Mid-infrared frequency combs at 10 GHz

Abstract

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 pump pulses ($\lesssim$15 fs, 100 pJ) from a near-infrared (NIR) electro-optic frequency comb are provided via nonlinear soliton-like compression in photonic-chip silicon-nitride waveguides. Subsequent intra-pulse DFG in periodically-poled lithium niobate waveguides yields MIR frequency combs in the 3.1--4.1 $\mu$m region, while orientation-patterned gallium phosphide provides coverage across 7--11 $\mu$m. Cascaded second-order nonlinearities simultaneously provide access to the carrier-envelope-offset frequency of the pump source via in-line f-2f nonlinear interferometry. The high-repetition rate MIR frequency combs introduced here can be used for condensed phase spectroscopy and applications such as laser heterodyne radiometry.

References in corpus (14)

• Mid-infrared frequency combs
• Integrated gallium phosphide nonlinear photonics
• High Coherence Mid-Infrared Dual Comb Spectroscopy Spanning 2.6 to 5.2 microns
• Phase-stabilized, 1.5-W frequency comb at 2.8 to 4.8 micron
• Mid-infrared dual-comb spectroscopy with electro-optic modulators
• An ultrafast electro-optic light source with sub-cycle precision
• Mid-Infrared Optical Frequency Combs based on Difference Frequency Generation for Molecular Spectroscopy
• Quantum state resolution of the C${}_{60}$ fullerene
• On-chip parametric amplification with 26.5~dB gain at telecommunication wavelengths using CMOS-compatible hydrogenated amorphous silicon waveguides
• Particle correlations and evidence for dark state condensation in a cold dipolar exciton fluid
• ${\chi }^{(2)}$ mid-infrared frequency comb generation and stabilization with few-cycle pulses
• On-chip mid-infrared and THz frequency combs for spectroscopy
• Nonlinear silicon waveguides generating broadband, spectrally engineered frequency combs spanning 2.0-8.5 um
• Generating few-cycle pulses with integrated nonlinear photonics

Cited by in corpus (4)

• 2023 Astrophotonics Roadmap: pathways to realizing multi-functional integrated astrophotonic instruments
• Tunable dual-comb spectrometer for mid-infrared trace gas analysis from 3 to 4.7 μm
• Isotope Ratio Dual-Comb Spectrometer
• Mid-infrared frequency comb with 25 pJ threshold via CW-seeded optical parametric generation in nonlinear waveguide