Session Index

Humidity sensitivity and response dynamics of layer-by-layer thin film deposited on a hetero-core structured optical fiber was investigated. Four kinds of poly anion, carboxymethyl-dextran, poly acrylate, polyvinyl sulfate and alginate, were evaluated as humidity sensitive materials and the doping of hygroscopic material in the film was tested.

 

We derived analytic expression of the maximum electric field for the central and edge region of an APD. Simulation showed that the maximum electric field in the edge location is only higher than central region by 1.76%, which is expected giving negligible effect on the multiplication process of the APD.

 

The effects of number of UVC LEDs on aluminum alloy substrates and water flow conditions on the temperature of UVC LEDs module operating inside the water Treatment equipment is investigated by COMSOL Multiphysics numerical simulation software. UVC LEDs with a input power of 1.2 W and a wavelength of 280nm

 

In this paper, two kinds of high reflection (97%) and low delay time loop mirror system, Y-splitter mirror and direction coupler mirror, has been designed in silicon photonic application to enhance the problem that low extinction ratio in Ge-based EAM.

 

In 15mm length SiO2 cladding high order mode anomalous dispersion Ta2O5 channel waveguide with dimension of 1500nm x 700nm was also designed and fabricated successfully. Almost 1.4 octave spanning was investigated. This is first time, to our best knowledge, SCG can be realized from high order mode nonlinear waveguide.

 

We propose a novel polarization beam splitter based on decoupling control which is consisted of two symmetric rib waveguides. The device is designed to decouple TM mode. Meanwhile, the TE mode is coupled to the cross port at an appropriate coupling length.

 

The chlorophyll fluorescence of green leaves, show two maxima near 690nm and 740nm. The fluorescence ratio F690/F740 variation in leaves during water stress is determined by the variation in chlorophyll content. The new optical fiber device detect plant water stress is more stable and reduces errors than the traditional measure.

 

We demonstrated a fiber Bragg grating sensing system which can achieve the ability of AC/DC power measurement in real time. Dynamic range of real time measurement from 0 V to 120 V with resolution as small as 5 V was achieved by this fiber sensing system.

 

This paper proposes a dual-band microwave and millimeter wave generation module based on a polarization modulator. A distributed feedback laser is directly modulated and externally modulated by a radio frequency signal. Through twice modulation, the frequency doubling and quadrupling signals can be generated.

 

We propose the use of multilayer Feed-forward neural networks (MFFNN) technique for detecting Bragg wavelength shifts in fiber Bragg Grating Sensors (FBG). Simulation and experimental results show that the technique provides higher detection accuracy than the Conventional peak detection technique.

 

Herein, we design and fabricate a 25-Gb/s SFP28 LR optical transceiver module using Maxim’s MAX24033 IC, and TO-CAN packaged DFB laser and photodiode. In this module, a six-layer PCB was used, the top and bottom layers were the high-frequency signal layers, and the via design of the PCB was optimized.

 

In last few years, super continuum generation (SCG) of which the spanning spectrum is believed to depend on the location of dispersive wave (DW) has been attracted plenty of attention. In this work, using the nature of high optical nonlinearity of Ta2O5, the role of dispersive wave was investigated.

 

We numerically investigate the influence of heat load on optical fiber modes. Numerical results show that, as the heat load increases, the effective index will increase and the mode field diameter will decrease. Moreover, the results obtained with uniform and nonuniform heat load distributions will diverge with increasing heat load.

 

A kind of microstrip line that can transmit spoof surface plasmon polaritons has been presented by introducing periodic subwavelength corrugation in the edge of metal strip. We use the circuit model to extract the capacitance of the structure. This will allow us to obtain a accurate impedance of the line.

 

A surface plasmon resonance D-shaped PCF sensor with the metallic diffraction grating based on hybrid SPR mechanisms has been investigated. In this novel SPR sensor, the sensitivity is enhanced successfully by using the two SPR mechanisms. It shows high sensitivity of 50,000 nm/RIU compared with previously published results.

 

An angled fiber array with mini ×4 MT ferrule is proposed for grating coupling of a Si photonic integrated circuit. The coupling loss of the angled-fiber coupler with MT ferrule is-10.1dB, which is about 1.1dB higher than that of the conventional vertical fiber coupling technique.