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| Welcome to L.-S. Yan's Homepage |
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| 12/2006-Present Chief Scientist, Manager of Engineering,<05/2005-2006 Senior Scientist, Manager of Engineering, 05/2001-05/2005: Part time senior photonic Engineer General Photonics Corp., Chino, California * Dynamic polarization control, emulation and compensation of PMD, polarization monitoring and measurement * Optical delay generation and measurement * Instrumentation of polarization, timing and spectrum * System integration of novel photonic devices (polarization, timing and spectrum) 09/1999-04/2005 Research Assistant, Optical Communications Laboratory, Dept. of Electrical Engineering - Systems, Univ. of Southern California * Investigation of degrading effects in long-haul WDM transmission systems using a fiber recirculating loop testbed (transmission distance up to several thousand kilometers) * Optimization of system performance using different data formats (NRZ/RZ/CRZ/CSRZ/DPSK), dispersion management, mitigation of nonlinearities * Electronic/Optical compensation and mitigation of system impairments, such as chromatic dispersion, PMD and PDL * Nonlinear signal processing�� Novel characterization of optical/electro-optic devices (chirp, half-wave voltage, etc.) * Performance monitoring (10- and 40-Gb/s), such as CD, PMD, PDL, OSNR, etc. * Advanced emulation of polarization effects, especially demonstration of the loop-synchronized polarization control technique that can accurately simulate straight-line systems using fiber loop testbed in the presence of polarization effects * Direct modulation vs. external modulation techniques * Optical networking functions�� Applications of novel photonic devices or modules * Silicon photonics and nano-photonics * Leading role in projects supported by DARPA, DOD, NSF, etc. * Collaboration with Cisco, Intel, Vitesse, Lucent, GP, Northwestern, UMBC, Waterloo, etc. 08/1999-05/2001 Teaching Assistant, Dept. of Electrical Engineering, University of Southern California 07/1994-08/1999 Research Engineer North China Research Institute of Electro-optics * High power solid state lasers (including average and peak power, rod and slab medium) with the average power more than 1000 W (a single slab) and peak power more than 300 MW (60 Hz, 7 ns) * Product design of Q-switched Nd:YAG laser sources for the application of medical surgery, industrial material processing, etc. * Ultra-short pulse lasers as products designed by active and passive mode locked technology, used for high-energy accelerators and laser ranging system of satellites * LD pumped solid state lasers as seeding injection sources for MOPA system * Phase conjugation and power combination of high-power optical beams |
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