Kan Yu

• Huazhong University of Science and Technology

A composite was created by incorporating the quantum dot-enhanced SiO2 nanoparticles within this hydrogel. Based on this composite, a temperature-controlled fluorescent probe for DCP was developed. A meticulous examination of this probe revealed its attributes and factors affecting its performance. By using temperature modulation, the probe was ade...

A novel fiber optic sensor based on hydrogel-immobilized enzyme complex was developed for the simultaneous measurement of dual- parameter, the leap from a single parameter detecting fiber optic sensor to a fiber optic sensor that can continuously detect two kinds of parameters was achieved. By controlling the temperature from high to low, the funct...

The active oxygen species in the catalytic oxidation system of Fe(III)PcTs-t-BuOOH were identified, and the mechanism of the catalytic oxidation of phenolic substrates was proposed. Quinone imine molecules, the main products of catalytic oxidation reaction, can be adsorbed on the surface of CdTe QDs, resulting in their fluorescence quenching. A dua...

A novel fiber optic sensor based on optical composite oxygen-sensitive film was developed for determination of 2,4-dichlorophenol (DCP). The optical composite oxygen-sensitive film consists of tris(2,2′-bipyridyl) dichloro ruthenium(II) hexahydrate (Ru(bpy)3Cl2) as the fluorescence indicator and iron(III) tetrasulfophthalocyanine (Fe(III)PcTs) as b...

With the development of the optics communication system and optical signal modulation technology, the amplitude-shift keying (ASK) and phase-shift keying (PSK) are both used in different optical communication sub-networks. In this paper, a novel all-optical modulation format from PSK to ASK based on phase-sensitive amplification is proposed and dem...

The rectangular optical filter is one of the most important optical switching components in the dense wavelength division multiplexing (DWDM) fiber-optic communication system and the intelligent optical network. The integrated highorder silicon microring resonator (MRR) is one of the best candidates to achieve rectangular filtering spectrum respons...

Conventional angle-tuned thin-film filters have serious angle sensitivity for their low spacer effective refractive index, and it is difficult to fabricate their angle control system. In this paper, we propose and fabricate a novel 100 GHz angletuned thin-film filter stack with low angle sensitivity, which uses the high refractive index material Ti...

An angle-tuned thin film narrowband filter is widely used in the dense wavelength division multiplexing (DWDM) system. With increase of incident angle of the thin film filter, the central wavelengths of both S-polarization and P-polarization will separate obviously and shift to short wavelength much faster, which will cause serious polarization sen...

Multilayer dielectric thin film edge filter has serious polarization sensitivity under oblique incidence. The cutoff-bands of the s-polarization and p-polarization light in conventional edge filter will separate obviously under 45° oblique incidence, which limits its application. Based on the two chosen materials TiO2 and SiO2, a novel stack struct...

As the thin-film filter is used in oblique incidence, the central wavelengths of the ppolarization and s-polarization will separate obviously, which will cause serious polarization dependent loss. With the analysis of phase relationship, the value of moderate refractive index can be obtained to coincide the central wavelengths of both polarizations...

As a tunable optical filter, angle-tuned thin film narrowband filter is widely used in dense wavelength division multiplexing (DWDM) system. In oblique incidence, the transmitting facular broadens obviously, which will cause a decrease in transmissivity and rectangular degree of the filter. The transmitting spectrum characteristics and the transmit...

Angle-tuned thin film bandpass filter is widely used in DWDM system. In oblique incidence, the bandwidths and central wavelengths of the P-polarization and S-polarization light will separate obviously, which will cause serious polarization dependent loss. These phenomena of the polarization sensitivities are analyzed and a novel non-polarization 10...

Angle-tuned thin film filter is widely used in the DWDM system for its broad tunable wavelength range and high rectangular degree. The transmissivity and the half bandwidth is greatly influenced not only by the incident angle, but also by the wedge angle of the non-paralleled thin film filter. In the present paper, the influences of the wedge angle...

For a three-port angle-tuned thin film filter, the characteristic of reflected-port is very important to reflect multiple wavelengths spectrum. As the filter is in tilted incidence, the reflected-facula broadens and the reflectivity decreases. In this paper, we proposed a frequency recursive algorithm based on fast Fourier transform and Fresnel for...

The bandwidth of the S-polarization and the P-polarization modes will separate while the narrowband thin-film filter is in oblique incidence, which will cause serious polarization dependent loss and limit its tunable range. The phenomenon of the polarization bandwidth separation and its relationship to the mirror layers of the thin-film filter are...

The design of a simple flexible multi-wavelength reconfigurable add-drop multiplexer (ROADM) based on the thin-film filter is presented. By the controlling of a stepping motor, the ROADM can add or drop one selective wavelength because the incident angle of the thin-film filter is changed. The crosstalk of the ROADM is analized and calculated in de...

According to the tilted incidence characteristics of thin film narrowband filter, a stack of 100-GHz DWDM four cavities angle-tuned narrowband thin-film filter with low polarization dependent loss has been designed and optimized. Using the angle-tuned filter, we developed a novel three-port tunable optical filter. The crosstalk of the tunable filte...

According to the oblique incidence characteristics of thin film narrowband filter, the stack of 100GHz DWDM four cavities angle-tuned thin film filter has been designed and optimized. The two polarization modes’ central wavelengths of the thin film filter can be centered at the same one in oblique incidence, and it has a stable tuning range of 20nm...

For a 100 GHz DWDM angle-tuned filter with low polarization dependent loss, the insertion loss and the Gaussian-transformation tendency of the transmission spectrum will become more serious as the incident angle is increased. It is because of that the optical path and the transmission modes of the thin film filter will change when the incident angl...

Thermal stress effects on the mode field characteristics of arrayed waveguides are studied precisely by finite element method (FEM) with plain strain model. The amplitudes of Ex and Ey are comparable for the Ex11 mode and the Ey11 mode in a homogeneous and isotropic optical channel waveguide. Considering the elasto-optic effect, the refractive indi...

Analytical solutions are very useful to understand influence factors in the central wavelength temperature sensitivity of AWGs (arrayed waveguide gratings) and convenient to be used in preliminary design. In this paper, the elastic multilayer theory and stress concentration effect are combined to estimate thermal stresses in arrayed waveguides. Eff...

According to the tilted incidence characteristics of thin film narrowband interference filter, the stack of four cavities angle-tuned narrowband filter with low polarization dependent loss is designed. Using this kind fo angle-tuned thin film filter, one new structure of three-port tunable filter is developed. The experimental results show that its...