Korean Journal of Optics and Photonics (한국광학회지)

Optical Society of Korea (한국광학회)
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Characterization of Wavelength Swept Laser with a Scanning Frequency at 1300 nm

1300 nm 대역 파장 훑음 레이저의 훑음 주파수에 따른 출력 특성

  • 이병창 (충남대학교 자연과학대학 물리학과) ;
  • 오민현 (충남대학교 자연과학대학 물리학과) ;
  • 전민용 (충남대학교 자연과학대학 물리학과)
  • Published : 2009.06.25
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Abstract

We demonstrate a ring type wavelength swept laser incorporating a fiber Fabry-Perot tunable filter in a laser cavity using 1300 nm semiconductor optical amplifier as a gain medium. The output characteristics of the wavelength swept laser according to the applied scanning frequencies are analyzed in the temporal and spectral domain. The output of the wavelength swept laser decreases dramatically as the scanning frequency increases. And there is a significant peak power imbalance between the forward scan and the backward scan as the scanning frequency increases. Its use in practical applications might be limited.

광섬유 일체형으로 된 파브리-페롯 가변 필터를 레이저 공진기에 삽입하고, 1300 nm 대역의 반도체 광 증폭기를 이득매질로 이용하여 링 공진기 형태의 파장 훑음 레이저를 구현하였다. 파장 훑음 레이저의 훑음 주파수에 따른 레이저 출력 특성을 시간영역과 파장영역에서 분석하였다. 파장 훑음 주파수가 증가하면 레이저 출력이 급격하게 줄어들고, 훑음 반치폭도 감소한다. 또한 훑음 주파수 증가에 따라 전방 훑음과 후방 훑음의 광 세기가 비대칭으로 나타나며, 실제 응용 시스템에 적용할 수 있는 제한요소로 작용한다.

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