High power frequency comb based on mid-infrared quantum cascade laser at λ ∼ 9 μm

We investigate a frequency comb source based on a mid-infrared quantum cascade laser at λ ∼ 9 μm with high power output. A broad flat-top gain with near-zero group velocity dispersion has been engineered using a dual-core active region structure. This favors the locking of the dispersed Fabry-Perot modes into equally spaced frequency lines via four wave mixing. A current range with a narrow intermode beating linewidth of 3 kHz is identified with a fast detector and spectrum analyzer. This range corresponds to a broad spectral coverage of 65 cm−1 and a high power output of 180 mW for ∼176 comb modes.

[1]  Govind P. Agrawal,et al.  Highly nondegenerate four‐wave mixing in semiconductor lasers due to spectral hole burning , 1987 .

[2]  Federico Capasso,et al.  Mode-locked pulses from mid-infrared quantum cascade lasers. , 2009, Optics express.

[3]  Jerome Faist,et al.  Dual-comb spectroscopy based on quantum-cascade-laser frequency combs , 2014, Nature Communications.

[4]  Qing Hu,et al.  Terahertz laser frequency combs , 2014 .

[5]  Albert Schliesser,et al.  Mid-infrared frequency combs , 2012, Nature Photonics.

[6]  T. Kippenberg,et al.  Optical frequency comb generation from a monolithic microresonator , 2007, Nature.

[7]  Manijeh Razeghi,et al.  Continuous operation of a monolithic semiconductor terahertz source at room temperature , 2014 .

[8]  Cho,et al.  Giant, triply resonant, third-order nonlinear susceptibility chi 3 omega (3) in coupled quantum wells. , 1992, Physical review letters.

[9]  Markus W. Sigrist,et al.  Mid-IR Difference Frequency Generation , 2003 .

[10]  J. Faist,et al.  Mid-infrared frequency comb based on a quantum cascade laser , 2012, Nature.

[11]  Federico Capasso,et al.  Stable mode-locked pulses from mid-infrared semiconductor lasers , 2009, 0903.4385.

[12]  T. Hänsch,et al.  Optical frequency metrology , 2002, Nature.

[13]  Peter Friedli,et al.  Four-wave mixing in a quantum cascade laser amplifier , 2013 .

[14]  M. Razeghi,et al.  High-Performance InP-Based Mid-IR Quantum Cascade Lasers , 2009, IEEE Journal of Selected Topics in Quantum Electronics.

[15]  Carlo Sirtori,et al.  Coherent sampling of active mode-locked terahertz quantum cascade lasers and frequency synthesis , 2011 .

[16]  Manijeh Razeghi,et al.  Room temperature terahertz quantum cascade laser sources with 215 μW output power through epilayer-down mounting , 2013 .

[17]  Derryck T. Reid,et al.  Frequency comb generation and carrier-envelope phase control in femtosecond optical parametric oscillators , 2008 .

[18]  James G. Fujimoto,et al.  Ultrabroadband double-chirped mirror pairs for generation of octave spectra , 2001 .

[19]  Ingmar Hartl,et al.  Widely-tunable mid-infrared frequency comb source based on difference frequency generation. , 2012, Optics letters.