1. Pump slope-improved fiber-ring laser by recycling the residual pumping power
- Author
-
G. S. Jhong, Yu. S. Tver’yanovich, Alina Manshina, Shien-Kuei Liaw, T. Yu. Ivanova, and K. L. Hong
- Subjects
Materials science ,Optical fiber ,business.industry ,Slope efficiency ,Physics::Optics ,Condensed Matter Physics ,Laser ,Industrial and Manufacturing Engineering ,Atomic and Molecular Physics, and Optics ,law.invention ,Optics ,law ,Fiber laser ,Fiber ,Laser power scaling ,business ,Instrumentation ,Diffraction grating ,Lasing threshold - Abstract
We investigate an improvement in the pump slope efficiency for an erbium-doped fiber-ring laser. The method is based on the residual pump power reused by means of a fiber mirror. Under the conditions of a 4-m erbium-doped fiber (EDF), 10 mW of pump power, and a 99% reflectivity of a fiber-Bragg grating, the pump slope efficiency may reach 19.70% compared to 15.37% for a conventional fiber-ring laser. The maximum lasing power is increased from 14.6 to 18.7 mW corresponding to a 1.07-dB lasing power enhancement. The side-mode suppression ratio is as high as 67.6 dB with a line width of less than 0.05 nm.
- Published
- 2008