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We present a novel 3D sub-wavelength structure with complementary patterns operating in terahertz range. The design exhibits multi-mode resonance at about 0.2 THz, 0.5 THz and 0.7 THz.
We report on intensity based in-line Mach-Zehnder interferometric bend sensor using twin core photonic crystal fiber (PCF). A novel bending sensor is performed with bend induced spatial fringe shift. High air filling fraction of twin core photonic crystal fiber cladding provides immunity to bend-induced intensity fluctuation.
We propose and demonstrate a Sagnac loop interferometer composed of a novel Hi-Bi photonic crystal fiber with two large air holes in the outer cladding region as a curvature sensor. It has been shown that it has an insensitivity to temperature and a curvature sensitivity of 0.159 nm/m-1 when the fiber is bent in the slow axis.
In this paper, we demonstrate 200 Gb/s multi-wavelength optical packet switching with an ultra-fast optical switch. The feasibility has been confirmed by the experimental results.
We investigated the effects of the growth parameters on the microstructural, optoelectronic and low-frequency noise properties of InGaN/GaN multiple quantum well (MQW). Dc current stress was applied to the devices and their degradations were investigated as a function of the stress time.
We highlight recent advances in advanced photonic integration of reliable densely integrated photonic integrated circuits (PIC) and high-index-contrast photonic lightwave circuits (PLC). The applications and benefits of these devices will be presented.
This paper examines the technological challenges in implementing 10 Gb/s Transimpedance Amplifiers in standard CMOS process technology. Circuit techniques for enabling 10 Gb/s CMOS circuit operation are discussed. Paper concludes with measurements results for an actual 10 Gb/s CMOS Transimpedance Amplifier.
We investigated the PANDA type polarisation-maintaining optical fibers which were drawn VAD synthesized preforms with stress-applying parts (SAP) by VAD method. The fabricated fiber has 1.3 mm beat length in the 633 nm region, and -25 dB/km crosstalk. So this fiber can be used in precision gyroscope system.
A fiber Bragg grating at twice the Bragg wavelength was fabricated by a standard phase mask technique and its two peaks/dips are attributed to the interleaved refractive index modulations along the fiber core that produced a pi-phase-shifted grating.
We propose and demonstrate an accurate and one-end accessible BOTDA system by round-tripping the pump and doubly phase-modulated probe lights through the sensing fibers with a Faraday rotation mirror. The availability of the method is experimentally confirmed.
A novel OFSK transmitter using phase modulator-embedded optical loop mirror and carrier suppression modulation is proposed and experimentally demonstrated. Only one laser source is needed and its structure is simple for potential integration.
We review our work on short-wavelength transverse single-mode or multimode VCSELs that show stable linearly polarized light output owing to the incorporation of surface gratings. An emphasis is put on optical sensing and communications applications.
This paper reviews recent research undertaken in the Optical+Biomedical Engineering Laboratory on the application of anatomical optical coherence tomography to endoscopic imaging. The technology is demonstrated for the assessment of pathologies of the human lower airway.
A scheme of monitoring a building or an apartment complex over WDM-PON is suggested. CDMA coding is used in transmitting sensor data from multiple ONTs to a receiver in the management center that is located near remote node.
We propose targeted coherent control of light confined near a quantum dot embedded in three-dimensional photonic crystals, which provides the basis of quantum information processing that can be used for nano-photonics devices.
Transmission of a single mode fiber with a cross-sectional micro-channel is investigated by two dimensional time-domain finite difference method for the first time. Index-sensing capabilities are defined from the simulation results.
We propose an in-line monitoring technique with visible light by using 1.3 mum-band QPM-LN. We measured 650 nm SH power and Q factor of received data (1.25 Gb/s) to verify the effectiveness of proposed technique.
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