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Approach to achieving a CEO-locked frequency comb with 25-GHz mode spacing at telecommunications wavelengths

Event Date: June 17, 2013
Speaker: Atsushi Ishizawa
Speaker Affiliation: Quantum Optical Physics Research Group,
NTT Basic Research Laboratories
Time: 10:00 AM
Location: MSEE 239

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.