Engineer Assistant

Jin Hong Lim

*** ********** **. ******, ** ***** Tel: 704-***-****(H), 484-***-****(Cell) *******@*****.***

SUMMARY:

Optical engineer specializing in designing and testing optical system/devices. Developed and designed optical sub-systems including components for new and improved-products, creating cost reduction. Expertise includes:

Optical components & system design • Fiber optics, lasers and nonlinear optics Computer simulation and optical testing • Research and products development

WORK EXPERIENCE:

3D Systems Corporation, Rock Hill, SC 2006 – 2012

Senior Optical EngineerDesigned, assembled and tested scanning optical system & devices for rapid prototyping (RP) products: SLA (Stereolithography Apparatus) with UV lasers and selective laser sintering (SLS) with IR lasers -> released a series of RP products.Developed 3D printers-optical curing system for products using UV LEDs and tested optical properties & mechanical properties of cured photopolymers -> released its products.Modified curing & scanning systems in 3D printers & SLA for cost reduction -> brought production in-house which reduced product cost by >30%.Researched light sources including UV lasers, UV LEDs, UV laser diodes, UV lamps, and coupling LDs with multimode fibers.Familiar with optical design software - Zemax and SolidWorks; designed scanning & curing systems along with components of lenses, scan mirrors, and other arrayed optics.

Center for Optical Technologies, Lehigh University, Bethlehem, PA 2004 - 2006

Research Scientist

Simulation/ design of micro-structured optical fibers using Rsoft; Characterization of optical properties of photonic crystal fibers with nonlinear materials; Ti:Sapphire Ultrafast system, OPG with Nd:YAG lasers.

Ultra Fast Optical Systems/ Kirana Networks, Princeton/ Red Bank, NJ

Optical Engineer 2001 – 2003

Designed and tested components/ system for Optical Networks Built/ characterized wavelength converters (2.5 and 10 Gb/s, based on Terahertz Optical Asymmetric Demultiplexer(TOAD), all optical switching), trouble shooting Prepared demo models for conferences (OFC and Supercomm) and tested prototype modelsTested and analyzed optical powers, Noise Figure(NF) and gain tilt in Notch Transmissive Reflexive(NTR) system – Reconfigurable add/ drop multiplexer.Designed/ characterized Erbium Doped Fiber Amplifiers(EDFA); Characterized Optical Channel Performance Monitors(OCPM), Variable Optical Attenuators(VOA)

Lucent Technologies /Agere Systems, Breinigsville, PA

Optical Engineer / Member of Technical Staff 2000 – 2001

Designed optical fiber amplifiers: EDFA customized new product based on customer specifications

Analyzed passive fiber-optic components Simulated EDFAs by OASiX and Extend commercial softwares Address technical issues to meet customer requirementsPerformed model test and analyzed the test resultsWrote documentation of design work/ procedures/ results for productionTransferred from designing to manufacturing including: training and technical resource

University of Michigan, Ann Arbor, MI

Electrical Engineering & Computer Science, Postdoctoral Research Fellow 1999 – 2000

Researched fiber-optic amplifier and nonlinear optics to find new phenomena in fibers. To produce new types of amplifiers for Dense Wavelength Division Multiplexer (DWDM) optical networking.

Performed theoretical and experimental research: Fiber-optic parametric amplifier (FOPA) based

on four-wave mixing and modulation instability.

Result: Proved new phenomena utilizing theoretical and experimental results.

CREOL-School of Optics, University of Central Florida, Orlando, FL

Research Assistant 1994-1999

Performed theoretical and experimental research: Optical limiting/ Nonlinear optics to find new optical properties and new materials for optical limiters

Characterized organic & inorganic optical materials(organics, semiconductors, nano-clusters) Performed experiments on nonlinear optical absorption & refraction of optical materials

using Nd:YAG lasers and pico-second Optical Parametric Oscillator(OPO)Conducted experiments on nonlinear imaging due to thermal effects & high power lasersBuilt pump-probe setup for nonlinear time dynamics measurements (psec) of optical materials.Numerically analyzed /simulated nonlinear light interactions in organic materials using Fortran Maintained nano-and pico-seconds Nd:YAG Lasers; Pico-seconds optical parametric oscillators Performed Pump-Probe and Z-scan experiments in the research lab using psec & nsec Nd:YAG lasers and OPO and simulation on beam propagation inside optical materialsTrained and assisted 5 graduate students performing lab work

Result: Found new optical materials which improved optical limiters. Discovered the material new

nonlinear mechanisms created stronger absorption providing better limiters.

University of Utah, Salt Lake City, UT

Teaching Assistant, Physics 1992 – 1994Conducted experiments on photo-induced absorption measurements on PPV polymeric

materials using CW Ar ion lasers Helped undergraduate students performing physics & optics lab work

GoldStar Company (LG Electronics), Seoul, Korea

Research Engineer, Central Research Institute 1988 – 1991

Designed lens systems (F-Theta lens, aspherical lens) and assembled/ tested Laser Scanning Units for laser beam printersPerformed simulation of LSUs using Genii-pc Lens Design software and C languageCompound lens design, ray tracing: Transferred from development to production

Yonsei University, Seoul, Korea

Research/Teaching Assistant, Physics 1984 – 1988Characterized CO2 laser system and built Q-switching devices for CO2 lasers.Optics and physics lab teachingMilitary service (Korean Army)

EDUCATION: Ph.D. Optical Physics, CREOL-School of Optics, University of Central Florida, 1998M.S. Physics, University of Utah, Salt Lake City, Utah, 1994B.S. Physics, Yonsei University, Seoul, Korea, 1983

TECHNICAL SKILLS:

Computer languages- • Zemax/ZPL, • Matlab, • Fortran, • C/Java

Operating System- • XP/Win7, • Linux/ Unix, • DOS

Software- • Zemax, • R-Soft, • OASiX, • Genii-PC, • SolidWorks, • MS office

PUBLICATIONS/ ASSOCIATIONS

11 journal publications; 16 conference publications;

1 US patent and 2 patents submitted(US & International)

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