Whispering Gallery Mode Resonator Stabilized Narrow Linewidth Fiber Loop Laser

TL;DR

This paper presents a narrow linewidth fiber loop laser stabilized by a microsphere, achieving 170 kHz linewidth and demonstrating power and wavelength tuning with pump power, with potential applications discussed.

Contribution

The work introduces a stabilized fiber loop laser using a microsphere as a frequency selective element, achieving narrow linewidth and tunability.

Findings

Lasing linewidth of 170 kHz achieved

Output power increases linearly with pump power

Lasing mode exhibits a red-shift with pump power

Abstract

We demonstrate a narrow line, fiber loop laser using Erbium-doped fiber as the 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 red-shift of the lasing mode were also observed with increasing pump power. Its potential application is also discussed.