134 citations · 937 across the 23 of their papers we have counts for
24 papers
Dynamic spectral tailoring of a 10 GHz laser frequency comb for enhanced calibration of astronomical spectrographs
Pooja Sekhar, Connor Fredrick, Peter Zhong +3
Laser frequency combs (LFCs) are an important component of Doppler radial velocity (RV) spectroscopy that pushes fractional precision to the level, as required to identi…
Optical Two-Tone Time Transfer
Jonathan D. Roslund, Abijith S. Kowligy, Junichiro Fujita +5
Sub-picosecond timing synchronization can enable future optical timekeeping networks, including coherent phased array radar imaging at GHz levels, intercontinental clock comparison…
Optical Clocks at Sea
Jonathan D. Roslund, Arman Cingöz, William D. Lunden +8
Deployed optical clocks will improve positioning for navigational autonomy, provide remote time standards for geophysical monitoring and distributed coherent sensing, allow time sy…
Broadband ultraviolet-visible frequency combs from cascaded high-harmonic generation in quasi-phase-matched waveguides
Jay Rutledge, Anthony Catanese, Daniel D. Hickstein +3
High-harmonic generation (HHG) provides short-wavelength light that is useful for precision spectroscopy and probing ultrafast dynamics. We report efficient, phase-coherent harmoni…
Fully phase-stabilized 1 GHz turnkey frequency comb at 1.56 m
Daniel M. B. Lesko, Alexander J. Lind, Nazanin Hoghooghi +7
Low noise and high repetition rate optical frequency combs are desirable for many applications from timekeeping to precision spectroscopy. For example, gigahertz repetition rate so…
A six-octave optical frequency comb from a scalable few-cycle erbium fiber laser
Daniel M. B. Lesko, Henry Timmers, Sida Xing +3
A compact and robust coherent laser light source that provides spectral coverage from the ultraviolet to infrared is desirable for numerous applications, including heterodyne super…
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…
All-fiber frequency comb at 2 μm providing 1.4-cycle pulses
Sida Xing, Abijith S. Kowligy, Daniel M. B. Lesko +2
We report an all-polarization-maintaining fiber optic approach to generating sub-2 cycle pulses at 2 μm and a corresponding octave-spanning optical frequency comb. Our configuratio…
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…
Nonlinear silicon waveguides generating broadband, spectrally engineered frequency combs spanning 2.0-8.5 um
Nima Nader, Abijith Kowligy, Jeff Chiles +9
Nanophotonic waveguides with sub-wavelength mode confinement and engineered dispersion profiles are an excellent platform for application-tailored nonlinear optical interactions at…
Multi-functional integrated photonics in the mid-infrared with suspended AlGaAs on silicon
Jeff Chiles, Nima Nader, Eric J. Stanton +14
The microscale integration of mid- and longwave-infrared photonics could enable the development of fieldable, robust chemical sensors, as well as highly efficient infrared frequenc…
mid-infrared frequency comb generation and stabilization with few-cycle pulses
Alexander J. Lind, Abijith Kowligy, Henry Timmers +5
Mid-infrared laser frequency combs are compelling sources for precise and sensitive metrology with applications in molecular spectroscopy and spectro-imaging. The infrared atmosphe…
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…
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…
Self-organized nonlinear gratings for ultrafast nanophotonics
Daniel D. Hickstein, David R. Carlson, Haridas Mundoor +7
Modern nonlinear optical materials allow light of one wavelength be efficiently converted into light at another wavelength. However, designing nonlinear optical materials to operat…
Heterogeneously integrated GaAs waveguides on insulator for efficient frequency conversion
Lin Chang, Andreas Boes, Xiaowen Guo +12
Tremendous scientific progress has been achieved through the development of nonlinear integrated photonics. Prominent examples are Kerr-frequency-comb generation in micro-resonator…
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-…
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 de…
Quasi-phase-matched supercontinuum-generation in photonic waveguides
Daniel D. Hickstein, Grace C. Kerber, David R. Carlson +7
Supercontinuum generation in integrated photonic waveguides is a versatile source of broadband light, and the generated spectrum is largely determined by the phase-matching conditi…
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…
Versatile silicon-waveguide supercontinuum for coherent mid-infrared spectroscopy
Nima Nader, Daniel L. Maser, Flavio C. Cruz +9
Infrared spectroscopy is a powerful tool for basic and applied science. The molecular spectral fingerprints in the 3 um to 20 um region provide a means to uniquely identify molecul…
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…
Optical sum-frequency generation in whispering gallery mode resonators
Dmitry V. Strekalov, Abijith S. Kowligy, Yu-Ping Huang +1
We demonstrate sum-frequency generation in a nonlinear whispering gallery mode resonator between a telecom wavelength and the Rb D2 line, achieved through natural phase matching. D…
Experimental demonstration of interaction-free all-optical switching via the quantum Zeno effect
Kevin T. McCusker, Yu-Ping Huang, Abijith Kowligy +1
We experimentally demonstrate all-optical interaction-free switching using the quantum Zeno effect, achieving a high contrast of 35:1. The experimental data matches a zero-paramete…