Abstract
We propose and experimentally demonstrate a photonic microwave notch filter with a negative coefficient. The negative coefficient is obtained by using cross gain modulation (XGM) in a reflective semiconductor optical amplifier (RSOA). When the RSOA is operated in saturated region, the signal carried on the pump wavelength is inversely copied to the probe wavelength by the XGM effect, showing a negative coefficient. Time delay between pump signal and probe signal is provided by single mode fiber (SMF) with wavelength dependent time delay. The proposed microwave notch filter shows notch dips of more than 35.1 dB and free spectral range (FSR) of about 380.6 MHz. 논문 14-39C-05-03 The Journal of Korea Information and Communications Society '14-05 Vol.39C No.05 http://dx.doi.org/10.7840/kics.2014.39C.5.418 418 ※ 본 연구는 산업통산자원부 산하 (재)충청지역사업평가원 융합전자기기 선도사업 신호처리융합기기 프로젝트의 지원을 받아 수행된 연구임. ※ 이 논문은 2013년도 정부(교육부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(NRF-2009-0093828). First Author : School of Information and Communications, Gwangju Institute of Science and Technology, wbkwon@gist.ac.kr, 정회원 ° Corresponding Author : School of Information and Communications, Gwangju Institute of Science and Technology, csp@gist.ac.kr, 정회원 * 광주과학기술원 정보통신공학부, cyk@gist.ac.kr. 정회원 ** 목포대학교, srlee@mokpo.ac.kr. 종신회원 논문번호:KICS2014-02-030, Received Feburary 3, 2014; Revised April 17, 2014; Accepted April 17, 2014 논문 / 반사형 반도체 광 증폭기를 이용한 음계수를 가지는 광 마이크로파 노치 필터
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