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We demonstrate for the first time a phase stabilized Kerr comb without the use of external references or non-linear interferometry. Out-of-loop measurements confirm good coherence and stability across the comb, with measured optical frequency fractional instabilities of 5×10−11/√τ
We report a novel way to generate frequency comb in normal GVD microresonator. By using single FSR intensity-modulated pump, we successfully observe a mode locked frequency comb and bright square pulse for the first time.
We demonstrate high-bitrate coherent optical OFDM transmission utilizing low-noise Kerr frequency comb as multi-channel laser source. 4QAM-OFDM data with total bitrate of 136.0 Gb/s are successfully transmitted over a 100 km fiber link.
We report a Si3N4 microresonator which simultaneously satisfies single-mode operation, high Q-factor and anomalous dispersion. With controlled high-speed pump-wavelength scanning, we successfully observe a smooth phase-locked Kerr frequency comb transition based on dissipative solitons.
We report a Si3N4 microresonator which simultaneously satisfies single-mode operation, high Q-factor and anomalous dispersion. With controlled high-speed pump-wavelength scanning, we successfully observe a smooth phase-locked Kerr frequency comb transition based on dissipative solitons.
Here we present an optomechanical accelerometer with DC resolution at 730ng/Hz1/2 that when driven into sustained-oscillation mode, the slot photonic crystal cavity provides a radio-frequency (RF) readout of the optically-driven transduction with an enhanced sensitivity of 196 ng/Hz of RF shift. This advanced sensitivity as well as the solid-state room-temperature silicon architecture make the DC...
An on-chip refractive index (RI) sensor with high sensitivity and large measurement range is demonstrated. The sensing scheme presented here is based on Mach-Zehnder interferometer configuration built on an SOI wafer. The measured wavelength sensitivity reaches 3498.6 nm/RIU (TE-mode). Meanwhile, according to the period changes of interference patterns, the measured period sensitivities are 20.4 nm/RIU...
We report a half-octave-spanning Kerr frequency comb which has the record-low phase noise floor with −130 dBc/Hz at 1 MHz offset for 18 GHz carrier frequency, and long-term Allan deviation of 7×10−11/τ0.84 with active stabilization.
We demonstrate real-time single-shot dynamics of soliton spectral broadening and Cerenkov radiation predominately induced by slow-light enhanced free-carrier nonlinearity in silicon photonic crystals. Ultra-stable free-carrier dispersion based continuum generation is identified for the first time.
This paper demonstrates the optically induced self-excited relaxation oscillation in a silicon ring resonator for the first time. The observed thermo-optomechanical oscillation has a unique waveform with fast oscillation period close to 16 ns and slow oscillation period approximately 167 ns. The ultra-fast oscillation period can be well used in optical switch and optical memory elements. Particularly,...
This paper reports a NEMS spectrometer-on-a-chip, which integrates fiber-waveguide coupler and photo detector on a single silicon chip. Spectrometer based on Fourier transform, for the first time, has been miniaturized into a waveguide based silicon photonic chip. The on-chip spectrometer is fabricated by nano-silicon-photonic fabrication processes. It also eliminates moving parts and confine light...
Continuous separation of nano-sized molecules has great importance in biomedical applications. This paper represents a near-field optical approach to separate nanoparticles using speckle patterns. Near-field random light patterns (speckle pattern) are generated by the repeated coupling and interference of light in nano-waveguide arrays. The movements of 2-µm and 0.5-µm particles are studied under...
A tunable flat lens is demonstrated based on reconfigurable metasurface, which is realized via changing the phase gradient of the metasurface in sub-wavelength level. The sub-wavelength metamolecules are formed by enclosing a liquid metal plug within microfluidic cavities, which can be tuned by changing the geometry of the metamolecules. The tunable flat lens is consisted of soft material with controllable...
We experimentally demonstrate a silicon nano-wire actuator with a nano-scale resolution and tunable actuation range. The nano-scale resolution is obtained through implementing different control regulations, including coarse tuning by the electrostatic force and precision tuning by the optical force. More specially, the optical force enabled silicon nano-wire actuator can break the classical NEMS 1/3...
This paper reports a novel all-optical light tracker by taking advantage of the optomechanical modulation. The optical force generated by a light can be used to control another light without relying on the traditional nonlinear material. Particularly, the all-optical modulation can transfer the information in a signal light into another tracking light without resorting to electro-optical converting...
This paper reports a NEMS integrated photonic system, which integrate tunable laser, optical cross correct and variable optical attenuators. The NEMS integrated photonic system is fabricated with nano-silicon-photonic fabrication technology to integrate various functions in a single silicon photonic circuit chip. The high light-confinement capability of the nano-silicon waveguides guarantees superior...
Esophageal cancer is aggressive and has poor prognosis. Esophageal squamous cell carcinoma (ESCC) is histologically the most prevalent type of esophageal cancer and ranked as the sixth leading cause of cancer death worldwide. In recent years, cancer has been widely regarded as genetic disease, as well as epigenetic abnormalities including DNA methylation, histone deacetylation, chromatin remodeling,...
This paper presents a compact silicon-photonic based optical cross connect (OXC) driven by the optical gradient force. Each switch element consists of a waveguide-crossing-coupled micro-ring resonator and a suspended arc. The device is fabricated with a standard CMOS compatible process using deep-UV 248-nm lithography with a double-etch technique. A switching time of 0.24 µs is experimentally demonstrated...
We develop a miniaturized electrostatically tunable optomechanical oscillator, whose frequencies can be electrostatically tuned by as much as 10%. By taking advantage of the optical and the electrical spring, the oscillator achieves a high tuning sensitivity without resorting to mechanical tension. Particularly, the high-Q optical cavity greatly enhances the system sensitivity, making it extremely...
This paper reports an on chip nano-optomechanical SRAM, which is integrated with light modulation system on a single silicon chip. In particular, a doubly-clamped silicon beam shows bistability due to the non-linear optical gradient force generated from a ring resonator. The memory states are assigned with two stable deformation positions, which can be switched by modulating the control light's power...
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