Publications (9)
Tunable mid-infrared generation via wide-band four wave mixing in silicon nitride waveguides
Abijith Kowligy, Daniel Hickstein, Alex Lind +8
We experimentally demonstrate wide-band (>100 THz) frequency down-conversion of near-infrared (NIR) femtosecond-scale pulses from an Er:fiber laser to the mid-infrared (MIR) using…
Mid-infrared frequency comb generation via cascaded quadratic nonlinearities in quasi-phase-matched waveguides
Abijith S. Kowligy, Alex Lind, Daniel D. Hickstein +7
We experimentally demonstrate a simple configuration for mid-infrared (MIR) frequency comb generation in quasi-phase-matched lithium niobate waveguides using the cascaded-$Ï^{(2)}…
Mid-infrared frequency combs at 10 GHz
Abijith Kowligy, David Carlson, Daniel Hickstein +5
We demonstrate mid-infrared (MIR) frequency combs at 10 GHz repetition rate via intra-pulse difference-frequency generation (DFG) in quasi-phase-matched nonlinear media. Few-cycle…
Infrared electric-field sampled frequency comb spectroscopy
Abijith S. Kowligy, Henry Timmers, Alex Lind +5
Molecular spectroscopy in the mid-infrared portion of the electromagnetic spectrum (3--25 um) has been a cornerstone interdisciplinary analytical technique widely adapted across th…
Dual frequency comb spectroscopy in the molecular fingerprint region
Henry Timmers, Abijith Kowligy, Alex Lind +8
Spectroscopy in the molecular fingerprint spectral region (6.5-20 m) yields critical information on material structure for physical, chemical and biological sciences. Despite d…
Self-referenced frequency combs using high-efficiency silicon-nitride waveguides
David R. Carlson, Daniel D. Hickstein, Alex Lind +8
We utilize silicon-nitride waveguides to self-reference a telecom-wavelength fiber frequency comb through supercontinuum generation, using 11.3 mW of optical power incident on the…
High-harmonic generation in periodically poled waveguides
Daniel D. Hickstein, David R. Carlson, Abijith Kowligy +10
Optical waveguides made from periodically poled materials provide high confinement of light and enable the generation of new wavelengths via quasi-phase-matching, making them a key…
Mid-infrared frequency comb with 6.7 W average power based on difference frequency generation
Anthony Catanese, Jay Rutledge, Myles Silfies +6
We report on the development of a high-power mid-infrared frequency comb with 100 MHz repetition rate and 100 fs pulse duration. Difference frequency generation is realized between…
Ultrabroadband supercontinuum generation and frequency-comb stabilization using on-chip waveguides with both cubic and quadratic nonlinearities
Daniel D. Hickstein, Hojoong Jung, David R. Carlson +13
Using aluminum-nitride photonic-chip waveguides, we generate optical-frequency-comb supercontinuum spanning from 500 nm to 4000 nm with a 0.8 nJ seed pulse, and show that the spect…