Offset-free mid-infrared frequency comb based on a mode-locked semiconductor laser.

We demonstrate a carrier-envelope offset-free frequency comb in the mid-wavelength infrared (MWIR) based on a passively mode-locked vertical external cavity surface emitting laser (VECSEL) operating at a 1.6 GHz repetition rate. The 290 mW output spanning 3.0-3.5 μm is generated through difference frequency generation (DFG) in periodically poled lithium niobate. The VECSEL pulse train is centered at 1030 nm and amplified up to 11 W in a Yb fiber amplifier system. The output is split to generate a second pulse train at 1560 nm through nonlinear broadening in a Si3N4 waveguide followed by amplification in an Er gain fiber. DFG between the 1030 and 1560 nm pulse trains results in a coherent and offset-free MWIR frequency comb, verified with optical heterodyne beat note measurements. Active stabilization of the VECSEL repetition rate provides a fully stabilized high repetition rate frequency comb in the MWIR, uniquely suited for applications in molecular spectroscopy.

[1]  Alexander Klenner,et al.  All-optical Q-switching limiter for high-power gigahertz modelocked diode-pumped solid-state lasers. , 2015, Optics express.

[2]  Dominik Waldburger,et al.  High-power 100 fs semiconductor disk lasers , 2016 .

[3]  J. Biegert,et al.  Mid-infrared difference-frequency generation of ultrashort pulses tunable between 3.2 and 4.8 microm from a compact fiber source. , 2007, Optics letters.

[4]  Jun Ye,et al.  Phase-stabilized, 1.5 W frequency comb at 2.8-4.8 microm. , 2009, Optics letters.

[5]  Camille-Sophie Brès,et al.  Mid-infrared frequency comb via coherent dispersive wave generation in silicon nitride nanophotonic waveguides , 2018 .

[6]  Thomas K. Allison,et al.  Molecular fingerprinting with bright, broadband infrared frequency combs , 2018 .

[7]  I Hartl,et al.  Broadband phase noise suppression in a Yb-fiber frequency comb. , 2011, Optics letters.

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

[9]  Esther Baumann,et al.  High-coherence mid-infrared dual-comb spectroscopy spanning 2.6 to 5.2 μm , 2017, 1709.07105.

[10]  Takao Fuji,et al.  Controlling the carrier-envelope phase of ultrashort light pulses with optical parametric amplifiers. , 2002, Physical review letters.

[11]  Ian Coddington,et al.  Self-referenced frequency combs using high-efficiency silicon-nitride waveguides. , 2017, Optics letters.

[12]  Wayne Knox,et al.  Fiber-laser-based difference frequency generation scheme for carrier-envelope-offset phase stabilization applications. , 2005, Optics express.

[13]  Matthias Golling,et al.  Pulse repetition rate scaling from 5 to 100 GHz with a high-power semiconductor disk laser. , 2014, Optics express.

[14]  Jorg Hader,et al.  Modeling and experimental realization of modelocked VECSEL producing high power sub-100 fs pulses , 2018, Applied Physics Letters.

[15]  S. Diddams,et al.  High-power broadband laser source tunable from 3.0 μm to 4.4 μm based on a femtosecond Yb:fiber oscillator. , 2011, Optics letters.

[16]  Jun Ye,et al.  Mid-infrared virtually imaged phased array spectrometer for rapid and broadband trace gas detection. , 2012, Optics letters.

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

[18]  Tino Eidam,et al.  Pre-chirp managed nonlinear amplification in fibers delivering 100  W, 60  fs pulses. , 2015, Optics letters.

[19]  K. Gürel,et al.  Carrier-envelope offset frequency stabilization of a gigahertz semiconductor disk laser , 2017 .