JPT Opto-electronics is one of the quickly growing global outstanding solutions providers of fiber optics and fiber lasers. The company now focuses on the R&D, production, sales and technology service of fiber optics and fiber lasers. The products are widely used in optical communication, optical sensing, laser machining etc. We visited some facilities Fiber laser based SiliconWafer Stage Tester for Integrated Photonics; Diode-pumped solid-state laser based MicroBarcodes; Diode-pumped solid-state laser based MicroBarcodes; Fiber laser system packaging; Fiber Laser based High-Precision Trimmer.
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PCF continue to yield unexpected optical properties and make possible novel applications. An example is twisted PCF, which creates optical vortices that carry orbital angular momentum and providing an elegant means of circular birefringence and dichroism, most recently in hollow-core PCF. During the seminar, a selection of recent results from work carried out at MPL was presented.
IPS Seminar on MicroNano Fiber Devices and Application in fiber sensing and modelockedfiber laser1/15/2019 Micro/nano fiber devices have attracted increasing research interests due to the low-loss characteristic as silica wave guides, small diameter and large evanescent field in recent years. This talk will first introduce the microfiber Fabry-Perot interferometer (MFPI) for simultaneous measurement of refractive index and temperature, which is fabricated by applying the flame
brushing technique at the center part of FBG. In addition, a microfiber-based saturable absorber (SA) is fabricated by optically depositing the few-layer tungsten disulfide (WS2) nanosheets onto microfiber. Owing to the optic evanescent field interaction with WS2, a passively modelocked fiber laser is developed for the observation of soliton molecules. Furthermore, mode-locked fiber lasers based on different mode-locking mechanisms are studied, which both enriches our understanding of the dynamics of optical solitons and paves potential application IPS Seminar - Novel Fiber-Optic Sensors for Magnetic Field,Temperature and Liquid Level Measurement12/21/2018 Fiber-optic sensors have been widely investigated as a highly promising solution in many industrial applications. This talk introduces miniature fiber-optic sensors for the magnetic field, temperature, and liquid level measurement. The magnetic field sensor is based on a
magnetic fluid (MF)-infiltrated phase-shifted fiber Bragg grating, which has a micrometer-level action length about 10 μm of MF. And the temperature sensor consists of a compact Michelson interferometer with highly Germaniadoped fiber. An appropriately narrow FSR of 18.9 nm is observed through the sensing fiber is as short as 1.0 mm. In addition, anti-resonant reflecting guidance in short length of silica tube is utilized to detect tiny liquid level variation. Its limit of detection is proved to be around 50 μm. These designed sensors are much more compact than normal fiber-based sensors, which is a key feature in point measurement because what we achieve is actually the average effect along the total length of the probe. IPS Workshop on 'Meditation for Releasing Stress, Gaining Insights and Boosting Creativity'11/16/2018 This workshop covers what is meditation and what is it about; how meditation can dramatically shift our state of being, so that to help us manage stress, find inner peace and connect with wisdom; how we can start meditating with zero struggle; Also, this workshop brings us on an inner journey with a guided meditation to seek out an answer for our current query. So come with an intention and an open mind.
Biophotonics is a multidisciplinary field that deals with all aspects of interactions between light and biological materials. The talk first describes what biophotonics is and then gives some basic concepts of light tissue interactions. At last, the technologies used in biophotonics are shown with examples.
This talk first described what biophotonics is and then gave some basic concepts of light-issue interactions. Next was a discussion of the technologies used in biophotonics, which include a wide variety of optical fibers, optical sources, photodetectors and cameras, and miniaturized instruments.
The talk deliberated on efforts related to optical amplifier fibers for shorter and longer wavelengths, focusing on Thulium and Bismuth, codopants such as Aluminum, Barium and Gallium. A sample of recent developments in SOF for optical fiber sensing was also presented.
IPS Industrial Visit: Singapore Centre for 3D Printing (SC3DP) @ NanyangTechnological University5/26/2017 SC3DP is a research centre of NTU. It aspires to be a national centre of excellence, to consolidate cutting edge technology and research in the area of 3D printing. With close to $150m funding secured from NRF, EDB, AStar and MOE NTU and external partners, SC3DP provides a platform that spearheads Singapore’s efforts in 3D Printing. It's really worth visiting!
Speaker: Dr. Aminul I. Talukder
Date: 14 Jul 2016 (Thursday) Time: 2:30pm to 3:30pm Venue: Executive Seminar Room(S2.2-B2-53), School of EEE, NTU, S639798 Abstract The propagation of shaped optical pulses has been investigated in different dispersive media. A transition from the Superluminal to subluminal of the propagation velocity is observed through a resonantly absorbing medium when the propagation distance is changed from a short to long range. The propagation velocity is described within the framework of net group and reshaping delays. The propagation of pulses with incoherent shapes in an absorptionless system is well described by the net group delay; even the medium causes a great deal of deformation in the transmitted pulse. This has been confirmed for other shape of pulses through different types of absorptionless dispersive media such as angularly dispersive one, photonic crystal fiber, etc. However, in the case of phase modulated chirping pulses in a resonant absorber, the propagation velocity is strongly influenced by the reshaping delay. Direct observation of superluminality or fast light has been confirmed from a series of experiments of pulse propagation through a fiber ring resonator within its negative group delay limit. It is observed that the superluminal propagation of pulse peak is an analytic continuation over time of the earlier portion of the input pulse envelope. Biography Dr. Aminul I. Talukder received the B.Sc. degree and M.Sc degree in Physics from Dhaka University, Bangladesh in 1989 and 1990, the Ph.D. degree in Materials Science from Shizuoka University, Japan, in 2001, respectively. From 2003 to 2005, he was a JSPS Fellowship in Shizuoka University, Japan. He was a Commonwealth Fellowship from 2009 to 2010 in ORC, University of Southampton, UK. He was a JSPS Invitation Fellowship from 2012 to 2013 in Shizuoka University, Japan. He is currently a professor in department of Physics in university of Dhaka, Bangladesh. His research interests include generalization of group velocity- relevance to arbitrary and ultrashort pulses light propagation in linear dispersive systems- resonant absorber/amplifier, laser ablation techniques for nano-particles fabrication of metals and their Use in SERS (Surface Enhanced Raman Spectroscopy), laser induced breakdown spectroscopy (LIBS) and Raman spectroscopy for determination of food adulteration, time resolved fluorescence spectroscopy using ultrashort pulses molecular dynamics and pulse compression and shaping technology fiber based chirped pulse amplification system. Jointly organized by COFT-Centre for Optical Fibre Technology OPTIMUS-Centre for OptoElectronics and Biophotonics School of EEE, The Photonics Institute, Nanyang Technological University; CINTRA-CNRS International NTU THALES Research Alliance IEEE Photonics Society Singapore Chapter OSA Singapore Section |
AuthorIEEE IPS Singapore Chapter Archives
October 2019
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