서지주요정보
대용량 메트로 파장분할 다중방식 광통신망 = High Capacity metro-WDM networks
서명 / 저자 대용량 메트로 파장분할 다중방식 광통신망 = High Capacity metro-WDM networks / 박성범.
저자명 박성범 ; Park, Sung-Bum
발행사항 [대전 : 한국과학기술원, 2003].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8014414

소장위치/청구기호

학술문화관(문화관) 보존서고

DEE 03022

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

리뷰정보

초록정보

Optical long-haul communication technology has kept up with the explosive growth of bandwidth by employing the wavelength-division-multiplexing (WDM) technology. The WDM technology will also dramatically improve the capabilities of metropolitan access networks. Since the metropolitan access market is extremely cost-sensitive, the metro-WDM networks must be economical. In this dissertation, we propose and demonstrate low cost modulation method and two cost-effective bidirectional WDM self-healing ring networks applied to metropolitan access networks. Firstly, a spectral filtering method in directly modulated metro-WDM transmission system is proposed. The spectral filter reduces the chirp-induced dispersion penalty and the extinction ratio penalty. There exists optimum filter bandwidth to maximize spectral filtering effect. For wide band filters, we can enhance the spectral filtering effect by detuning the filter transmission wavelength from the transmission wavelength. The maximum improvement of bit error rate (BER) power penalty after 240 km is 3 dB when the bandwidth of spectral filter is 8 GHz. The pre-filtering method suppresses nonlinear effects and gives better performance improvement than the post-filtering. We also observed the improvement of power penalty in bi-directional ring networks. Secondly, we demonstrate a bidirectional WDM self-healing ring network connecting a central office and N remote nodes with the add fiber and drop fiber. Each remote node consists of an add multiplexer connected to the add fiber and a drop demultiplexer connected to the drop fiber. In this way, we can relax the device requirement for the relative intensity noise (RIN) generated in the bidirectional ring network. In the normal state, we can double the transmission capacity. The proposed ring provides self-healing function within 10 ms. The scalability of the proposed ring network is limited by power budget and RIN. The 2.5 Gb/s-based ring network could accommodate 8 nodes without optical amplifiers when the node spacing is 15 km. One bidirectional optical amplifier of 19.6-dB gain could improve the network size by 4 nodes. Finally, another bidirectional WDM add/drop self-healing ring network is demonstrated. The proposed ring network connects a central office and N remote nodes with a single strand of fiber, which maximizes the fiber efficiency. Each remote node consists of a bidirectional add/drop multiplexer. The transmission capacity can be doubled in the operating state. In this network, self-healing can be achieved within 8 ms. Considering the RIN and the receiver sensitivity, the ring network based on 2.5 Gb/s signals could accommodate 6 nodes without optical amplifiers when the node spacing is 15 km. One bidirectional optical amplifier of 11.8-dB gain could increase the number of nodes by 2.

서지기타정보

서지기타정보
청구기호 {DEE 03022
형태사항 v, 122 p. : 삽도 ; 26 cm
언어 한국어
일반주기 부록 : 파장분할 다중방식 광전송 시스템의 고속화 방안
저자명의 영문표기 : Sung-Bum Park
지도교수의 한글표기 : 이창희
지도교수의 영문표기 : Chang-Hee Lee
수록잡지명 : "Bidirectional WDM self-healing ring network composed of add fibre and drop fibre". Electronics letters, v.37 no.7, pp. 446-448 (2001)
수록잡지명 : "Enhancement of system performance in directly modulated metro-WDM systems by a spectral filtering method". Electronics letters, v.38 no.9, pp. 418-419 (2002)
학위논문 학위논문(박사) - 한국과학기술원 : 전기및전자공학전공,
서지주기 참고문헌 : p. 94-98
주제 광통신
파장분할 다중방식
메트로/가입자망
환형망
애드/드롭 다중화기
optical fiber communication
wavelength division multiplexing
metro/access network
ring network
add/drop multiplexer
QR CODE qr code