Browsing by Author "WU, J"

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A PRECISION EXPERIMENT ON ELECTRONS, PHOTONS AND MUONS AT LHC
(1993-02-01)
AZIZ, T
;
BOCK, R
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BRAUNSCHWEIG, W
;
GEULIG, E
;
HILGERS, K
We describe the upgrade of the L3 detector for running at LHC. The principle goals are the precise measurement of electrons, photons and muons.
COHERENT OPTICAL RING USING COMMON LOCAL OSCILLATOR
(1990-07-05)
KAO, MS
;
WU, J
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電信工程研究所
;
Institute of Communications Engineering
COHERENT SUBCARRIER MULTIPLEXED STAR DISTRIBUTION-SYSTEM USING SINGLE LOCAL OSCILLATOR
(1990-09-27)
KAO, MS
;
WU, J
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交大名義發表
;
National Chiao Tung University
INVARIANT PATTERN-RECOGNITION USING HIGHER-ORDER NEURAL NETWORKS
(1993)
WU, J
;
CHANG, JY
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電控工程研究所
;
Institute of Electrical and Control Engineering
PERFORMANCE ANALYSIS OF WAVELENGTH DIVISION-MULTIPLEXING AND SUBCARRIER-MULTIPLEXING (WDM-SCM) TRANSMISSION USING FIBER BRILLOUIN AMPLIFICATION
(1992-08-01)
LEE, YH
;
WU, J
;
KAO, MS
;
TSAO, HW
;
電信工程研究所
A subcarrier multiplexing based optical wavelength division multiplexing system with fibre Brillouin amplification (FBA) is analysed. In the optical domain, a pump laser is tuned to amplify the corresponding optical carrier by FBA for the desired group of SCM signals. In the electrical domain, a microwave tuner is used to select the desired channel in the selected SCM group. This system has the benefits of eliminating the need for polarisation control, the ability to cancel phase noise due to the 'squaring' photodetection process of the selected optical carrier together with its SCM channels, and enhancement of optical receiver sensitivity by amplification of the carrier. Comparisons with other systems are also presented.
PERFORMANCE EVALUATION OF COHERENT SUBCARRIER MULTIPLEXED OPTICAL-DISTRIBUTION SYSTEMS WITH COMMON LOCAL OSCILLATORS
(1991-08-01)
KAO, MS
;
WU, J
;
電信工程研究所
;
Institute of Communications Engineering
Coherent subcarrier multiplexed local distribution systems using a common local oscillator (LO) in which the LO is provided by a distribution centre instead of locally generated at the subscriber premise are described. Both single and multiple optical carrier systems are considered. Because of the low path loss in a local optical network, a common LO system is possible with a LO shared by many subscribers, and indeed provides many advantages. First, a simplified receiver is achievable which eliminates a tunable LO, an automatic frequency control (AFC) circuit, a polarisation controller, and an optical coupler. Secondly, the system cost is decreased due to the reduction of components. Thirdly, laser phase noise and intermediate frequency (IF) drift are expected to be minimised. Fourthly, because no active optical components are placed at the subscriber premises, the system reliability is increased. Fifthly, the common LO system can be expanded with optical amplifiers without increasing the number of LO and simultaneous amplification of the message, and LO signals are achievable. By sharing high power, highly frequency stabilised, and very narrow linewidth LO lasers provided by the centre, it is expected that a simple and reliable coherent optical distributing network can be constructed by using common LO.