title: Impact of dispersion on amplitude and frequency noise in a Yb-fiber laser comb.
abstract: We describe a Yb-fiber-based laser comb, with a focus on the relationship between the net-cavity dispersion and frequency noise on the comb. While tuning the net-cavity dispersion from anomalous to normal, we measure the relative intensity noise, offset frequency (f(CEO)) linewidth, and the resulting frequency noise spectrum on the f(CEO). We find that the laser operating at zero net-cavity dispersion has many advantages, including an approximately 100× reduction in free-running f(CEO) linewidth and frequency noise power spectral density when compared to the normal-dispersion regime. At the zero-dispersion point, we demonstrate a phase-locked f(CEO) beat with low residual noise.
authors.affiliation: National Institute of Standards and Technology, Time and Frequency Division, Mail Stop 847, 325 Broadway, Boulder, Colorado 80305, USA. LNG@boulder.nist.gov
authors.forename: Lora
authors.initials: L
authors.lastname: Nugent-Glandorf
authors.forename: Todd A
authors.initials: TA
authors.lastname: Johnson
authors.forename: Yohei
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: Scott A
authors.initials: SA
authors.lastname: Diddams