We demonstrate an approach for automated Kerr comb generation in the normal group-velocity dispersion (GVD) regime. Using a coupled-ring geometry silicon nitride, we precisely control wavelength location and splitting strength of avoided mode crossings to generate low-noise frequency combs with pump-to-comb conversion efficiencies up 41%, which is highest reported date normal-GVD combs. Our technique enables on-demand high-power source applications such as wavelength-division multiplexing...

Squeezed states are a primary resource for continuous-variable (CV) quantum information processing. To implement CV protocols in scalable and robust way, it is desirable to generate manipulate squeezed using an integrated photonics platform. In this Letter, we demonstrate the generation of quadrature-phase radio-frequency carrier sideband small-footprint silicon-nitride microresonator with dual-pumped four-wave-mixing process. We record noise level 1.34 dB...

The need for solving optimization problems is prevalent in various physical applications, including neuroscience, network design, biological systems, socio-economics, and chemical reactions. Many of these are classified as non-deterministic polynomial-time hard thus become intractable to solve the system scales a large number elements. Recent research advances photonics have sparked interest using coupled degenerate optical parametric oscillators (DOPOs) effectively find ground state Ising...

Frequency encoding of quantum information together with fiber and integrated photonic technologies can significantly reduce the complexity resource requirements for realizing all-photonic networks. The key challenge such frequency domain processing single photons is to realize coherent selective interactions between optical fields different frequencies over a range bandwidths. Here, we report frequency-domain Hong-Ou-Mandel interference spectrally distinct generated from chip-based...

We investigate the conversion efficiency (CE) of soliton modelocked Kerr frequency combs. Our analysis reveals three distinct scaling regimes CE with cavity free spectral range (FSR), which depends on relative contributions coupling and propagation loss to total loss. measurements, for case critical coupling, verify our theoretical prediction over a FSRs pump powers. numerical simulations also indicate that mode crossings have an adverse effect achievable CE. results microresonator combs...

Abstract In this work, two WR-3 band waveguide diplexers based on symmetrical H-plane and E-plane Y-junctions are developed, fabricated, compared to highlight bandwidth performance. Both first analyzed determine the conditions for implementing wideband diplexers. Then a mid-band diplexer-I diplexer-II designed demonstrated through CNC-milling technology. The measured results of show central frequencies 251.5 GHz 294 GHz, 3 dB fractional bandwidths (FBWs) 5.6% 3.3%, as well insertion losses...

Over the past decade, remarkable advances have been realized in chip-based nonlinear photonic devices for classical and quantum applications near- mid-infrared regimes. However, few demonstrations visible near-visible regimes, primarily due to large normal material group-velocity dispersion (GVD) that makes it challenging phase match third-order parametric processes. In this paper, we show exploiting engineering of higher-order waveguide modes provides allows small or anomalous GVD regimes...

We present an approach for generating widely separated first sidebands based solely on the four-wave-mixing process in optical parametric oscillators built complementary metal–oxide–semiconductor-compatible photonic chips. Using higher-order transverse modes to perform dispersion engineering, we obtain zero-group-velocity near 796 nm. By pumping chip normal region, at 795.6 nm, generate a signal field visible band (at 546.2 nm) and corresponding idler telecom 1465.3 nm), frequency span of...

Terephthalate (TA) intercalated layered double hydroxides (LDHs) were synthesized using as raw materials, and poly(ethylene terephthalate) (PET)/LDH nanocomposites with different contents of TA LDHs prepared by in-situ polymerization.The structure, morphology thermal property PET/LDH investigated.The partially exfoliated well dispersed in PET matrix.The exhibit enhanced stability relative to pure PET, confirmed the thermogravimetric analysis results.The results differential scanning...

Kerr soliton combs operate in the anomalous group-velocity dispersion regime through excitation of dissipative solitons. The generated bandwidth is largely dependent on cavity dispersion, with higher-order contributing to dispersive-wave (DW) generation that allows for power enhancement comb lines at wings spectrum. However, spectral position DW highly sensitive overall and inevitable dimension variations occur during fabrication process result deviations emission wavelength. Here, we...

We employ the process of non-degenerate four-wave mixing Bragg scattering (FWM-BS) to demonstrate all-optical control in a silicon platform. In our configuration, strong, non-information-carrying pump is mixed with weak and an input signal silicon-on-insulator waveguide. Through optical nonlinearity this highly-confining waveguide, controls wavelength conversion from idler, leading controlled depletion signal. The strong pump, on other hand, plays role constant bias. work, we show...

We describe a new fabrication method for making wire-grid polarizers the visible and near-IR based on deep-UV interference lithography, nanoimprint, glancing angle deposition. fabricated aluminum wire grids with periods ranging from 375 to 230 nm heights 145 110 nm, respectively. The measured extinction ratio was as high 220:1 at 1064 nm. performance of polarizer is limited by roughness porosity Al film underlying SU-8 structure. This allows patterning any substrate material, which makes...

We demonstrate controlled wavelength conversion on a silicon chip based four-wave mixing Bragg scattering (FWM-BS). A total efficiency of 5% is achieved with strongly unbalanced pumps and controlling peak power 55 mW, while the over 15% when using less asymmetric pumps. The numerical simulation agrees experimental results. Both time domain spectral noise measurements show as low 2 dB signal-to-noise ratio (SNR) penalty because strong pump noise, two-photon absorption, free-carrier absorption...

Waveguides were fabricated from n -type doped GeSn layers with Sn content in the range 4.4-7.0 % grown on Ge-buffered Si substrates. The waveguides optically pumped a 976nm continuous wave laser, and their power output was measured as function of pump power. dependence indicates light amplification through stimulated emission, that acts gain medium. Under experimental conditions, cavity did not exceed lasing threshold, but amplified spontaneous emission still observed. This demonstration...

In a passive cavity geometry, there exists trade-off between resonant enhancement and response time, which is inherently limited by the photon lifetime. We demonstrate frequency-selective, dynamic control of lifetime using silicon-nitride coupled-ring resonator. The tuned controlling an avoided mode crossing thermo-optic tuning resonance with integrated heaters. Using this effect, we achieve fast turn-on/off <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow...

Chip-based optical amplifiers can significantly expand the functionalities of photonic devices. In particular, optical-parametric (OPAs), with engineerable gain spectra, are well suited for nonlinear-photonic applications. OPAs typically require long waveguides that occupy a large footprint, and high pump powers cannot be easily produced chip-scale lasers. We theoretically experimentally demonstrate microresonator-assisted regenerative OPA benefits from nonlinearity enhancement...

Microresonator-based platforms with ${\chi ^{(2)}}$ nonlinearities have the potential to perform frequency conversion at high efficiencies and ultralow powers small footprints. The standard doctrine for achieving efficiency in cavity-based devices requires "perfect matching," that is, zero phase mismatch while all relevant frequencies are precisely a cavity resonance, which is difficult achieve integrated due fabrication errors limited tunabilities. In this Letter, we show violation of...

This paper reports on the beneficial effects of adding silicon nitride (SiN) thin layers to protect polyimide (PI) insulation used in new, high voltage digital isolator devices. The larger bandgap SiN enables an increased barrier height at interfaces between metal and PI thus limiting charge injection mitigating space formation bulk. Wafer-level electrical tests PI, PI-SiN, SiN-PI SiN-PI-SiN multilayer capacitor structures are presented show reduced leakage currents, lower HV dielectric...

We generate and measure the versatile vortex linear light bullet, which combines a high-order Bessel beam an Airy pulse.This three-dimensional optical wave packet propagates without distortion in any medium, while carrying orbital angular momentum.Its non-varying feature propagation is verified by threedimensional measurement.Such novel bullet can be useful various applications such as micromachining.

The generation of spectrally pure high-frequency microwave signals is a critical functionality in fundamental and applied sciences, including metrology communications. development optical frequency combs has enabled the powerful technique division (OFD) to produce oscillations highest quality. approaches for OFD demonstrated date demand multiple lasers with space- energy-consuming stabilization electronic feedback components, resulting device footprints incompatible integration into compact...