Optical Frequency Comb Generation in a Cylindrical Whispering Gallery Mode Microresonator

Abstract

This work demonstrates optical frequency comb generation in a cylindrical whispering-gallery mode microresonator fabricated on the surface of an optical fiber. The optimization of the microresonator shape, mode volume, and coupling strength between the excitation element and the microresonator enabled the achievement of a record loaded quality factor of 10⁸ for this type of microresonator, as well as parametric nonlinear generation at a pump power of 40 mW.