Optical parametric oscillator
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100,000-spin coherent Ising machine Open
We constructed a large optical computer based on optical parametric oscillators coupled via measurement and feedback.
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Mid-infrared optical frequency combs based on difference frequency generation for molecular spectroscopy Open
Mid-infrared femtosecond optical frequency combs were produced by difference frequency generation of the spectral components of a near-infrared comb in a 3-mm-long MgO:PPLN crystal. We observe strong pump depletion and 9.3 dB parametric ga…
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On-chip χ<sup>(2)</sup> microring optical parametric oscillator Open
Optical parametric oscillators (OPOs) have been widely used for decades as tunable, narrow-linewidth, and coherent light sources for reaching long wavelengths and are attractive for applications such as quantum random number generation and…
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Modulation Instability Induced Frequency Comb Generation in a Continuously Pumped Optical Parametric Oscillator Open
Continuously pumped passive nonlinear cavities can be harnessed for the creation of novel optical frequency combs. While most research has focused on third-order "Kerr" nonlinear interactions, recent studies have shown that frequency comb …
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Photon counting LIDAR at 23µm wavelength with superconducting nanowires Open
In this work, we show a proof-of-principle benchtop single-photon light detection and ranging (LIDAR) depth imager at 2.3µm, utilizing superconducting nanowire single-photon detectors (SNSPDs). We fabricate and fiber-couple SNSPDs to exhib…
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Four-wave-mixing-based optical parametric oscillator delivering energetic, tunable, chirped femtosecond pulses for non-linear biomedical applications Open
A novel concept for an optical parametric oscillator based on four-wave mixing (FOPO) in an optical fiber is presented. This setup has the ability of generating highly chirped signal and idler pulses with compressed pulse durations below 6…
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Dual-pumped degenerate Kerr oscillator in a silicon nitride microresonator Open
We demonstrate a degenerate parametric oscillator in a silicon nitride microresonator. We use two frequency-detuned pump waves to perform parametric four-wave mixing and operate in the normal group-velocity dispersion regime to produce sig…
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kHz-rate four-dimensional fluorescence tomography using an ultraviolet-tunable narrowband burst-mode optical parametric oscillator Open
Recent work on four-dimensional (4D) tomographic imaging of reacting and non-reacting flows has utilized fluorescence, incandescence, or scattering from flow tracers, particulates, or aerosols, typically at the harmonics of an Nd:YAG laser…
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Analysis of Fixed and Live Single Cells Using Optical Photothermal Infrared with Concomitant Raman Spectroscopy Open
This paper reports the first use of a novel completely optically based photothermal method (O-PTIR) for obtaining infrared spectra of both fixed and living cells using a quantum cascade laser (QCL) and optical parametric oscillator (OPO) l…
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Mid-infrared ZGP-OPO with a high optical-to-optical conversion efficiency of 757% Open
We experimentally demonstrate a ZnGeP2 based optical parametric oscillator (ZGP-OPO) with a record of the optical-to-optical conversion efficiency. To improve the conversion efficiency, we design and construct a double-pass pumped high-gai…
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Dual-comb spectroscopy in the spectral fingerprint region using OPGaP optical parametric oscillators Open
Infrared spectroscopy in the spectral fingerprint region from 6-12 µm accesses the largest molecular absorption cross-sections, permitting sensitive, quantitative and species-specific measurements.Here, we show how dual-comb spectroscopy-a…
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A High-Power Continuous-Wave Mid-Infrared Optical Parametric Oscillator Module Open
We demonstrate here a compact optical parametric oscillator module for mid-infrared generation via nonlinear frequency conversion. This module weighs only 2.5 kg and fits within a small volume of 220 × 60 × 55 mm3. The module can be easily…
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High speed intravascular photoacoustic imaging with fast optical parametric oscillator laser at 1.7 <i>μ</i>m Open
Intravascular photoacoustic imaging at 1.7 μm spectral band has shown promising capabilities for lipid-rich vulnerable atherosclerotic plaque detection. In this work, we report a high speed catheter-based integrated intravascular photoacou…
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Dynamical Two-Mode Squeezing of Thermal Fluctuations in a Cavity Optomechanical System Open
We report the experimental observation of two-mode squeezing in the oscillation quadratures of a thermal micro-oscillator. This effect is obtained by parametric modulation of the optical spring in a cavity optomechanical system. In additio…
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Controlled switching of orbital angular momentum in an optical parametric oscillator Open
Controlled switching of orbital angular momentum (OAM) of light at practical powers over arbitrary wavelength regions can have important implications for future quantum and classical systems. Here we report on a single source of OAM beams …
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High power, tunable mid-infrared BaGa_4Se_7 optical parametric oscillator pumped by a 21 μm Ho:YAG laser Open
We, for the first time, demonstrate a tunable mid-infrared BaGa4Se7-based optical parametric oscillator pumped by a acousto-optical Q-switched Ho:YAG laser at 2090.6 nm. Up to 1.55 W of average power was generated in the 3-5 μm range, corr…
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Broadband cascaded four-wave mixing and supercontinuum generation in a tellurite microstructured optical fiber pumped at 2 μm Open
We demonstrate the broadband cascaded four-wave mixing (FWM) and supercontinuum (SC) generation in a tellurite MOF which is made from 76.5TeO(2)-6ZnO-11.5Li(2)O-6Bi(2)O(3) (TZLB, mol%) glass. By using a 2-μm picosecond laser with the cente…
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One-way quantum computing with arbitrarily large time-frequency continuous-variable cluster states from a single optical parametric oscillator Open
One-way quantum computing is experimentally appealing because it requires only local measurements on an entangled resource called a cluster state. Record-size, but nonuniversal, continuous-variable cluster states were recently demonstrated…
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Computational Principle and Performance Evaluation of Coherent Ising Machine Based on Degenerate Optical Parametric Oscillator Network Open
We present the operational principle of a coherent Ising machine (CIM) based on a degenerate optical parametric oscillator (DOPO) network. A quantum theory of CIM is formulated, and the computational ability of CIM is evaluated by numerica…
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High Repetition Rate Mid-Infrared Differential Absorption Lidar for Atmospheric Pollution Detection Open
Developments in mid-infrared Differential Absorption Lidar (DIAL), for gas remote sensing, have received a significant amount of research in recent years. In this paper, a high repetition rate tunable mid-infrared DIAL, mounted on a mobile…
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Mid-infrared ZGP OPO with divergence compensation and high beam quality Open
Divergence compensation, optimization of the optical-to-optical efficiency, and high beam quality of signal and idler beams of a high-energy mid-infrared ZnGeP2 (ZGP) optical parametric oscillator (OPO) have been demonstrated by use of a G…
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High-power femtosecond mid-infrared optical parametric oscillator at 7 μm based on CdSiP_2 Open
We report a femtosecond optical parametric oscillator (OPO) for the mid-infrared (mid-IR), generating a record average power of 110 mW at 7 μm. The OPO, based on CdSiP(2) (CSP) as the nonlinear crystal, provides idler wavelength tuning acr…
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Femtosecond optical parametric oscillators toward real-time dual-comb spectroscopy Open
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Directly diode-pumped, Kerr-lens mode-locked, few-cycle Cr:ZnSe\n oscillator Open
Lasers based on Cr$^{2+}$-doped II-VI material, often known as the\nTi:Sapphire of the mid-infrared, can directly provide few-cycle pulses with\nsuper-octave-spanning spectra, and serve as efficient drivers for generating\nbroadband mid-in…
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Hexapartite Entanglement in an above-Threshold Optical Parametric Oscillator Open
We demonstrate, theoretically and experimentally, the generation of hexapartite modal entanglement by the optical parametric oscillator (OPO) operating above the oscillation threshold. We show that the OPO generates a rich structure of ent…
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Multi-frequency differential absorption LIDAR system for remote sensing of CO<sub>2</sub> and H<sub>2</sub>O near 16 µm Open
The specifications and performance of a ground-based differential absorption LIDAR (light detection and ranging) system (DIAL) using an optical parametric oscillator (OPO) are presented. The OPO is injection-seeded with the output of a con…
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Mid-infrared supercontinuum generation in suspended core tellurite microstructured optical fibers Open
We report the fabrication of a tellurite optical fiber with a suspended core design, formed on a 220-nm-wide filament of glass. The fiber was pumped at two different wavelengths (1500 and 2400 nm) using femtosecond pulses generated from an…
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Boltzmann sampling for an XY model using a non-degenerate optical parametric oscillator network Open
We present an experimental scheme of implementing multiple spins in a classical XY model using a non-degenerate optical parametric oscillator (NOPO) network. We built an NOPO network to simulate a one-dimensional XY Hamiltonian with 5000 s…
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High-speed quantum cascade detector characterized with a mid-infrared femtosecond oscillator Open
Quantum cascade detectors (QCD) are photovoltaic mid-infrared detectors based on intersubband transitions. Owing to the sub-picosecond carrier transport between subbands and the absence of a bias voltage, QCDs are ideally suited for high-s…
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Preparing quasienergy states on demand: A parametric oscillator Open
We study a nonlinear oscillator, which is parametrically driven at a\nfrequency close to twice its eigenfrequency. By judiciously choosing the\nfrequency detuning and linearly increasing the driving amplitude, one can\nprepare any even qua…