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Timing jitter obtained from optical phase noise is investigated in InAs/InP quantum dot Fabry-Pérot coherent comb lasers with 11, 25, and 34.5 GHz pulse repetition rates. These lasers exhibit ultra-low timing jitter making them excellent sources for tens terabit optical networks., Optical Fiber Communication Conference, March 8-12, 2020, San Diego, California, US

A deadband-free method of microwave frequency measurement is proposed by cross-referencing the photonic harmonic down-converted tones based on cascaded four wave mixing in semiconductor optical amplifiers, enabling ultra-wide measurement with low-frequency analysis.

We generate correlated photons with 600 nm spectral distance via intermodal four wave mixing in silicon. We want to demonstrate on-silicon-chip heralded single photons, beyond 2 µm, without post spectral filtering.

Optical signal processing and sensing at a few photon level is now possible in parametric devices due to progress in longitudinal dispersion engineering. Amplifier design and performance is reviewed and results are summarized.

We proposed and demonstrated tunable Kerr frequency combs based on an ultrahigh-Q hybrid microsphere cavity. An ultralow parametric threshold of 0.42 mW and a tuning range of 0.8 nm are realized.

The history and physics of soliton microcombs are briefly overviewed. Several applications under active investigation are described including recent demonstrations of dual-comb spectroscopy and optical frequency synthesis to Hertz-level absolute accuracy over C-band.

We present photon pairs generated near the pump wavelength in the normal GVD regime by spontaneous four-wave mixing. The generated photons have temporal and spectral correlations and can be exploited as telecom-band quantum light sources.

We integrate a silicon waveguide spiral followed by on-chip cascaded Mach-Zehnder interferometers(MZIs) on a single chip. The silicon waveguide generates photon pairs by spontaneous four-wave mixing and the MZI filters separate the co-propagating pump (tel: +1 202.416.6191, e-mail: cstech@osa.org). © 2019 The Author(s)

We theoretically demonstrate a temperature sensor based on the method of degenerate FWM in As2S3 photonic crystal fiber. The sensitivity of the proposed sensor shows the Stokes shift of 5.91 nm/°C and anti-Stokes shift of -0.145 nm/◦C.

Evidence is presented for a 1.0-THz acoustic phonon parametric oscillator produced by acousto-optic phase-conjugate degenerate four-wave mixing in a THz-laser- pumped silicon doping superlattice. Coherent nanosecond-pulsed THz compressional and shear waves with different pumping thresholds were observed.

Clean 100-μJ-level laser pulses are generated by using single-stage cascaded four-wave-mixing process and then used as sampling pulses in single-shot cross-correlators. A dynamic-range of 1010 and temporal resolution of 160 fs are achieved simultaneously.

Automated, polarization-controlled 2D coherent spectroscopy is shown based on liquid-crystal variable retarders. Polarization-dependent rephasing spectra are recorded in a single scan, with absolute phase determined by a single auxiliary measurement.

We report quantum frequency translation with near unity efficiency and low noise via Bragg-scattering four-wave mixing. We demonstrate several applications including deterministic generation of single photons via frequency multiplexing and frequency-domain Hong-Ou-Mandel interference.

International audience; We investigate the saturable absorption of hybrid graphene/ silicon-nitride waveguides at telecom wavelengths. By measuring the power dependent transmission of picosecond and sub-picosecond pulses, we clarify the temporal dynamics of photo-excited carriers in graphene.

Hermite\penalty1000-\hskip0ptGaussian (HG), Laguerre\penalty1000-\hskip0ptGaussian (LG), and Ince-Gaussian (IG) modes have been of considerable importance for photonics. They have revealed a unique way to optical manipulation and are particularly promising for optical communications. This paper combines HG modes, as a basis, inside the nonlinear crystal and the generated second harmonic field turns to LG and IG modes. Here we present a way to use second order nonlinear media to convert optical beam modes as we wish.

We report experiments showing robustness of correlated and entangled biphoton states generated and guided in silicon quantum circuits with non-trivial topology. These results open new avenues to develop robust quantum qubits for quantum information systems.

Using a specially engineered topological bandgap and strong third-order nonlinearity of certain graphene metasurfaces, we demonstrate that it is possible to achieve net optical gain in four-wave-mixing of topologically-protected plasmon edge modes.

We present a dual-pump setup for generating tripartite entanglement using four-wave mixing in warm atomic vapor. We derive the output state for vacuum inputs and show that this state is genuine tripartite entangled.

Advanced heterodyne pump-probe techniques were developed and merged into broad-band 2D-coherent spectroscopy to study quantum state coupling within a wide energy range. We apply these NLO-techniques to NIR-materials like InAs QDs, PbS/CdS NCs and TMDs.

Efficient (-6 dB) parametric conversion is achieved in Photonic Crystal Cavities by compensating disorder-induced spectral misalignement. Spontaneous Four Wave Mixing up to 20 pW is detected with pump power about 0.1 mW.

Multi-photon interference is believed to have a fundamental role for obtaining a quantum advantage. In this work we discuss a reliable and efficient technique to find a signature of its presence in boson sampling experiments.

We study properties of Kagome fiber and calculate phase mismatching for several gases in this fiber. We find an appropriate pressure in which the phase mismatch is minimized in a Coherent anti-Stokes Raman Spectroscopy (CARS).

By introducing and modifying two-photon hyper-entangled states in the time-frequency domain using an on-chip micro-cavity, we succeed in generating high-dimensional cluster states, demonstrate d-level measurement-based quantum processing and show the state’s higher noise tolerance.

Temporal imaging is a technique that enables manipulation of temporal optical signals in a manner similar to manipulation of optical images in spatial domain. The main building block of temporal imaging, the time lens, is based on nonlinear optical processes such as the sum- frequency generation or the four-wave mixing. While classical temporal imaging is nowadays a well-established domain, its quantum counterpart is still in its nascent period. In this talk we shall give and overview of the quantum temporal imaging and its application for manipulation of non-classical states of the light.

Using spontaneous four-wave mixing in a 3-stage nonlinear interferometer for temporal mode shaping, we efficiently generate heralded single photons in telecom band with near ideal modal purity and heralding efficiency.

We develop a universal procedure for simulating sampling from arbitrary non-linear photonic Gaussian circuit with passive linear optics only, provided two-mode squeezed vacuum states are available as a prior resource.

1. Optical signal processing could add tunable and reconfigurable functions in physical layer that can enhance network flexibility 2. Flexible conversion between different levels of modulations formats without O/E/O conversions enable transparent gateways between optical networks and efficient use of fiber spectral resources 3. Reconfigurable bandwidth allocation in flex-grid optical network can improve spectral efficiency by fragmentation and overlapping optical channels. 4. Phase sensitive amplification could be beneficial for in-line optical signal regeneration. Raman assistant further enhances the parametric amplification in a phase-sensitive amplifier.

We demonstrate interval-free frequency comb spectroscopy using a tunable dissipative Kerr soliton microcomb, and 5 MHz spectral resolution is achieved-the highest ever reported for Kerr comb based spectroscopy measurements.

We report the experimental observation of biphoton entanglement between topologically and trivially localized modes in a nanophotonic lattice of coupled silicon waveguides.

We observe the two-beam coupling effect in dual-seeded four-wave mixing. The effect adds excess noise to the probe seeds at frequencies below 5 MHz when both probe seed powers are over 10 µW.

We experimentally demonstrate the generation of polarization insensitive phase conjugate of PM-QPSK signal in both input and output ports of SOA using partially degenerate four wave mixing with pump power of only 4 dBm.

In this work, we experimentally demonstrate simultaneous occurrence of second-, third-, fourth-harmonic generation, sum-frequency generation, four-wave mixing and six-wave mixing processes in III-V semiconductor metasurfaces with spectra spanning from the UV to the near-IR.

Raman emissions generated by four-wave mixing in hydrogen were coherently phased against the probe beam emitting at 267 nm by molecular phase modulation induced by a two-color pump beam emitting at 800/1200 nm.

We take one-dimensional data along arbitrary directions in the t-τ plane of a multidimensional coherent spectroscopy experiment to obtain projections in the ω Γ ω τ plane, allowing faster data collection and insight into the meaning of lineshapes.

We demonstrate Q factors of > 106 and parametric frequency conversion in Al 2 O 3 micro-trench resonators co-integrated with Si 3 N 4 waveguides on silicon. Under 1550-nm pumping we show oscillation at wavelengths ranging from 1135 to 2445 nm.

We designed and fabricated coupled-resonator optical waveguide filters on silicon platform with insertion loss ~1.5 dB, and obtained extinction ratio of > 70 dB for 7th filters by thermally tuning resonances of each ring.

Distributed mapping of four-wave mixing involving forward stimulated Brillouin scattering and Kerr nonlinearity is reported in simulation and experiment. The process strongly depends on frequency spacing between optical waves. Results are applicable to fiber sensing.

We propose the use of input-output cross correlations to quantify the performance of four-wave mixing time lenses with dispersion-induced degradation. The impact of disper­sion variations is investigated.

We identify the physical mechanism responsible for the generation of clustered frequency combs in optical microresonators. This theory is validated by experimentally measuring the coherence of such clustered combs in a MgF 2 monolithic microresonator.

We analyze the Brillouin Stokes in optical fibers, taking four-wave-mixing effects into account, and report that the phase-mismatch in the four-wave-mixing process may have a significant impact on the stimulation process in short optical fibers.

We demonstrate sub-millisecond response time dual-comb spectroscopy using quantum cascade lasers by measurements of Bromomethane and Freon 134a around 7.7 μm. The system achieves a noise-equivalent absorption of

Highly nonlinear waveguides are fabricated through deposition of chalcogenide glass into pre-patterned trenches in a silica cladding. No processing of the chalcogenide glass is required. Four-wave mixing is demonstrated with nonlinear coefficient of 6.5±1 [W×m]−1.

We demonstrate four-wave mixing (FWM) in a-Si:H waveguides in a multi-layer integrated photonic chip. The a-Si:H waveguides are accessed through interlayer couplers from waveguides composed of SiN x and exhibit 0.45±0.05 dB loss per transition.

We show theoretically and verify numerically that the initial stage of formation of a pulse from perturbed cw in passive mode locked lasers consists of a long and slow buildup where power is transferred in a cascade from lower to higher axial modes.

Towards delayed-choice generation of single photons in pure quantum states, we measure and model the purity of Stokes photons scattered from sapphire, measuring a maximum purity of 0.99±0.03 and high quantum correlation with anti-Stokes photons.

Continuous wave four-wave mixing (FWM) in ultra-silicon-rich nitride photonic crystal waveguides (PhCWs) is demonstrated using low coupled pump powers. A conversion efficiency of −37 dB was observed using a 776 um long PhCW.

Distributed monitoring of cascaded four-wave processes along an optical fiber is performed using a multi-tone optical time-domain reflectometry setup. The interplay between Kerr nonlinearity and guided acoustic waves Brillouin scattering is observed.