title: 1.6-W self-referenced frequency comb at 2.06 μm using a Ho:YLF multipass amplifier.
abstract: A high-power optical frequency comb at 2.06 μm has been generated using a Ho:YLF multipass amplifier seeded by the long wavelength supercontinuum tail of an octave-spanning Er:fiber comb source. The Ho:YLF amplifier showed a net gain larger than 30 dB from 2048 to 2068 nm, allowing the generation of a 20 nm bandwidth comb with a mode spacing of 100 MHz and a power per mode ranging from 20 to 370 μW. In the time domain, the amplified comb corresponds to a pulse train with 1.6 W total power and 508 fs transform-limited pulse duration. Using a self-referencing f-2f interferometer and a phase-locking loop, spectral narrowing of the offset frequency down to less than 17 Hz has been achieved.
authors.affiliation: Dipartimento di Fisica-Politecnico di Milano and Istituto di Fotonica e Nanotecnologie-CNR, Piazza Leonardo da Vinci 32, 20133 Milano, Italy. nicola.coluccelli@polimi.it
authors.forename: Nicola
authors.initials: N
authors.lastname: Coluccelli
authors.forename: Alessio
authors.initials: A
authors.lastname: Gambetta
authors.forename: Davide
authors.initials: D
authors.lastname: Gatti
authors.forename: Marco
authors.initials: M
authors.lastname: Marangoni
authors.forename: Alberto
authors.initials: A
authors.lastname: Di Lieto
authors.forename: Mauro
authors.initials: M
authors.lastname: Tonelli
authors.forename: Gianluca
authors.initials: G
authors.lastname: Galzerano
authors.forename: Paolo
authors.initials: P
authors.lastname: Laporta