WP1 - High-Power and Highly Single-Mode Zn-Diffusion VCSELs at 940 nm Wavelength
Abstract
Abstract
We demonstrate Zn-diffusion 940 nm VCSELs, which exhibits high-power (6.8 mW), highly single-mode (SMSR>50 dB) performances over the full range of bias currents. A wide -3-dB E-O bandwidth (18 GHz) and a short rise/fall time (20/11 ps) can also be achieved simultaneously.
WP2 - DRIVING GUIDED SURFACE PLASMON MODES ON GOLD NANOWIRES WITH PERPENDICULARLY ORIENTED DIELECTRIC-METALLIC WAVEGUIDE PAIR
Abstract
Abstract
We demonstrate through simulation the excitation of guided modes on a gold waveguide by a perpendicularly oriented Si3N4 waveguide. We can achieve 55% coupling efficiency for a 70 nm Au nanowire, and the ability for mode selection on larger Au nanowires supporting multiple modes.
WP3 - EFFICIENT OPTICAL COUPLING TO ULTRA-LOW MODE AREA SILICON V-GROOVE WAVEGUIDES
Abstract
Abstract
We investigate the coupling performance between conventional silicon strip (Aeff ~ 0.06 µm2) and novel ultra-low mode area V-groove waveguides (Aeff ~ 0.005 µm2) in a directional coupler configuration. We find high peak coupling efficiencies and examine fabrication tolerances and operating bandwidth.
WP4 - ANAPOLE NEAR FIELD LASER BASED ON ALGAAS NANODISK
Abstract
Abstract
A nanolaser using AlGaAs nanodisk is theoretically demonstrated based on anapole state. The radius and height of the nanodisk are optimized to be 240nm and 120nm through geometry tuning based on Mie scattering theory. We have achieved near-field lasing at 1017nm with linewidth around 3.5nm.
WP6 - TEMPERATURE SENSOR BASED ON SELECTIVELY LIQUID INFILTRATED DUAL CORE PHOTONIC CRYSTAL FIBER
- C. Wang (SG) Nanyang Technology University
- P. Shum (SG) Nanyang Technological University
- D. Hu (SG) Institute for Infocomm Research, A*STAR
- Z. Xu (CN) MOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology
- Y. Zhu (SG) Institute for Infocomm Research, A*STAR
- Y. Luo (SG) Nanyang Technological University
- S. Liu (CN) Wuhan Institute of Technology
- Y. Zheng (SG) Nanyang Technological University
Abstract
Abstract
We proposed a temperature sensor by selectively infiltrating refractive index liquid (RIL) in the central airhole of a dual core photonic crystal fiber (PCF). The temperature dependent propagation characteristics of modes in the dual core PCF are analyzed numerically.
WP7 - DISTRIBUTED HIGH-TEMPERATURE SENSING WITH RAYLEIGH SCATTERING BASED IN-LINE FABRY-PEROT INTERFEROMETERS
Abstract
Abstract
A cascaded string of six intrinsic Fabry-Perot Interferometer sensors was fabricated inside a silica fiber using ultrafast laser direct writing, then interrogated by fast white-light interferometer demodulation. Temperature sensitivity between 4.4-13.4nm/0C for up to 8000C at a spatial resolution of 1-cm was acquired.
WP8 - DISPERSION ENGINEERING OF ASYMMETRIC VERTICAL-DUAL SLOT WAVEGUIDES
Abstract
Abstract
Dispersion tailoring of asymmetric vertical-dual slot waveguides in Silicon-on-Insulator is performed. The asymmetry introduced in widths and position of dual slots are utilized to engineer the dispersion characteristics of the photonic waveguide.
WP9 - OPTIMAL RESOURCE ALLOCATION FOR COOPERATIVE HYBRID FSO/MMW 5G FRONTHAUL NETWORKS
Abstract
Abstract
An optimal resource allocation scheme is proposed for cooperative hybrid FSO/mmW 5G fronthaul network to optimize network reliability, average transmitted power and average BER. The numerical results reveal achieving significant improvements in network performance by implementing the proposed scheme, especially at severe weather conditions.
WP10 - AUTOMATED CONTROL OF THE TRANSFER FUNCTION OF AN INTEGRATED CASCADED MACH-ZEHNDER INTERFEROMETER
Abstract
Abstract
Thermal crosstalk and fabrication variations are detrimental to accurate control of integrated photonic systems. We build a calibration-based control algorithm accounting for these factors in a dual Mach-Zehnder Interferometer (MZI) structure, and experimentally demonstrate automated control of optical transmission with only 3% error.
WP11 - POWER AND ACCURACY CO-OPTIMIZATION OF AN OPTICAL FULL ADDER VIA OPTIMIZATION ALGORITHMS
Abstract
Abstract
In this paper, we propose methods to reduce modulation depth requirements of optical modulators in an optical full adder while still maintain the accuracy by optimizing parameters using algorithms. Results show that it is capable of reducing power consumption effectively.
WP12 - GENERAL SCATTERING MATRIX FOR DESIGN OF LINEAR COHERENT NETWORKS USING MICRO-RING RESONATORS
Abstract
Abstract
Starting from the well-known transmission matrix of four port ring resonators we develop a simplified generalized scattering matrix of their phase response for their use in linear coherent optical networks.
WP13 - AN INVESTIGATION ON 25GB/S ULTRA-SHORT CAVITY QUANTUM WELL LASERS OPERATED AT ELEVATED TEMPERATURES
- Y. Tsai (TW) Institute of Photonic System, National Chiao-Tung University
- B. Chen (TW) LandMark Optoelectronics Corporation, No.12, Nanke 9th Rd., Shanhua Dist., Tainan City 741, Taiwan, ROC
- S. Hsu (TW) Institute of Photonic System, National Chiao Tung University
- H. Shih (TW) Institute of Photonic System, National Chiao Tung University
- P. Lu (TW) LandMark Optoelectronics Corporation, No.12, Nanke 9th Rd., Shanhua Dist., Tainan City 741, Taiwan, ROC
- W. Lin (TW) LandMark Optoelectronics Corporation, No.12, Nanke 9th Rd., Shanhua Dist., Tainan City 741, Taiwan, ROC
- C. Lin (TW) Industrial Technology Research Institute / National Chiao Tung University
Abstract
Abstract
1310nm Fabry-Perot QW lasers with ultra-short cavity are fabricated. The shortest cavity length is 25mm, and the laser has mW-class output with low threshold currents. At room temperature, an opened eye diagram with 28Gb/s transmission rate and 25Gb/s eye patterns from 15oC to 65oC are demonstrated.
WP14 - SIMULATION MODEL OF OXIDE-APERTURE STRAIN QUANTUM WELL VCSEL
- H. Shih (TW) Institute of Photonic System, National Chiao-Tung University
- Y. Cho (TW) No. 301, Gaofa 3rd Rd, Guiren Dist.
- S. Hsu (TW) Institute of Photonic System, National Chiao Tung University
- Y. Huang (TW) Institute of Photonic System, National Chiao Tung University
- S. Wang (TW) Institute of Photonic System, National Chiao Tung University
- H. Huang (TW) Institute of Photonic System, National Chiao Tung University
- C. Wu (TW) Graduate Institute of Photonics and Optoelectronics, National Taiwan University
- Y. Yeh (TW) Institute of Electro-Optical Engineering, National Chiao-Tung University
- Y. Lu (TW) Institute of Electro-Optical Engineering, National Chiao-Tung University
- H. Kuo (TW) Institute of Electro-Optical Engineering, National Chiao-Tung University
- C. Lin (TW) Industrial Technology Research Institute / National Chiao Tung University
Abstract
Abstract
An oxide aperture strained quantum well VCSEL model was built based on measured results. The indium composition of MQW was changed to maximize the frequency response. The simulation result shows that the bandwidth can be improved and reach 30.88GHz.
WP15 - ELECTRICAL DETECTION OF COHERENT COUPLING IN VERTICAL CAVITY PHASED LASER ARRAYS
Abstract
Abstract
When operated in the coherently coupled regime, microcavity laser diode arrays have an electrical signature in their differential series resistance. The mechanism of this effect is explained using a complex coupling coefficient in coupled mode rate equation theory.
WP16 - CHARACTERISTICS OF 1.3ΜM ELECTRICALLY PUMPED INAS/ALGAINAS QUANTUM DOT LASERS ON (001) SILICON
- Y. XUE (CN) Hong Kong University of Science and Technology
- W. LUO (CN) Hong Kong University of Science and Technology
- X. WU (HK) Chinese University of Hong Kong
- S. ZHU (HK) Hong Kong University of Science and Technology
- K. LAU (HK) Hong Kong University of Science and Technology
- H. Tsang (HK) Chinese University of Hong Kong
Abstract
Abstract
We present preliminary characterization results of the first InAs/InAlGaAs/InP 1.3μm quantum dots (QDs) laser directly grown on (001) silicon. A threshold current density of 1.05 kA/cm2 under pulsed current injection has been obtained. A 50 ns width optical pulse was observed under gain-switching measurement.
WP17 - BROADBAND NEAR-ZERO DISPERSION WITH MULTIPLE MODE COUPLINGS
Abstract
Abstract
We present a thin silicon nitride waveguide array that achieves a broadband near-zero dispersion profile at near-infrared (1350 - 1800 nm). Multiple mode couplings are introduced at four different wavelengths by coupling different orders of modes.
WP19 - INTERACTIONS OF BRAGG SOLITONS IN A SEMILINEAR COUPLER WITH SEPARATED GRATING AND CUBIC-QUINTIC NONLINEARITY
Abstract
Abstract
We investigate the interactions of solitons in a dual-core system where one core is uniform and has cubic-quintic nonlinearity and the other is linear with a Bragg grating. The effects of system parameters on the outcomes of the interactions are discussed.
WP20 - MOVING GAP SOLITONS IN A COUPLED NONUNIFORM FIBER BRAGG GRATING WITH CUBIC-QUINTIC NONLINEARITY
Abstract
Abstract
The existence and stability of moving gap solitons in a coupled fiber Bragg gratings with dispersive reflectivity in a cubic-quintic nonlinear medium are investigated. The effect of dispersive reflectivity on the stability of solitons is analyzed.
WP22 - FSR ENHANCEMENT BASED ON DIGITAL DESIGN OF MULTI-ETALONS WITH ASYMMETRIC LENGTHS OF CAVITIES
Abstract
Abstract
We present a novel digital design process to synthesize unequal cavity lengths of multi-etalon structures in order to enhance their FSR. As an example, we synthesize a multicavity system with the stop-band rejection of -40dB and 15 times FSR enhancement from a given configuration.
WP23 - DYNAMIC STRAIN MEASUREMENTS BY FIBER BRAGG GRATINGS AND A 100 MHZ DISPERSIVE SPECTROMETER
Abstract
Abstract
We present dynamic optical strain measurements on a metallic cylinder asymmetrically loaded by explosives bands using 24 fiber Bragg gratings distributed along three fibers. The 100 MHz dispersive spectrometer reveals resonances without any electromagnetic perturbations compared to slower electrical strain gauges.
WP24 - QUANTUM CASCADE LASER USING OXIDATION CONFINEMENT LAYERS
Abstract
Abstract
We investigate the oxidization confinement method applied in the active layer of the ridge waveguide Quantum Cascade Laser (QCL). Threshold current of the ridge oxidized QCL is lower than the conventional one, suggesting that the current is constricted by the oxidized layers.
WP25 - OPTICAL FEEDBACK EFFECTS ON THE RELATIVE INTENSITY NOISE OF A MID-INFRARED QUANTUM CASCADE LASER
Abstract
Abstract
We experimentally demonstrate that the relative intensity noise of a quantum cascade laser is insensitive to optical feedback. The feedback induced noise variation is less than 2.5 dB up to a feedback ratio of 31%. Rate equation analysis agrees well with the experimental observation.
WP26 - FREQUENCY NOISE REDUCTION OF QUANTUM CASCADE LASERS USING OPTICAL FEEDBACK
Abstract
Abstract
We theoretically demonstrate that strong optical feedback can reduce the frequency noise of quantum cascade lasers by two orders of magnitude, which is almost independent on the feedback phase. In addition, the spectral linewidth of the laser with optical feedback is analytically derived.