Wavelength-stepped, actively mode-locked fiber laser = 파장이 불연속적으로 변화하는 능동 모드 잠금 광섬유 레이저 연구

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Wavelength-swept lasers are fast becoming a key element of optical coherence tomography (OCT) with high speed, resolution, and sensitivity. Various designs of wavelength-swept lasers have been investigated to improve the performance for OCT applications, especially to increase the sweep speed. For a decade, the fundamental limit of the sweep speed of laser has been solved with novel designs based on km-long optical fiber cavity and a very small cavity tuned by micro-electromechanical systems. But relying on the mechanical tuning for wavelength sweep is a drawback concerning the long-time stability and improving the speed even more. There have also been increasing concerns about the insufficient bandwidth of data acquisition for high-speed OCT with extended depth range. To solve the addressed problems efficiently, wavelength-stepping without movable components is required. In this thesis, we have developed and characterized a wavelength-stepped fiber laser in combination with the simple active mode-locking technique. Individual control and noise characterization of each wavelength step were demonstrated for the first time. This novel design provides possibilities for a high number of wavelength steps, high repetition with shorter cavity length, and narrow optical linewidth, that are advantageous for applications including optical coherence tomography.
Advisors
Kim, Byoung Yoonresearcher김병윤researcher
Description
한국과학기술원 :물리학과,
Publisher
한국과학기술원
Issue Date
2018
Identifier
325007
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 물리학과, 2018.2,[iv, 74 p. :]

Keywords

Wavelegnth swept laser▼aMode-locked laser▼aFiber laser▼aEribum doped fiber; 파장훑음 레이저▼a모드잠금 레이저▼a광섬유 레이저▼a어븀 도핑 광섬유▼a광 간섭 단층촬영

URI
http://hdl.handle.net/10203/264634
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=734290&flag=dissertation
Appears in Collection
PH-Theses_Ph.D.(박사논문)
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