Coherent injection-locking of colorless laser diode for directly modulated 64-QAM OFDM data at 54 Gbit/s is demonstrated. With enhancing injection power, the suppressed RIN of -104 dBc/Hz and the enlarged SMSR of 50 dB ensure the total raw data rate within 9 GHz bandwidth at a BER of 0.0024.

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An on-chip optical interconnect module with VCSEL/PD and driver/TIA IC are experimentally demonstrated. The 45-degree micro-reflector and trapezoidal waveguide are used to form the unique 3-D optical path. The measured laser-to-PD optical transmission efficiency is -2.19dB. The error-free data transmission of 10-Gbps is also demonstrated.

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Enabled by negative-chirped EAM-SOA, we successfully demonstrate 23-Gbps OFDM transmission in the range of 60~100 km without adaptive bit- and/or powerloading. This distance-insensitive performance reveals the feasibility of simple and efficient OFDMA LR-PON.

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The optical low-coherence interferometry was proposed to demonstrate silicon-wire transverse-electric polarized group-index as 4.325 at 1549.09-nm wavelength using the interferogram shifting and ringdown of the microring resonator, respectively, for the effective length and optical loss.

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On embedding Spatial Light Modulator (SLM) into Mach-Zehnder Interferometer (MZI) to measure optical thickness of object sample is investigated. By using proper coding over SLM, the width of coherence envelope can be broadened, lead to multiple splitting and beat effect. The measuring precision on multi-layer structure of object samples can thus be improved.

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We solve the nonlinear Schrodinger equation on a 1cm Si-on-air waveguide to study the mid-infrared (mid-IR) continuum generation. For a 30fs Gaussian pulse centered at the wavelength of 2.4μm with a peak power of 100W, the spectrum is broadened from 1.75μm to 3.8μm.

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a 2 x 2 multiple-input-multiple-output (MIMO) visible-light-communication (VLC) positioning system is proposed and demonstrated. Experimental results show that it can achieve a bit-error-rate (BER) down to 10-10, while the positioning errors are within 2 cm.

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We utilize the different subwavelength slit structures and the corresponding polarization of light to excite surface plasmon polaritons. The experimental near-field image obtained by scanning near-field microscope was in a good agreement with numerical results and analytical results. The coherence varies of near-field interference depend on the incident wavelength.

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A PCF Fabry-Pérot interferometer formed by chemical etching is proposed. After immersing the PCF tip into BOE, we can remove the air-hole region and reduce the core diameter to 3.7μm. The temperature sensitivity of the PCF FP sensor is -1pm/°C, and it is demonstrated to be employed in RI sensing.

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We propose a probe-typed, microcavity fiber Fabry-Pérot interferometer for refractive index (RI) sensing of liquids. Experimental results show good sensing properties with linear spectral responses and high RI measurement range of nD=1~1.8 to demonstrate the feasibility of acting as a sensitive and practical refractometer.

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Photonic microwave oscillators based on period-one dynamics of semiconductor lasers subject to external injection of a highly correlated optical comb are proposed. While the optical carrier of the optical comb excites the period-one dynamics, a harmonic of the optical combs phase-locks the lower oscillation sideband of the period-one dynamics. Broadly tunable, from a few to hundreds of gigahertz, yet highly stable, down to 1-Hz linewidth, microwave generation can be achieved.

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A two-way fiber-wireless convergence system delivering intensity-modulated and phase-remodulated 10Gbps/30GHz MMW data signals over 40-km SMF and 5-m RF wireless transport is proposed and experimentally demonstrated. Through a serious investigation in systems, BER performs brilliantly.

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Zinc and nickel codiffusion on lithium niobate waveguides fabricated under different diffusion condition were characterized for their compositional and optical properties at a visible wavelength. The measured refractive index profiles of these waveguides demonstrate the dependency with the diffused metal ion concentrations.

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We demonstrate a four-channel 60 Gb/s (4×60 Gb/s) transmission over OM4 fiber of 100 m under OFDM format applying bit-loading algorithm with a commercial 4×1 850-nm VCSEL array.

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An alternative approach to realize complementary metal-oxide-semiconductor compatible integrated Bragg gratings is proposed to allow flexible control of the reflection response. The new grating design enables weak grating coupling strength and adjustable effective index without compromise, thus is relatively insensitive to the grating width variation. The Bragg wavelength of cladding-modulated grating could be tuned by changing not only the grating period but also the core waveguide width without obviously affecting the optical reflection bandwidth.

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We present an optical fiber sensor based on a simple combination of a side-polished fiber and a stress-induced long period grating fabricated on a single-mode fiber pressured between a V-grooved plate and a flat plate. Moreover, this proposed sensor experimentally demonstrates in the measurement of salinity.

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Different nonlinear compensation techniques are compared for the first time, and 57.5-Gbps 60-km IMDD OFDM transmission is achieved. The loss budget of 32 or 29 dB is demonstrated to support 40-Gbps 64-ONUs or 50-Gbps 32-ONUs over 60-km LR-PON without amplifiers.

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Gaussian monocycle and doublet pulses are generated in a ring-cavity erbium-doped fiber laser using passive optical technology. Their pulse shapes and polarity are adjustable by intracavity polarization controllers. The various pulse states are found to be the superposition of bright and dark pulses with different widths, time delays and polarizations.

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This study proposed a fiber sensor based on a fiber Bragg grating (FBG) cascaded with a long-period fiber grating (LPG) for simultaneously measuring the bending curvature and temperature. This sensor can provide a lot of practical industrial applications such as monitoring the temperature and the bending curvature of train tracks.

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Properties of one-degree tilted fiber Bragg gratings are measured. Tilted FBGs made by SMF28 and PS1500 can cause -27.5dB and -25.95dB radiation efficiency, respectively, which are roughly irrelevant to the wavelength.

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The VCSEL consisting of the HCG mirror, an active layer with InGaAsP quantum wells having optical gain around 1.31 μm and a TiO2/SiO2 DBR is designed. Small threshold gain can be theoretically gotten by adjusting the thickness of BCB layer and N-InP layer.

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A hybrid CATV/16-QAM-OFDM in-house network over a combination of 40-km single-mode fiber, 1.43-km photonic crystal fiber, and 30-m graded index-plastic optical fiber/5-m visible light communication transport is proposed and experimentally demonstrated. Good performances of carrier-to-noise ratio, composite second-order, and composite triple-beat are obtained for CATV signal; as well as low bit error rate value is achieved for 16-QAM-OFDM signal.

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To resourcefully composes a phase modulation (PM)-based radio over fiber (RoF) transport systems, a long-reach RoF link with an innovative PM-to-intensity modulation (IM) converter is proposed and experimentally demonstrated. The proposed architecture can utilize a vertical-cavity surface-emitting laser (VCSEL) composed tunable optical bandpass filter to achieve advanced transmission performance.

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We present the polarization beam splitter where short coupling length can be achieved by the controllable birefringence of liquid crystals. To demonstrate the device efficiency at telecommunication wavelengths, we model different rotated angles of liquid crystals and, respectively, calculate their significant extinction ratio based on finite element method.

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Pulse shaping in SOA-based fiber laser was achieved by passive optical technology, and the laser can be operated in continuous-wave, mode-locking, Gaussian monocycle, or chaotic state. Both the RF spectra of Gaussian monocycle and chaotic states can be tuned to comply with ultra-wideband spectral mask of the Federal Communications Commission.

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Design and fabrication of a temperature-insensitive fiber Bragg grating tilt sensor are reported in this study. The tilt sensor can be applied to infrastructure such as bridge, lighthouse and building and can be combined with fiber communications technology to conduct real-time monitoring to achieve the development of high-tech security monitoring system.

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Normalized transmissions of waveguide bends in two-dimensional honeycomb photonic crystal with a complete photonic bandgap are improved to above 0.9 for both transverse electric and transverse magnetic polarizations. The improved waveguide bends exhibit simple structures which can be easily fabricated.

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