Phase-locked, erbium-fiber-laser-based frequency comb in the near infrared.
A phase-locked frequency comb in the near infrared is demonstrated with a mode-locked, erbium-doped, fiber laser whose output is amplified and spectrally broadened in dispersion-flattened, highly nonlinear optical fiber to span from 1100 to >2200 nm. The supercontinuum output comprises a frequency comb with a spacing set by the laser repetition rate and an offset by the carrier-envelope offset frequency, which is detected with the standard f-to-2f heterodyne technique. The comb spacing and offset frequency are phase locked to a stable rf signal with a fiber stretcher in the laser cavity and by control of the pump laser power, respectively. This infrared comb permits frequency metrology experiments in the near infrared in a compact, fiber-laser-based system.
Washburn
Brian R
BR
National Institute of Standards and Technology, 325 Broadway, Boulder, Colorado 80305, USA. brianw@boulder.nist.gov
Diddams
Scott A
SA
Newbury
Nathan R
NR
Nicholson
Jeffrey W
JW
Yan
Man F
MF
Jørgensen
Carsten G
CG