Browsing by Author "CHEN, YK"

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DEMONSTRATION OF IN-SERVICE SUPERVISORY REPEATERLESS BIDIRECTIONAL WAVELENGTH-DIVISION-MULTIPLEXING TRANSMISSION-SYSTEM
(1995-09-01)
CHEN, YK
;
GUO, WY
;
CHI, S
;
WAY, WI
;
電信研究中心
An in-service supervisory repeaterless bidirectional wavelength-division-multiplexing (WDM) transmission system using optical fiber amplifiers is demonstrated for the first time. The system supervision by an optical time domain reflectometer (OTDR) is achieved without degrading the 2.5 Gb/s service over a bidirectional six-WDM-channel 200-km single-fiber link, Negligible system penalties of dispersion and counter-directional transmission crosstalk are observed.
FAULT-LOCATING AND SUPERVISORY TECHNIQUE FOR MULTISTAGED BRANCHED OPTICAL NETWORKS
(1994-07-01)
CHEN, YK
;
CHI, SE
;
光電工程學系
;
Department of Photonics
A fault-locating and supervisory technique for large multistage branched optical fiber networks is proposed. The requirement of ultra-wide dynamic range of an optical time-domain reflectometer (OTDR) to diagnose the network can be tremendously relaxed. Not only can the failure of optical splitter itself be monitored, but also any faults of the fiber links whether before, after, or between optical splitters can be located. The feasibility of this technique was experimentally demonstrated in a 128-branched network using an erbium-doped fiber-amplifier-enhanced OTDR.
HIGH-SPEED BIDIRECTIONAL 4-CHANNEL OPTICAL FDM-NCFSK TRANSMISSION USING AN ER-3+-DOPED FIBER AMPLIFIER
(1993-02-01)
GUO, WY
;
CHEN, YK
;
光電工程學系
;
Department of Photonics
A four-channel optical FDM-NCFSK bidirectional transmission experiment using an Er3+-doped fiber amplifier at 1.7 Gb/s for 100 km fiber length is demonstrated. Using commercial DFB LDs, a received power of -35 dBm at 10(-9) BER is obtained, and the dispersion degradation over 100 km bidirectional transmission is negligible. With channel spacing of about 30 GHz, the differential power penalty is about 0.1 dB.
HYBRID TRANSMISSIVE OPTICAL STAR COUPLERS WITH GAIN USING FIBER AMPLIFIERS
(1993-02-01)
CHEN, YK
;
CHI, S
;
LIAW, JW
;
光電工程學系
;
電信研究中心
A hybrid transmissive star coupler incorporating fiber amplifiers for WDM/FDM networks is proposed. It is found that the total fiber length and conduit length required for this hybrid star coupler/network can be reduced tremendously as comparing with either the centralized or the distributed cases. Furthermore, this coupler is easier to construct and more cost-effective.
IN-SERVICE SUPERVISORY EDFA-REPEATED WAVELENGTH-DIVISION MULTIPLEXING TRANSMISSION-SYSTEM
(1995-08-01)
CHEN, YK
;
GUO, WY
;
WAY, WI
;
CHI, S
;
光電工程學系
An in-service supervisory wavelength division multiplexing (WDM) transmission system is demonstrated for the first time. Simultaneous fault location and EDFA status-monitoring are achieved without degrading the 2.5 Gb/s service in a five-EDFA, 365-km, four-WDM-channel system.
LOSSLESS WIDE-BAND REFLECTIVE STAR COUPLER USING ERBIUM-DOPED FIBER AMPLIFIERS
(1994-12-01)
ZENG, JY
;
GUO, WY
;
CHEN, YK
;
光電工程學系
;
Department of Photonics
A wide-band 64-port amplified reflective star coupler (ARSC) using eight fiber amplifiers and only four pump laser diodes is demonstrated, The loss of this ARSC can be fully compensated from 1530 nm to 1565 nm due to its double-pass amplification process, The power margin increment of 21.7 dB with the power penalty of 1.3 dB and the cross-channel power penalty of 2 dB are achieved in a 1.7 Gb/s system experiment, This ARSC technology makes the star coupler cost-effective to be used in many larger wavelength division multiple access networks.
MULTIWAVELENGTH LINE-RATE-INDEPENDENT OPTICAL DIGITAL CROSS-CONNECTS BASED ON LOW-GAIN FIBER AMPLIFIERS
(1994-09-01)
CHEN, YK
;
WAY, WI
;
光電工程學系
;
電信研究中心
;
Department of Photonics
We experimentally demonstrated a multiwavelength, line-rate independent optical digital cross-connect system (DCS) by using cascaded low-gain erbium-doped fiber amplifiers as the switching elements in a dilated Benes architecture.
NOVEL SUPERVISORY TECHNIQUE USING WAVELENGTH-DIVISION-MULTIPLEXED OTDR IN EDFA REPEATERED TRANSMISSION-SYSTEMS
(1994-03-01)
LAI, YW
;
CHEN, YK
;
WAY, WI
;
電信工程研究所
;
光電工程學系
A wavelength-division-multiplexed optical-time-domain-reflectometry (OTDR) supervisory technique is experimentally demonstrated in a 200-km transmission system. The technique can simultaneously achieve in-line EDFA performance monitoring and diversity protection, and fault location in optical fibers.
SIMULTANEOUS IN-SERVICE FAULT-LOCATING AND EDFA-MONITORING SUPERVISORY TRANSMISSION IN EDFA-REPEATERED SYSTEMS
(1994-12-08)
CHEN, YK
;
GUO, WY
;
WAY, WI
;
CHI, S
;
光電工程學系
In-service WDM-based supervisory transmission in four/five EDFA-repeater 375km/365km systems is demonstrated. Simultaneous EDFA status-monitoring and fibre fault location are achieved without degrading the 2.5Gbit/s service.
THE EFFECT OF TRANSIENT GAIN COMPRESSION IN A SATURATED EDFA ON OPTICAL-TIME DOMAIN REFLECTOMETRY TESTING
(1994-10-01)
WAY, WI
;
LAI, YW
;
CHEN, YK
;
電信工程研究所
;
電信研究中心
This paper examines optical-time-domain-reflectometry (OTDR) pulse distortion due to transient gain compression in a saturated erbium-doped fiber amplifier (EDFA) and the resultant effect on testing long-haul optical fiber systems.
WDM/FDM STAR COUPLER WITH GAIN USING FIBER AMPLIFIERS
(1993-04-29)
CHEN, YK
;
CHI, S
;
光電工程學系
;
電信研究中心
;
Department of Photonics
An efficient amplified WDM/FDM star coupler is proposed. The size of the coupler can be increased by a factor of m using m fibre amplifiers. Furthermore, the complexity and cost of the proposed scheme are less than those of other configurations.
WIDE-BAND 32X32 STAR COUPLER MODULE WITH GAIN
(1993-09-30)
GUO, WY
;
CHEN, YK
;
ZENG, JY
;
CHI, S
;
光電工程學系
A wideband 32 x 32 star coupler module using two fibre amplifiers is presented. Not only can the loss of this module be fully compensated for but also it has better loss uniformity. The power margin increment of 18dB is achieved with this module in a 1.7 Gbit/s system experiment.