A5079787262- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Photonic Crystals and Applications
- Optical Network Technologies
- Advanced Fiber Optic Sensors
- Advanced Photonic Communication Systems
- Mechanical and Optical Resonators
- Advanced Fiber Laser Technologies
- Neural Networks and Reservoir Computing
- Optical Coatings and Gratings
- Quantum Information and Cryptography
- ZnO doping and properties
- Plasmonic and Surface Plasmon Research
- Semiconductor Quantum Structures and Devices
- Nuclear reactor physics and engineering
- GaN-based semiconductor devices and materials
- Advanced optical system design
- Fault Detection and Control Systems
- Advanced Data Processing Techniques
- Risk and Safety Analysis
- Laser and Thermal Forming Techniques
- Laser-induced spectroscopy and plasma
- Vibration and Dynamic Analysis
- Advanced Battery Technologies Research
- Advanced Manufacturing and Logistics Optimization
Samsung (South Korea)
2025
Electronics and Telecommunications Research Institute
2014-2024
Daewoo Shipbuilding and Marine Engineering (South Korea)
2016-2021
Seoul National University
2004-2021
Daejeon University
2021
Russian-Armenian University
2018
University of Trento
2018
Korea Research Institute of Ships and Ocean Engineering
2017
Korea University of Science and Technology
2015
Korea Electrotechnology Research Institute
1998-2006
In this paper, we investigate the temperature dependence of a silicon-on-insulator-based silicon nanophotonic ring resonator covered with polymeric overlayer. Temperature-dependent wavelength shift is measured to be as low 5 pm/degC for TM mode in composed 500 times 220 nm <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> channel waveguide. We also show through simulations and experiments that can reduced TE or both modes by adjusting volume
We show that the temperature dependence of a silicon waveguide can be controlled well by using slot structure filled with polymer material. Without slot, amount temperature-dependent wavelength shift for TE mode ring resonator is very slightly reduced from 77 pm/ degrees C to 66 (WIR30-490) upper cladding instead air cladding. With same polymer, however, reduction improved pronounced and down -2 adjusting several variables structure, such as width between pair wires, wire pair, height slab...
We present high performance silicon photonic circuits (PICs) defined for off-chip or on-chip interconnects, where PN depletion Mach-Zehnder modulators and evanescent-coupled waveguide Ge-on-Si photodetectors were monolithically integrated on an SOI wafer with CMOS-compatible process. The fabricated PIC(off-chip) optical interconnects showed operation up to 30 Gb/s. Under differential drive of low-voltage 1.2 V(pp), the 1 mm-phase-shifter modulator in demonstrated extinction ratio (ER) 10.5dB...
This paper aims to present the design and achieved results on a CMOS electronic photonic integrated device for low cost, power, transparent, mass-manufacturable optical switching. An unprecedented number of components (more than 1000), each individually electronically controlled, allows realization transponder aggregator which interconnects up eight transponders four direction colorless-directionless-contentionless ROADM. Each supports 12 200-GHz spaced wavelengths, can be independently...
<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> We introduced shallow-etched silicon nanowire into the arrayed waveguides to decrease random phase error due core width fluctuation. A fairly improved crosstalk value of 18 dB was achieved in fabricated arrayed-waveguide grating with on-chip loss 3 dB. </para>
This paper reports the performances of a silicon photonics optical switch matrix fabricated by using large-scale three-dimensional (3-D) integration. The wavelength selective consists photonic integrated circuit (PIC), with 1398 elements, interconnected in 3-D stack its control electronic (EIC). Each PIC element can be trimmed or reconfigured metallic heaters. EIC is designed to drive heaters and read signal monitor photodiodes into PIC. Small footprint high energy efficiency are achieved...
We demonstrate sub-dB/cm propagation losses in polymer-based silver stripe waveguides at the wavelength of 1.31 microm. The were fabricated a low-loss fluorinated polymer clad. To form uniform metal patterns, which are essential for reducing loss, we developed lift-off process using double layers photoresist and SiNx. A loss less than 1.0 dB/cm was obtained with 11- nm-thick stripes width range 1.5 - 4.5 coupling approximately dB polarization maintaining single mode fiber achieved For 2.0...
The authors investigate efficiency and electron leakage characteristics in GaN-based light-emitting diodes (LEDs) without AlGaN electron-blocking-layer (EBL) structures. Both simulation electroluminescence (EL) measurement results show that the internal quantum decreases rapidly as thickness of an undoped GaN interlayer between active layers a p-GaN layer increases, which is caused by from to due inefficient hole injection. However, photoluminescence (PL) quality deteriorates decreases. EL...
A light-emitting diode (LED) structure containing p-type GaN layers with two-step Mg doping profiles is proposed to achieve high-efficiency performance in InGaN-based blue LEDs without any AlGaN electron-blocking-layer structures. Photoluminescence and electroluminescence (EL) measurement results show that, as the hole concentration p-GaN interlayer between active region layer increases, defect-related nonradiative recombination while electron current leakage decreases. Under a certain...
We fabricate silicon waveguide spirals and a ring resonator to generate photon pairs based on spontaneous four-wave mixing. The coincidence-to-accidental-ratio (CAR) of from the waveguides is measured up 400 after noise-filtering by using combination bandpass filters pump-rejection filters. CAR enhanced 700 adding on-chip MZIs. observe spiral highly depending wavelength detuning pump wavelength. discuss noise sources related degradation our experimental results.
In the same silicon photonic integrated circuit, we compare two types of degenerate photon-pair sources (microring resonators and waveguides) using Hong–Ou–Mandel (HOM) interference experiments. Two nominally identical microring are coupled to waveguides, which form arms a Mach–Zehnder interferometer. This is pumped by lasers at different wavelengths generate, spontaneous four-wave mixing, photon pairs. particular, can be thermally tuned in or out resonance with pump wavelengths, thus...
Production planning is a key part of production management manufacturing enterprises. Since computerization began, modern has been developed starting with Material Requirement Planning (MRP), and today Enterprise Resource (ERP), Advanced Scheduling (APS), Supply Chain Management (SCM) spreading advanced. However, in the shipbuilding field, rather than applying these general-purpose methodologies, most cases, each shipyard its own system. This because applications methods are limited due to...
We evaluate highly fluorinated liquid prepolymers and their UV-cured films for flexible optical waveguide applications. Two prepolymers, 2,3,5,6,2′,3′,5′,6′-octafluoro-4,4′-bis-[2-{2-[1,1-difluoro-2-(2,3,5,6-tetrafluoro-4-vinyl-phenoxy)-ethoxy]-1,1,2,2-tetrafluoro-ethoxy}-2,2-difluoro-ethoxy]-biphenyl (7)...
Shipbuilding competitiveness can be improved by implementing a production planning system that reflects environments and achieve high degree of completion. Unfortunately, even South Korean shipbuilders, which are the world's most competitive, lack relevant research on objectives, comprehensive evaluation method for systemisation process results planning. This study proposes ship analysing tasks executed in major shipyards. In addition, it an framework to assess based integrated process. The...
We demonstrate controlled-NOT (CNOT) operation of a silicon nitride photonic integrated circuit using path-entangled photon pairs from silicon-photonic as logical inputs. The CNOT gate is constructed by combining several silicon-nitride Mach–Zehnder interferometers for linear-optical quantum gate. package each the two circuits with electrical wire bonding and optical fiber stable measurement. logical-basis fidelity measured better than 81% fully packaged circuits.
We fabricate a 20 um wide grating coupler for single-mode thermally-expanded-core (TEC) fiber, in order to enhance positional tolerance alignment. The minimal coupling loss is measured at 5 dB per facet and the optical 3 bandwidth 40 nm. alignment +-7.5 microm horizontal direction +290 vertical direction. 1 +-4.2 +125 enhanced twice four times direction, compared with of standard fiber 10 which also fabricated this experiment.
We present a possibility of intensifying temperature sensitivity silicon Mach-Zehnder interferometer (MZI) by using highly negative thermo-optic property titania (TiO2). Temperature an asymmetric MZI with cladding is experimentally measured from +18pm/C to -340 pm/C depending on design parameters MZI.
An electronic integrated circuit (EIC) and a silicon photonic (PIC) are 3D-integrated. The EIC using the complementary metal-oxide-semiconductor (CMOS) part of STMicroelectronics' BCD8sp 0.16 μm technology controls all 768 switches in PIC individually monitors them with 84 transimpedance amplifiers. A scalable analog-digital approach cell size 100 × <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> for thermal control optical ring...
The emerging ISO/IEC 15504 standard provides a framework and model for software process assessment improvement. There are two requirements reliable assessment: internal reliability external reliability. objective of the study is to provide an empirical case reliability, i.e. interrater agreement in 15504-based assessment. Interrater implies extent which independent assessors agree their ratings attributes. Our dataset was from assessments conducted using standard. results showed...
Very low vertical bending loss is demonstrated in a flexible metal waveguide. The waveguide consists of an 8 nm-thick and 68 mm-long Ag strip embedded free-standing multilayered low-loss polymer film. film composed 10 microm-thick inner cladding with refractive index 1.524, pair 20 outer claddings which both have 1.514, resulting total thickness 50 microm. measured lower than 0.3 dB/180 masculine at wavelength 1310 nm for the radii down to 2 mm.
Polymer-based silver stripe optical waveguides were developed for chip-to-chip interconnections, and their characteristics investigated. The lowest propagation loss of 0.8 dB/cm was achieved with a 14-nm-thick 1.5-mum-wide stripe, at wavelength 1.3 mum . 2.5-Gb/s signals successfully transmitted via 10-cm-long waveguides.