Approach to achieving a CEO-locked frequency comb with 25-GHz mode spacing at telecommunications wavelengths
|Event Date:||June 17, 2013|
|Speaker Affiliation:||Quantum Optical Physics Research Group,
NTT Basic Research Laboratories
Proposed is an approach to achieving a carrier-envelope-offset (CEO)- locked frequency comb with 25 GHz mode spacing in the telecommunications wavelength region. To achieve the approach, a 250 fs laser pulse train at a 25 GHz repetition rate was developed by intensity- and phase-modulating a seed light emitted from a continuous-wave laser diode and propagating it through a dispersive fiber. Using the authors’ developed tellurite photonics crystal fibre with a high nonlinear coefficient, octave-spanning super continuum generation in the 1.5 mm band from a 250 MHz gated pulse train for CEO frequency detection was demonstrated.