Design and fabrication of a plantar pressure sensor based on fiber Bragg gratings are reported in this study. The foot length can be separated into three parts in proportion: forefoot, midfoot, and hindfoot. In this work, three parts measure six areas. Experimental results show that this system is feasible and has stable performance in measurement.

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High-Q elliptical microresonators on LiNbO3 are fabricated and its coupling characteristics are studied. The coupling position of the tapered fiber determines the coupling characteristics and the transmission spectrum. Strong coupling occurs at the position with the smallest curvature radius due to longer extension of evanescent field. The measured maximum intrinsic and external Q factors are 2.4×104 and 1.1×105.

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The integrated polarization tunable phase modulator (PTPM) is proposed for the applications of homodyne interferometers. Compared with existing waveplatetype devices for the modulations of polarization states, the PTPM is compact and flexible for the different measurement wavelengths.

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In this paper, we propose an all-optical flip-flop based on the MMI PCW. Through shifting the boundary waveguide of the control ports, we can make outgoing field propagate in output waveguide or not. The intensity profiles show snapshots optioned at different times. This present result demonstrates that RS flip-flop operation is possible by using double different waveguide’s width and a MMI coupler waveguide in a PCs platform. Note that if we have an RS flip-flop, we can realize various much complex logic processing based on it.

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Abstract - This paper studies the dispersion relation of one-dimensional photonic crystal waveguide structure. Periodically arranged on both sides of the waveguide structure by a dielectric material (cladding), an intermediate layer sandwiched between the defect (core) formed. We use the plane wave expansion method to calculate the group velocity of the waveguide structure with different wavelengths to obtain a dispersion relation of the waveguide structures of different wavelengths.

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In this article, we proposed a band-stop plasmonic filters based on metal-insulator-metal (MIM) nonlinear nanodisk resonators. The band-stop filter is made up of an MIM waveguide coupled to nonlinear nanodisk resonators. The band-stop of the proposed plasmonic waveguide structure can be easily manipulated by adjusting the geometrical parameters and coupled-aperture width of the nanodisk resonators. The results are obtained by a 2D finite-difference time-domain (FDTD) method. It would be a potential key component in the application of the plasmonic integrated circuits.

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A PCF sensor based on surface-plasmon resonance is proposed and modeled with the finite element method. The fiber sensor can be manufactory by side-polishing a photonic crystal fiber and sputtering the metal thin-film on polished plane. We evaluate the performance of the fiber sensor.

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In this paper, a 10-Gb/s four-level pulse amplitude modulation (PAM-4) optical receiver circuit is designed in 0.18-μm CMOS technology. The bandwidth of this circuit is about 5-GHz, but its data transmission rate can be 10-Gb/s. Using lower bandwidth devices, the circuit can be still operated at high data rate.

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This report proposes an evaluation model of establishing all optical network element with monopoly advantage from the practical point view of intellectual property protection. Evaluation of budge investment and patent advantage are critical in setting all optical network clock source.

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In this paper, we propose a method to explore the electric field distribution of the three-layer metamaterial waveguide with nonlinear DPS cladding. The propagation characteristics of the transverse electric (TE) waves are investigated analytically and numerically in this structure . The numerical results show that the electric field distributions are peculiar at the boundary between the metamaterial and the nonlinear DPS medium.

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In this study, two different type fibers are investigated, and their optic characteristics are characterized. The minimum mean propagation loss of the solid fibers is 0.004975db/cm. The minimum mean propagation loss of the liquid fibers is 0.147db/cm.

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We numerically investigate a high sensitivily plasmonic bowtie antenna which is embedded in a silica substrate. Results show that the near-field intensity becomes less intense and the spectrum of peak resonances red-shifted as the embedded depth is increased.

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A novel kind of spoof surface plasmon polaritons is investigated. Numerical and experimental results show that by introducing the open slot on the metallic blocks, there will appear additional spoof SPPs mode in the band gap of metallic solid blocks. The addition mode can generate a frequency steering pencil-like radiation with a dispersion curve passing entering the radiation region.

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In this paper, a nano-scale wavelength-selective optical filters is based on metal-insulator-metal square ring with a split-ring core (SRC). These resonant modes are highly adjustable, via the gap size of the split-ring core, over a range of hundreds of nanometers. The resonator has the potential to be utilized effectively in integrated nano-scale optical switches and tunable filters.

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In this paper, we used a commercial shaper to achieve the adaptive control of pulse shape of 1550nm mode-locked Er:fiber laser. Freezing phase algorithm is used for producing reference transform-limited pulse. Besides, we have also demonstrated an arbitrary waveform generation by adaptive Gerchberg-Saxton algorithm.

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An all-in fiber Mach-Zehnder interferometer (MZI) is proposed by automatically fusion splicing a short section of hollow core fiber (HOF) to the end of a single-mode fiber (SMF) and sandwiching a section of HOF in two section of SMF. Due to the liquid crystal (LC) material has high electric fields sensitivity, a novel in-line MZI formed by a vertical alignment (VA) LCs-filled HOF is demonstrated as a voltage sensor. The voltage induced wavelength shifts of the interference fringes are experimentally monitored. The experimental results show that the wavelength-voltage sensitivity is ~0.0225 nm/V, the resonant wavelength blue shift 9 nm was achieved by the voltage from 0V to 400V.

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In this work, the fabrication method of CMOS-compatible low-loss Si waveguiding structures by KrF Excimer laser reformation system is studied. The study solves the on-chip integration issues between electronics and photonics, as well as reduces the propagation loss for on-chip optical interconnect applications. Under proper laser treatment, the propagation losses are reduced from 4.2 ± 0.2dB/cm to 2 ± 0.2 dB/cm.

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A fiber sensor based on long period grating for refractive index measurement is presented. In order to reduce the cost of pure oil, the merchants usually adulterate large quantity of cottonseed oil into pure oil. It shows that the proposed sensor for olive oil mixed by cottonseed oil with concentration of 5 % to 50 %, could be effectively detected.

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A tunable fiber filter with three fiber Sagnac interferometers has been designed and employed in a fiber ring laser to tune the laser emission wavelength. The tuning of the fiber filter is easy and linear, and the tuning sensitivity of the fiber ring laser can be up to 0.08 nm/um.

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Three-output power splitter in planar photonic crystal of air-hole type is designed and simulated. Two capsule-shaped air holes are employed to tune power ratio and one circular air hole is used to improve impedance matching at the junction. Equal-power splitting with normalized transmission efficiency 0.962 is achieved.

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Homogeneous and heterogeneous fiber splice characteristics of the bending insensitive optical fiber have been developed and applied to the construction of the client part of the FTTH system successfully. The result of this research can also be applied to the bending insensitive optical fiber related optical network construction.

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Phase shift by continuous air-hole defects in photonic crystal waveguide with a triangular lattice is studied. Phase shift can be introduced by varying radius of or number of air-hole defects. Finally, a compact Mach-Zehnder interferometer is designed to show a 180-degree phase shift.

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A hybrid lightwave transmission system based on single-mode fiber and vertical cavity surface emitting laser-based visible laser light communication convergence with light injection and optoelectronic feedback techniques is proposed. Over a 40-km SMF and a 10-m free-space VLLC transport, carrier-to-noise ratio/composite second-order/composite triple-beat/bit error rate perform brilliantly for CATV/16-QAM/16-QAM-OFDM signals transmission.

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An application of point-symmetric directional coupler on power divider for two-dimensional photonic crystals is proposed. The coupling efficiency with respect to the radius of dielectric rods of coupling region is simulated and analyzed.

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mainly using intensity modulator is loaded local oscillator of 15GHz to generate optical double sideband, and then separation of the central carrier and subcarrier is used fiber Bragg grating, transmission to the client through different paths do signal quality testing. Structure

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To address the inherent latency problem of first person shooter (FPS) in access network, a new queuing scheduling in optical network unit (ONU) architecture in Ethernet passive optical network (EPON) is proposed to guarantee packet delay of FPS. The proposed architecture improved traffic delay based on inserted FPS game (FPSG) queue in ONU with the second priority.

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A tunable fused tapered single-mode fiber coupler with wide working wavelength range has been demonstrated. The tunable characteristic is based on the bending effect of the coupling region of the coupler. The working wavelength range of the tunable coupler can be up to 77 nm.

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