- Monica T. Kalichevsky-dong
- Turghun Matniyaz
- Yoonchan Jeong
Organizations
- Army Research Office