Whispering-gallery-mode-resonator-stabilized narrow-linewidth fiber loop laser


We demonstrate a narrow-line fiber loop laser using erbium-doped fiber as gain material, stabilized by using a microsphere as a transmissive frequency selective element. Stable lasing with a linewidth of 170 kHz is observed, limited by the experimental spectral resolution. A linear increase in output power and a redshift of the lasing mode were also observed with increasing pump power. Its potential applications are discussed.

Optics Letters
Harald G. L. Schwefel
Harald G. L. Schwefel
Associate Professor

I work on Resonant Optics.