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Free-running dual-comb LiDAR at long distances with real-time processing at a 7.7-kHz update rate
(2023)Technical Digest Series ~ Optica Sensing Congress 2023 (AIS, FTS, HISE, Sensors, ES)We use a free-running single-cavity solid-state laser for dual-comb ranging of moving targets over long distances up to 50 meters with real-time tracking at an update rate of 7.7 kHz and micrometer-level precision.Other Conference Item -
Ultrafast dual-comb lasers
(2023)Dual-comb molecular and pump-probe spectroscopy with equivalent time sampling are currently limited by the cost, complexity, and size of conventional optical comb systems, based on two modelocked lasers and corresponding feedback loops. The single-cavity dual-comb diode-pumped solid-state and semiconductor lasers, however, substantially reduce the complexity of existing systems to a single compact free-running laser. In comparison to other ...Other Conference Item -
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Ultrafast thin-disk laser oscillator exceeding 400 W average output power using a replicating cavity scheme
(2023)Technical Digest Series ~ Ultrafast Optics 2023 - UFOXIIIWe demonstrate a modelocked thin-disk laser oscillator providing 410 W average power with a pulse duration of 751 fs at a repetition rate of 7.77 MHz. This is enabled by a replicating cavity scheme not demonstrated before in high-power or modelocked oscillator operation and the use of sapphire bonded SESAMs.Other Conference Item -
Dual-comb modelocked diode-pumped solid-state and semiconductor lasers
(2023)We have invented two new methods for multiplexing a single laser cavity to support a pair of noise-correlated, yet cavity length independent optical frequency combs. They are based on either polarization multiplexing with an intracavity birefringent crystal or spatial laser cavity multiplexing by inserting a monolithic device with two separate angles on the surface, such as a biprism. The two cavity modes share all intracavity components ...Other Conference Item -
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Ionization in intense laser fields beyond the electric dipole approximation
(2023)Other Conference Item -
3-W output power at 2 µm from a flip-chip processed InGaSb VECSEL based on a hybrid metal-semiconductor Bragg reflector
(2023)Proceedings of SPIE ~ Vertical External Cavity Surface Emitting Lasers (VECSELs) XIIThe key limiting factor for output power scaling of VECSELs is the thermal resistance of the structure owing to the reflector thickness and the heat conductivity of the semiconductor materials. We have successfully fabricated a flip-chip processed VECSEL emitting at 2 µm using a GaSb/AlAs0.08Sb0.92 hybrid Bragg reflector with 10.5 mirror pairs and a 100–nm copper layer. The flip-chip processed VECSEL reaches a record high continuous wave ...Other Conference Item -
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Rapid THz-TDS enabled by single-cavity solid-state GHz dual-comb oscillator
(2023)Proceedings of SPIE ~ Terahertz, RF, Millimeter, and Submillimeter-Wave Technology and Applications XVIWe present THz-TDS with a low-noise single-cavity dual-comb GHz oscillator. This solid-state laser delivers two mutually coherent combs with 70-fs pulses, 1055-nm center wavelength, 110 mW per comb, and a repetition rate difference up to 100 kHz. In a proof of principle THz experiment, we direct the two combs onto two photoconductive antennae to efficiently generate and electrooptically sample the THz waveform. At a repetition rate ...Other Conference Item