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We present a microwave photonic notch filter based on a Si3N4 photonic chip, with a noise figure of less than 20 dB, a positive link gain and an ultra-deep rejection beyond 50 dB in the stopband. This level of performance is achieved by using on-chip resonators' unique phase responses, and thorough optimizations of the photonic link.
Here we show a new approach to create a sharp tunable microwave bandstop filter. Using a low Brillouin loss of ∼3 dB, we achieved 20-dB extinction filter over a tunable bandwidth of up to 1 GHz with a central frequency tuning range of 16 GHz.
A core-shell structure based on three-dimensional micro-cuboids connected by photonic nanojets is proposed with the aim for power enhancement of surface plasmon polaritons. The performance of the core-shell micro-cuboid is evaluated and compared with the dielectric micro-cuboid. The dependence of the power enhancement with the metallic shell is also evaluated and demonstrated that the metallic shell...
We demonstrate BPSK modulation using a silicon traveling-wave modulator at data rate up to 48 Gb/s, with 7.4 Vpp differential RF driving voltage. The performance of the silicon BPSK modulator is compared with a commercial Lithium Niobate phase modulator, showing better dispersion tolerance.
HVDC transmission lines operating in polluted areas may absorb a large amount of contamination, which seriously affects the corona discharge and its associated audible noise, electric field, ion current density from the transmission lines. To fully study the effects of conductor surface condition on photon count and dc electric field, conductors coated with different kinds of contamination were investigated...
A method incorporating controllable mode interaction is proposed for Kerr frequency comb generation in normal-dispersion microresonators. Repetition-rate-tunable combs and broadband mode-locking transitions are demonstrated by using dual silicon nitride microrings.
An efficient polarization beam splitter (PBS) based on a silica microcapillary is proposed and experimentally demonstrated. This PBS relies on the inherent-geometry-induced birefringence. A maximum extinction ratio of up to 25 dB is achieved.
We investigate several interesting effects related to normal dispersion micro resonator combs, including comb generation behavior affected by mode coupling and mode-locked tunable broadband comb generation.
We present the first photonic nanojet analysis in the non-spherical micro-particles. The electric intensity distributions in the vicinity inside and outside a non-spherical micro-particle have investigated by using the finite-difference time-domain calculation. The non-spherical micro-particle is truncated by the cutting thickness. The shape dependence of the photonic nanojet has been investigated...
By employing low dark count up-conversion single photon detectors, we have experimentally demonstrated the passive decoy-state method over a 50-km-long optical fiber and have obtained a key rate of about 100 bit/s.
Mode interaction in silicon nitride micro-resonators is investigated. We provide clear experimental evidence of mode interaction between two families of transverse modes and demonstrate a link between such interactions and initiation of comb generation in resonators with normal dispersion.
We present a 30 GHz silicon photonic platform that includes low-loss passive components as well as high-speed modulators and photodetectors. The platform is available to the community as part of the OpSIS-IME MPW service.
We demonstrate an electrically tunable resonant filter with FSR-free operation using a silicon photonic quarter-wavelength phase-shifted, grating-assisted contra-directional coupler. The spectrum shows a stop-band of 7nm, an extinction of 24dB, and a Q of 7,000.
Anodic aluminum oxide (AAO) is fabricated by electrochemical anodization of aluminum. This work is focused on the optimization on the diameter of the pores in anodic aluminum oxide (AAO) template. The Al sheet (20 × 20 × 0.15 mm) and Al (1 μm) deposited on silicon wafers (p-type) were used for anodic aluminum oxide (AAO) growth. The growing time, temperatures, kinds of electrolyte, working voltage...
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