Auxiliary laser heating has become a widely adopted method for Kerr soliton frequency comb generation in optical microcavities, thanks to its reliable and easy-to-achieve merits solving the thermal instability during formation of dissipative solitons. Here, we conduct optimization auxiliary by leveraging distinct loss absorption characteristics different longitudinal polarization cavity modes. We show that even if pump lasers enter orthogonal modes, their mutual photothermal balance can be...

We introduce a method that synergistically combines the distinct phase noise profiles of dielectric resonator oscillator (DRO) and bichromatic Brillouin laser (BBLO), for high spectral purity microwave generation. Typically, free-running DROs exhibit high-phase at low-frequency offsets but ultra-low-phase offsets. In contrast, BBLOs based on photonic devices demonstrate very low-phase low offsets, yet they experience increased higher due to photodetector shot noise. By locking DRO...

Optical format conversion technologies have attracted a lot of attention to bridge the different optical networks employing formats. In this paper, advances are introduced and reviewed. Through analyzing network architecture modulation technology development, we focus on conversions between signals with one dimensional two constellations. The important enabling for flexible constellation manipulation in detail, including linear nonlinear effects-based functions. Then key researches reviewed...

An all-optical format conversion (AOFC) scheme for star-octal quadrature amplitude modulation (star-8QAM) signals is proposed and numerically simulated based on nonlinear effects in the high fiber (HNLF). In first stage AOFC processing, input 30 Gbit/s star-8QAM signal firstly de-aggregated into one 20 phase shift keying (QPSK) 10 typical on-off (OOK) by deploying self-phase (SPM), cross-phase (XPM) parametric amplification (PA) effects. second QPSK OOK are aggregated again utilizing XPM PA...

An optical format interconversion scheme between on-off keying (OOK) and quadrature phase shift (QPSK) is proposed verified in this paper. The conversion system mainly consists of a coherent vector combiner reconfigurable two-dimensional (2D) mover. As key element the system, 2D mover implemented by non-degenerate phase-sensitive amplifier (PSA). operating principle theoretical derivations PSA-based are fully introduced. transfer characteristics analyzed under different parameter settings to...

A flexible all-optical format interconversion scheme based on a pump assisted nonlinear optical loop mirror (NOLM) is proposed and numerically simulated for the first time to our knowledge. In this scheme, input multi-Gbps 8QAM signals are divided into clockwise (CW) counter-clockwise (CCW) components by 3-dB coupler (OC), which also couples light from NOLM CCW direction. The numerical model of with CW paths simplified using Mach-Zehnder interferometer (MZI). Optical in upper MZI arm will be...

All-optical phase regeneration aims at restoring the information of coherently encoded data signals directly in optical domain so as to compensate for distortions caused by transceiver imperfections and nonlinear impairments along transmission link. Although it was proposed two decades ago, all-optical has not been seen realistic networks date, mainly because this technique entails complex bulk modules relies on high-precision sensitive dynamics, both which are adverse field deployment....

An all-optical format conversion (AOFC) scheme for the input 30 Gbit/s rectangular 8-ary quadrature amplitude modulation (8QAM) signal is proposed and numerically investigated based on phase-sensitive amplification (PSA) nonlinear Mach-Zehnder interferometer (MZI). Firstly, 8QAM orthogonal decomposed into inphase components PSA, respectively. The in-phase component 4-ary phase shift keying (4APSK) binary (BPSK) signal. Secondly, converted 4APSK transmitted one piece of highly fiber (HNLF) to...

An all-optical format conversion (AOFC) scheme of star-m-ary quadrature amplitude modulation (star-mQAM) based on a nonlinear Mach-Zehnder interferometer (MZI) with nested-pump assisted optical loop mirror (nested-PA-NOLM) is proposed and numerically simulated. In this scheme, input multi-Gbps star-8QAM signals can be converted into three phase shift keying (QPSK) (namely QPSK-A, -B -C) through the PA-NOLM under different power signal pump. The MZI formed by two PA-NOLMs upper lower arms,...

We propose and demonstrate a Frequency Modulated Continuous Wave (FMCW) laser source realized through sideband modulation four-wave mixing (FWM). A silicon waveguide, featuring reverse-biased P-i-N junction, is designed to excite FWM process. With the increase of applied bias voltage, efficiency effect in waveguide improved due more effective removal free-carriers. The integrated enables high conversion −12 dB. In experiment, radio frequency (RF) signal swept over range 9 GHz 11 GHz. was...

Cavity ringdown spectroscopy is an essential test to measure ultrahigh quality factor (UHQ) optical cavities, which is, however, frequently misinterpreted due lack of a specified analysis guideline. Here we clarify the basic property cavity and present step-by-step method that enables extraction overall factor, as well intrinsic loss coupling state UHQ cavities with better fidelity simplicity than prior schemes. Our work can facilitate accurate design characterization for ultra-low noise...

Abstract Van der Waals (vdWs) heterostructures enable the fabrication of various optoelectronic devices with unprecedented functionalities, particularly antiambipolar transistors. Different methods have been employed to construct such devices; however, their integration and versatility remain significantly constrained. Here, large‐scale vdWs heterostructure arrays capable implementing self‐adaptive artificial perception systems reconfigurable logic gates are verified adopting 2D Te/WS 2...

Separation by IMplantation of OXygen (SIMOX) 3-D sculpting is considered as a new method for strain engineering in buried silicon waveguides. A model capable analyzing the stress distribution and gradient waveguides developed. The modeled shows agreement with experimental measurements obtained using Raman spectroscopy. Our not only provides way to engineer but allows integration strained-silicon-based devices other optical and/or electronic on same substrate well, improving device density...

In this paper, we report a novel optical data fragmentation multipath (ODFM) scheme for coherent communication based on electrical signal processing in simulation. Under the control of pseudo-random sequence (PRBS), randomly disperse user and assign them to paths corresponding different wavelengths transmission. To reduce hardware complexity system requirements receiver sensitivity, adopt binary phase shift keying (BPSK) modulation homodyne detection scheme. verify feasibility proposed ODFM...

An all-optical format conversion and regeneration scheme about 4-ary amplitude phase shift keying (4APSK) signals is proposed numerically simulated based on nonlinear effects in the high fiber (HNLF). The input 4APSK signal firstly converted into a regular quadrature (QPSK) by Mach-Zehnder interferometer (MZI) self-phase modulation (SPM). Secondly, degenerate phase-sensitive amplification (PSA) four-wave mixing (FWM) utilized to convert regular-QPSK two binary (BPSK) signals. MZI...

We propose and demonstrate a highly efficient photonic-assisted microwave signal harmonic frequency down- conversion using four-wave mixing (FWM) in silicon waveguide with reverse-biased P-i-N junction. The FWM phenomenon occurred the integrated due to doped regions of junction can increase efficiency free carrier removal from region. Correspondingly, is up 12.8 dB bias voltage 30 V. fully packaged grating coupling fiber array wire-bonded printed circuit board (PCB). By simply adjusting...

We propose and demonstrate an optical pulse generator using optoelectronic oscillator (OEO) Fabry-Perot phase modulator (FP-PM). A complete theoretical analysis is developed, the advantages of proposed system are also discussed. The frequency comb (OFC) generated with OEO loop to create broadband mode low noise. It theoretically proved that OFC pulses a spectrum 33 flat lines can be FP-PM. 25 GHz full-width-at-half-maximum (FWHM) less than 4 ps, signal-to-noise ratio (SNR) better 40 dB. By...

Whispering-gallery-mode (WGM) resonator with high-quality factor ( <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Q</i> ) is a key platform for wide range of fields including nonlinear optics, biosensing and quantum photonics. In this work, packaged silica microrod (PSMR) ultrahigh- <inline-formula xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\bf 9.0\times 10^{8}$</tex-math></inline-formula> experimentally...

Strain in silicon plays a significant role exploring electro-optical material, boosting transistor performance, tuning birefringence of optical waveguides, and so on. In this paper, we measured, for the first time, nanoscale strain SIMOX 3-D sculpted waveguides using tip-enhanced Raman spectroscopy (TERS). A model, which relates observed peak shifts to localized stresses our TERS experiments, was presented. The tip-induced electric-field enhancements, depolarization incident light, oblique...

SIMOX 3D sculpting is considered as a new method for strain engineering in buried silicon waveguides. A model capable of analyzing the stress distribution and gradient waveguides developed.

A pump-free and reconfigurable all-optical modulation format conversion (MFC) scheme for multiple quadrature amplitude (MQAM) signals by the designed parallel nonlinear Mach-Zehnder interferometers (MZIs) is proposed theory simulated first time. In this scheme, input 30 Gbit/s 8-ary (8QAM) signal divided into two branches 3-dB optical coupler (OC) to get upper lower 8QAM signals. For branch signal, when it injected MZI configuration, converted phase shift keying (QPSK1) can be obtained....