This paper reports the experimental results of silica on a silicon ring resonator in micro optic gyroscope based frequency modulation spectroscopy technique by our research group. The is composed 4 cm diameter waveguide. By testing at λ = 1550 nm, FSR, FWHM and depth resonance are 3122 MHz, 103.07 MHz 0.8 respectively. using polarization controller, curve under TM mode can be inhibited. increased from to 0.8913, namely finesse increase 30.33 33.05. In experiments, there an acoustic-optical...

We establish the equation of distribution refractive index Maxwell fish-eye spherical lenses and report fabrication using optical glasses. The profiles are discussed for process ion exchanging, experimental results accord with theoretical analysis.

Abstract A single-mode single-polarization waveguide (SMSPW) ring resonator for the microoptic gyro (MOG) was proposed, and it could be monolithically integrated onto a silica planar lightwave circuit. We have presented design of three-dimensional SMSPW in which TM mode cuts off TE transmits by taking into consideration stress-induced birefringence effect Si-based using effective-index method. The characteristics light propagation across were studied finite difference beam Numerical...

In this work, the temperature dependence of polarization degree ferroelectric phase barium titanate (BaTiO 3 ) film is first modelled based on a conservation energy-focusing cost microstructural domain cell, and then dual dependences both initial an off-axis tensor electrooptic coefficient ( r 51 modelled. Further, correlation between investigated correlative elasto-optic effects perovskite crystal. With output theoretical models for attributes , numerical simulations are carried out. It was...

Efficient degradation of organic contaminants by oxidative radicals remains a challenge due to invalid consumption and easy generation secondary halogenated pollutants. In this work, novel bimetallic biochar (Cr-Ti/BC) was developed through peroxydisulfate (PDS) activation via nonradical pathway for sulfamethoxazole (SMX) degradation. The mechanisms were (i) metastable reactive complex (Cr-Ti/BC-PDS) formation an interaction between Cr-Ti/BC PDS, (ii) 1O2 electron transfer Cr-Ti/BC-PDS...

Resonator optic gyroscope (ROG) based on Sagnac effect has been investigated over the past years and developed as an attractive device for many applications. micro-optic (R-MOG) with only several-cm-long ring a wafer is promising candidate new generation inertial rotation sensor. Using micro machining process, R-MOG was manufactured silicon or LiNbO3 by etching passive optical resonator devices. It great advantages realizing minitype. kind of detecting resonance frequency difference...

A kind of direct-coupled large-diameter silica on silicon waveguide ring resonator used in microoptic gyro with 4 cm diameter was presented. An optical and electromechanical test platform designed to investigate the performance resonator. The resonance curve, demodulation curve three relative important parameters were obtained. free spectral range resonator, full width at half maximum finesse are 3 GHz, 73 MHz 41, respectively. Open-loop experiments set up using acousto-optic frequency...

A novel silica-waveguide integrated acoustooptic frequency shifter (AOFS) with high diffraction efficiency is proposed for an optical wavelength of 1.55μm in this paper. Choose tapered silica waveguides fabricated on silicon substrates by PECVD and C-axis oriented ZnO piezoelectric films deposited using RF-sputtering as the interdigital transducer excitation SAW. The Al electrodes are located at interface between nonpiezoelectric (SiO₂) films, that is, ZnO/IDT/SiO₂...

The ring resonator is the core sensing element in resonant integration optical gyroscope (IOG) . Its performances influence minimum resolution and error items of directly it key design manufacturing. This paper presents optimal composed Ge02 -doped silica waveguides fabricated on silicon substrates using wide angle beam propagation method (WA-BPM). characteristic light propagating across analyzed. According to results, we succeed fabricating by Plasma Enhanced Chemical Vapor Deposition...

The resonator optic gyro (ROG), which utilizes a resonance frequency change due to the Sagnac effect, is promising candidate for next generation inertial rotation sensor. In this paper, we first analyzed signal detection theory and made demodulation curve modeling. Second, ROG test system set up using laser modulation spectroscopy technique. of detected by photodiode (PD) then demodulated LIA. By testing at λ=1550nm, free spectral range (FSR), full width half maximum (FWHM), depth finesse...

We analyzed the parameters and main noise influence on resonator fiber optic gyro's finesse, put forward way to improve finesse. Then, we built optical ring test system, inhibited polarization fluctuation by using controller polarization-laser, at last took backscattering tests. The experimental results showed that inhibition of has made resonant finesse increase from 64.67 84.57, depth 0.5033 0.7308. At same time, measured intensity ratio Rayleigh light signal 0.0267%. It provides a helpful...

The efficiency of acousto-optic interaction in single-mode strip silica waveguide is analyzed theoretically by determining the overlap integral between optical and acoustic field distributions. results show that there a good SAW fields low frequency range. At high frequencies, decreases with increasing frequency. 216 MHz, maximum 0.8544 for obtained, provided H/Λ equals 0.02. last, diffraction efficiencies MHz are calculated as function square root power different apertures.

We present a design of three-dimensional (3D) silica on silicon single-mode single-polarization waveguide (SMSPW) by taking into consideration the induced birefringence effect silica. This can cut off TM mode and transmit TE mode. The characteristics light propagating across polarization maintaining were simulated 3D beam propagation methods (3D-BPM). result showed that SMSPW has high extinction ratio over 50 dB for Without increasing complexity fabricating process, this structure be used as...

Large-scale optical switching matrix is the core technology of automatically switched network. With significant increase size, study showed that nonlinear factors, such as correlation wavelength, phase and polarization between switches have major impacts for system performance. Because full-size simulation not available now, research will be a great significance we establish an overall model with only considering performance switch unit, but also reflecting structural characteristics...