title: Frequency comb from a microresonator with engineered spectrum.
abstract: We demonstrate that by varying the ratio between the linewidth and dispersion of a whispering gallery mode resonator we are able to control the number N of free spectral ranges separating the first generated comb sidebands from the pump. We observed combs with N = 19 and N = 1. For the comb with N = 1 we have achieved a span of over 200 nm using a 0.4 mm MgF₂ resonator pumped with 50 mW at 1560 nm. This pump power is a factor of 10 lower than previously reported for combs with comparable bandwidth.
authors.affiliation: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, California 91109-8099, USA. grudinin@jpl.nasa.gov
authors.forename: Ivan S
authors.initials: IS
authors.lastname: Grudinin
authors.forename: Lukas
authors.initials: L
authors.lastname: Baumgartel
authors.forename: Nan
authors.initials: N
authors.lastname: Yu
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D055617:Micro-Electrical-Mechanical Systems / Q000295:instrumentation*; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D014159:Transducers; D014732:Vibration