A5053656073- Advanced Fiber Optic Sensors
- 3D IC and TSV technologies
- Photonic and Optical Devices
- Electronic Packaging and Soldering Technologies
- Photonic Crystal and Fiber Optics
- Advanced Fiber Laser Technologies
- Parallel Computing and Optimization Techniques
- Interconnection Networks and Systems
- Electromagnetic Compatibility and Noise Suppression
- Engineering Applied Research
- Additive Manufacturing and 3D Printing Technologies
- Titanium Alloys Microstructure and Properties
- Embedded Systems Design Techniques
- Integrated Circuits and Semiconductor Failure Analysis
- Opportunistic and Delay-Tolerant Networks
- Building Energy and Comfort Optimization
- Copper Interconnects and Reliability
- Mobile Ad Hoc Networks
- Advanced Data Storage Technologies
- Industrial Automation and Control Systems
- Microwave and Dielectric Measurement Techniques
- Nanofabrication and Lithography Techniques
- Smart Grid Energy Management
- Advanced Queuing Theory Analysis
- Material Properties and Processing
Beijing University of Posts and Telecommunications
2024
Nanya Technology (Taiwan)
2020-2023
Shenzhen University
2013-2023
Qinghai University
2023
Micron Corporation (United States)
2021
Army Medical University
2020
Southwest Hospital
2020
National Yang Ming Chiao Tung University
2006-2019
Roche (Switzerland)
2018
National Sun Yat-sen University
1990-2014
Abstract Micromanipulation and biological, material science, medical applications often require to control or measure the forces asserted on small objects. Here, we demonstrate for first time microprinting of a novel fiber-tip-polymer clamped-beam probe micro-force sensor examination biological samples. The proposed consists two bases, clamped beam, force-sensing probe, which were developed using femtosecond-laser-induced two-photon polymerization (TPP) technique. Based finite element method...
A Mach-Zehnder interferometer based on a twin-core fiber was proposed and experimentally demonstrated for gas pressure measurements. The in-line fabricated by splicing short section of between two single mode fibers. micro-channel created to form an arm use femtosecond laser drill through one core the fiber. other remained as reference arm. Such exhibited high sensitivity -9.6 nm/MPa low temperature cross-sensitivity 4.4 KPa/°C. Moreover, ultra-compact device size all-fiber configuration...
Abstract We demonstrated a unique rectangular air bubble by means of splicing two sections standard single mode fibers together and tapering the joint. Such an can be used to develop promising high-sensitivity strain sensor based on Fabry-Perot interference. The sensitivity with cavity length about 61 μm wall thickness 1 was measured up 43.0 pm/με is highest among in-fiber FPI-based sensors cavities reported so far. Moreover, our has very low temperature 2.0 pm/°C. Thus, temperature-induced...
We demonstrated a two-dimensional vector-bending sensor by use of fiber Bragg gratings (FBGs) inscribed in homogeneous seven-core fiber. Seven FBGs were simultaneously each all seven cores using modified Talbot interferometer and lens scanning method. The vector bending response six outer-core was investigated at 360° directions with step size 15°. sensitivities the display perfect '8'-shaped patterns polar-coordinate system. That is, they exhibit strong bending-direction dependence maximum...
We demonstrated femtosecond laser inscription of fiber Bragg gratings (FBGs) in a twin-core few-mode (TC-FMF) for directional bend sensing. An FBG was selectively inscribed one core the TC-FMF by using an 800 nm through phase mask. Three resonance peaks at wavelengths 1549.05, 1547.65, and 1546.08 were observed reflection spectrum TC-FM FBG, generated LP <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">01</sub> mode resonance, -LP...
We proposed and experimentally demonstrated a twin-core fiber (TCF)-based Mach-Zehnder interferometer (MZI) to develop an ultrasensitive refractive index (RI) sensor. This MZI was constructed by splicing short section of TCF between two sections single mode fibers. A microchannel drilled through one core the means femtosecond laser micromachining create arm interferometer, other worked as second arm. Such exhibits ultrahigh RI sensitivity -10981 nm/RIU low temperature cross-sensitivity...
We demonstrated a high-sensitivity strain sensor based on an inflated long period fiber grating (I-LPFG). The I-LPFG was inscribed, for the first time to best of our knowledge, by use pressure-assisted CO(2) laser beam scanning technique inflate periodically air holes photonic crystal fiber. Such periodic inflations enhanced sensitivity LPFG-based -5.62 pm/με. After high temperature annealing, achieved good repeatability and stability response with 11.92 pm/°C.
We propose and demonstrate the fabrication of single-crystal sapphire fiber Bragg gratings (SFBGs) using a femtosecond laser line-by-line scanning technique. This approach provides robust method for producing SFBGs at various wavelengths with an acceptable reflectivity. The spectrum characteristics diameters, track lengths, grating pitch quantities were investigated. An SFBG reflectivity 6.3% was obtained via optimization parameters. Additionally, serial array consisting five different...
We demonstrate an ultrahigh-sensitivity gas pressure sensor based on the Fabry-Perot interferometer employing a fiber-tip diaphragm-sealed cavity. The cavity is comprised of silica capillary and ultrathin diaphragm with thickness 170 nm, represents thinnest fabricated thus far by electrical arc discharge technique. resulting interferometer-based demonstrates sensitivity about 12.22 nm/kPa, which more than two orders magnitude greater that similarly configured air bubble sensor. Moreover, our...
Abstract Optical fibers are typically used in telecommunications services for data transmission, where the use of fiber tags is essential to distinguish between different transmission or channels and thus ensure working functionality communication system. Traditional physical entity marking methods labeling bulky, easily confused, and, most importantly, label information can be accessed by all potential users. This work proposes an encrypted optical tag based on encoded Bragg grating (FBG)...
We demonstrate a method for the preparation of negative-index fibre Bragg gratings (FBGs) using 800 nm femtosecond laser overexposure and thermal regeneration. A positive-index type I-IR FBG was first inscribed in H2-free single-mode directed through phase mask, then highly polarization dependant phase-shifted (P-PSFBG) fabricated from by to laser. Subsequently, P-PSFBG thermally annealed at °C 12 hours. Grating regeneration observed during annealing, finally obtained with high reflectivity...
A new fiber interface Mach-Zehnder interferometer has been fabricated, to the best of our knowledge, in coreless by femtosecond laser-inscription for temperature-insensitive refractive index measurement. straight waveguide was inscribed along central axis as reference arm, and other curved (interface waveguide) then bending toward cladding obtain a strong evanescent field sensitive ambient index. This exhibits high (RI) sensitivity ∼3000 nm/RIU at an RI value 1.432. Moreover, with...
Owing to the limitation of optical fiber materials and conventional fabrication methods, development devices has encountered a bottleneck. Recently, two-photon polymerization technology are attracting increasing research interest due its superiorities high precision, flexibility diversity polymer materials. The integrated micro-/nanostructures realized by have become hotspot great application expansion device. In this paper, we review progress in field micro-/nanostructure induced last ten...
Fiber Bragg gratings (FBGs) inscribed by using femtosecond laser point-by-point (PbP) technology typically have high birefringence due to the elliptical cross-sectional pattern of refractive index modulations (RIMs) created in fiber core. Additionally, a highly reflective type II PbP FBG, which has large coupling coefficient, also exhibits insertion loss limited RIM area induced single pulse. Here we demonstrate slit beam shaping method for inscription high-quality FBGs, featuring...
The design, materials, process, fabrication, and reliability of a heterogeneous integration four chips by fan-out panel-level packaging (FOPLP) method are investigated in this paper. Emphasis is placed on the application special assembly process called uni-substrate-integrated package for fabricating redistribution layers (RDLs) FOPLP. Ajinomoto build-up film used as dielectric RDLs built up semiadditive process. electroless Cu to make seed layer, laser direct imaging opening photoresist,...
In this article, the fan-out chip-last panel-level packaging for heterogeneous integration is investigated. Emphasis placed on design, materials, process, fabrication, and simulation of thermomechanical reliability a one large chip (10 mm × 10 mm) two small chips (7 5 by method with redistribution-layer (RDL)-first substrate fabricated 515 510 panel. Reliability assessment includes thermal cycling three-chip package printed circuit board (PCB) assembly that performed nonlinear temperature-...
We demonstrate a simple, robust, and highly sensitive temperature sensor based on the resonant excitation of whispering gallery modes in coated single-mode fiber (SMF) loop that was created by means bending standard SMF into with radius 5 mm. Clear interference fringes were observed transmission spectrum coated-SMF loop. The wavelength exhibits linear response at range from -60° to 10 °C, quadratic 10° 140 °C. Moreover, an ultrahigh sensitivity up -5.22 nm/°C 120 (i.e., -4.01 80 °C) is two...
We demonstrate a high-sensitivity gas pressure sensor by use of an in-fiber Fabry-Pérot interferometer (FPI) based on hollow-core photonic bandgap fiber (HC-PBF) with side-opened channel. The FPI was constructed splicing thin piece HC-PBF between two stander single-mode fibers. Then, channel drilled through the hollow core femtosecond laser. Such greatly enhanced sensitivity up to 4.24 nm/MPa, which is orders magnitude higher than that enclosed cavity. In addition, effects cavity length...
A gas pressure sensor, based on a phase-shifted fiber Bragg grating (PS-FBG) modulated by hollow cavity, is proposed and demonstrated in this Letter. The device was fabricated fusing hollow-core (HCF) between two single-mode fibers (SMFs) exhibiting FBGs that were inscribed using line-by-line femtosecond (fs) laser etching. pair of micro-channels drilled orthogonally into the HCF an fs to allow argon get out freely. Such sensor exposes high spectrum finesse, e.g., <mml:math...
We demonstrate an ultrasensitive temperature sensor based on a unique fiber Fabry-Pérot interferometer (FPI) that was created by means of splicing mercury-filled silica tube with single-mode fiber. The air cavity the FPI formed surface mercury column and endface Moreover, mercury-based exhibits ultrahigh temperature-sensitivity up to -41.9 nm/°C, which is about one order magnitude higher than ordinary FPI-based fiber-tip sensors reported so far. Hence, such could be used for highly sensitive...
We reported a gas pressure sensor based on CO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> -laser-induced long-period fiber grating (LPFG) in an air-core photonic bandgap (PBF). The LPFG was inscribed PBF by the use of improved laser system with ultraprecision 2-D scanning technique, which induced periodic collapses air holes along axis PBF. Such could be used to develop promising sensitivity -137 pm/MPa. Moreover, simplified model...
In this study, a high-density organic hybrid substrate for heterogeneous integration is investigated. Emphasis placed on the design, materials, process, fabrication, characterization, and reliability of supporting three chips. The consists fine metal linewidth spacing redistribution-layer (RDL)-substrate, an interconnect-layer substrate, interconnect (HDI) substrate. chips characterized by continuity test assessed reflow drop test. A nonlinear finite element analysis performed to show state...
A type of encoded FBG array for use as an optical fiber tag is inscribed using a femtosecond laser line-by-line technique. Each included two labels and several codes formed by grating fragments with predetermined length. Encoded information was characterized measuring the backscattered signal. Local spectra from internal were then used to enlarge encoding capacity or encrypt FBG. The insertion loss device low <; 0.1 dB.
Abstract In this investigation, the chip-last, redistribution-layer (RDL)–first, fan-out panel-level packaging (FOPLP) for heterogeneous integration is studied. Emphasis placed on materials, process, fabrication, and reliability of a one large chip (10 × 10 mm2) two small chips (7 5 by an FOPLP method 20 20-mm2 RDL-first substrate fabricated 515 510 mm2 temporary glass panel. Reliability test such as drop package printed circuit board (PCB) performed, results including failure analysis are...
Low-temperature Cu–Cu bonding utilizing pillar and concave on silicon substrate with without polymer layer is successfully implemented at 200 °C under atmospheric pressure. Finite-element method (FEM) simulations stress deformation generated during process are also presented in order to discuss their influence result of several diameters sidewall angles originating from the manufacturing process. The alteration parameters FEM would be investigated enhance outcome. include diameter pillar,...