Bottle microresonator broadband and low repetition rate frequency comb generator

Abstract

We propose a new type of broadband and low repetition rate frequency comb generator which has the shape of an elongated and nanoscale-shallow optical bottle microresonator created at the surface of an optical fiber. The free spectral range (FSR) of the broadband azimuthal eigenfrequency series of this resonator is the exact multiple of the FSR of the dense and narrowband axial series. The effective radius variation of the microresonator is close to a parabola with a nanoscale height which is greater or equal to lambda/2pi*n0 (here lambda is the characteristic radiation wavelength and n0 is the refractive index of the microresonator material). Overall, the microresonator possesses a broadband, small FSR, and accurately equidistant spectrum convenient for the generation of a broadband and low repetition rate optical frequency comb. It is shown that this comb can be generated by pumping with a cw laser, which radiation frequency matches a single axial eigenfrequency of the microresonator, or, alternatively, by pumping with a mode-locked laser, which generates a narrowband low repetition rate comb matching a series of equidistant axial eigenfrequencies situated between adjacent azimuthal eigenfrequencies.

arXiv comment4 pages

References in corpus (10)

• Optical frequency comb generation from a monolithic microresonator
• Mid-infrared frequency combs
• Optical combs with a crystalline whispering gallery mode resonator
• Low-Pump-Power, Low-Phase-Noise, and Microwave to Millimeter-wave Repetition Rate Operation in Microcombs
• Delay of light in an optical bottle resonator with nanoscale radius variation: dispersionless, broadband, and low-loss
• Microtorus: a High Finesse Microcavity with Whispering-Gallery Modes
• Surface nanoscale axial photonics: Robust fabrication of high quality factor microresonators
• Permanent matching of coupled optical bottle resonators with better than 0.16 GHz precision
• Fabrication of surface nanoscale axial photonics (SNAP) structures with a femtosecond laser
• Measurement of microresonator frequency comb stability by spectral interferometry

Cited by in corpus (7)

• Optical bottle microresonators
• Frequency comb generation in SNAP bottle resonators
• Two-dimensional nonlinear modes and frequency combs in bottle microresonators
• Microresonator devices lithographically introduced at the optical fiber surface
• Multiple nonlinear resonances and frequency combs in bottle microresonators
• Theory of nonlinear whispering gallery mode dynamics in a cylindrical microresonator with a radius variation
• Discovery of Parabolic Microresonators Produced via Fiber Tapering