In this thesis, we investigated passive dynamics of fiber laser with parameters of saturable component in the laser cavity. Based on theoretical guidelines of the passive laser dynamics, multi-functional saturable absorber which can promote different forms of laser output state in the given cavity parameters was fabricated and tested. As a result, we demonstrated four different laser operational states in the same passive fiber ring laser cavity by controlling solely the polarization state in a saturable absorber. The demonstrated laser operational states were continuous wave, mode-locking, Q-switching, and Q-switched mode-locking. The saturable absorber was fabricated by spin-coating a single-walled carbon nanotubes (SWCNT)/polymer composite on a side polished fiber providing enhanced nonlinear interaction with the SWCNT. The wide tuning range of the saturable absorber allows the simple means to generate different forms of laser output from a single laser cavity.
포화흡수체를 포함한 수동형 광섬유 레이저의 동적특성에 대한 이론적 이해를 바탕으로 하나의 광섬유 레이저 공진기내에서 다양한 동작상태를 구현할 수 있는 단일벽 탄소나노튜브 포화흡수체를 제작 및 시연한다. 이를 위해,편광에 의존하는 비선형 광학특성을 향상시킨 소자의 제작방법을 제시하고, 이를 이용해 서로다른 레이저 동작상태를 구현한다. 또한 측정된 소자의 특성으로부터 다양한 동작상태의 원인을 분석한다.
