서지주요정보
어븀 첨가 광섬유 증폭기의 동적 이득 등화 알고리즘 = Dynamic gain flattening algorithms for erbium-doped fiber amplifiers
서명 / 저자 어븀 첨가 광섬유 증폭기의 동적 이득 등화 알고리즘 = Dynamic gain flattening algorithms for erbium-doped fiber amplifiers / 박근열.
저자명 박근열 ; Park, Kun-Youl
발행사항 [대전 : 한국과학기술원, 2001].
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등록번호

8011893

소장위치/청구기호

학술문화관(문화관) 보존서고

MEE 01034

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초록정보

The recent exponential growth in data traffic and the Internet places urgent demands on high capacity WDM optical transmission systems. To fulfill these demands, it is very attractive to widen the bandwidth of optical amplifiers. Erbium-doped fiber amplifier(EDFA) is key technology in WDM system and its usable bandwidth was limited by its physical characteristics. In order to solve this problem, it was suggested to use acousto-optic tunable filters(AOTF) as active gain-flattening filters in the mid-stage of EDFA. To flatten the gain, an algorithm to control the spectral characteristic of AOTF and pump power is required. However, the algorithm that has been adopted in gain flattening of EDFA is heuristic and it has many weighting factors which are determined by trials and errors. In this paper, we propose a new algorithm to flatten the gain spectrum of EDFA. This algorithm is based on the well-known numerical method, nonlinear least square, to estimate spectral characteristic of AOTF which modifies the output spectrum of EDFA to flatten the gain. The new algorithm gives better performance with respect to the previous heuristic methods. The maximum gain ripple of the gain flattened EDFA was less than 0.5 dB. In addition, the new algorithm requires three times small iterations for gain flattening. We also suggest some guidelines to design of dynamically gain flatted EDFA with AOTF. The dynamic range of the dynamically gain flattened amplifier is much wider than that of the conventional amplifiers that have the gain flattening filters and a variable optical attenuator.

서지기타정보

서지기타정보
청구기호 {MEE 01034
형태사항 iii, 54 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Kun-Youl Park
지도교수의 한글표기 : 이창희
지도교수의 영문표기 : Chang-Hee Lee
학위논문 학위논문(석사) - 한국과학기술원 : 전기및전자공학전공,
서지주기 참고문헌 : p. 49-52
주제 어븀 첨가 광섬유 증폭기
동적 이득 등화 알고리즘
음향 광학 가변 필터
erbium-doped fiber amplifier
dynamic gain flattening algorithm
acousto-optic tunable filter
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