Open AccessMidinfrared frequency comb by difference frequency of erbium and thulium fiber lasers in orientation-patterned gallium phosphide
Author(s) -
Kevin F. Lee,
Christopher J. Hensley,
Peter G. Schunemann,
M. E. Fermann
Publication year - 2017
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.25.017411
Subject(s) - materials science , optics , gallium phosphide , thulium , fiber laser , frequency comb , erbium , optoelectronics , laser , wavelength , physics , doping
We generate over 60 mW of pulses with wavelengths from 6 to 11 micrometers by difference frequency mixing between erbium and thulium fiber amplifiers in orientation-patterned GaP with a photon conversion efficiency of 0.2. By stabilizing the repetition rate of the shared oscillator and adding a frequency shifter to one arm, the output becomes a frequency comb with tunable carrier envelope offset.