Browsing by Author "Luo, Cheng-Jhih"

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10 GHz Bound Soliton Mode-locking in an Environmentally Stable FM Mode-locked Er-doped Fiber Soliton Laser
(2014)
Luo, Cheng-Jhih
;
Wang, Sheng-Min
;
Lai, Yinchieh
;
光電工程學系
;
Department of Photonics
We experimentally demonstrate an environmentally stable 10 GHz FM mode-locked Er-doped fiber soliton laser that can produce stable bound solitons even when there is no equivalent fast saturable absorption mechanism inside the cavity.
Bound Soliton Fiber Laser Mode-Locking Without Saturable Absorption Effect
(2016-08-01)
Luo, Cheng-Jhih
;
Wang, Sheng-Min
;
Lai, Yinchieh
;
光電工程學系
;
光電工程研究所
Stable bound soliton laser mode-locking is experimentally demonstrated in an environmentally stable hybrid mode-locked Er-doped fiber laser without incorporating (equivalent) nonlinear saturable absorption effects. The laser has a sigma-type cavity and exhibits a higher threshold for single to bound soliton mode-locking state transition. A nonlinear eigenstate analysis based on the master equation model and the concept of steady-state lasing gain is developed to more physically explain the observed mode-locking state transition phenomena.
Characteristics of a 40 GHz asynchronous harmonic mode-locked Er-doped fiber laser
(2017-01-01)
Wen, Chih-Chieh
;
Luo, Cheng-Jhih
;
Wang, Sheng-Min
;
Lai, Yinchieh
;
光電工程學系
A 40 GHz asynchronous harmonic mode-locked Er-doped fiber laser is demonstrated for the first time. Long-term stability is achieved through low-frequency electronic feedback and the impact of modulation depth on allowable detuning range is investigated.
Performance study of a 10 GHz dispersion-tuned wavelength-swept all-PM figure-8 hybrid mode-locked Er-doped fiber laser
(2017-01-01)
Luo, Cheng-Jhih
;
Hung, Chih-Hao
;
Lai, Yinchieh
;
光電工程學系
;
Department of Photonics
Based on an all-PM figure-8 fiber loop cavity configuration with in-loop phase modulation, we demonstrate a 10 GHz dispersion-tuned wavelength-swept hybrid mode-locked Er-doped fiber laser with reasonably fast wavelength sweeping rate and excellent environmental stability.
Relative Intensity Noise of Hybrid Mode-Locked Bound Soliton Fiber Laser: Theory and Experiment
(2018-09-01)
Luo, Cheng-Jhih
;
Lai, Yinchieh
;
光電學院
;
光電工程學系
;
College of Photonics
Relative intensity noises (RIN) of mode-locked lasers are properties which are crucial for applications. In the literature, there have been plenty of theoretical/experimental studies on the RIN noises of passive/active single-pulse mode-locked lasers. Since some mode-locked lasers can also be operated under the bound-pulse mode-locking state, it is thus very interesting to further examine the RIN properties under bound-pulse mode-locking, and to verify if there are possibilities for RIN noise reduction as predicted by some previous theoretical works. The conventional analytical formula based on the soliton perturbation theory can no longer be applied due to the pulse shape complexity for the bound-pulse mode-locking cases. New theoretical tools for modelling general mode-locked lasers are eagerly awaited. In the present work, the RIN noises of an environmentally stable 10 GHz hybrid mode-locked Er-doped fiber laser capable of bound-soliton generation are experimentally investigated, and a novel theoretical method based on the linearized backpropagation approach is theoretically developed for calculating the RIN noise spectra of general mode-locked lasers. Both the theoretical and experimental results demonstrate that the RIN noise of the bound-soliton state can be lower than that of the single-soliton state by following the laser power scaling tendency.
RIN noise reduction effect of a 10 GHz hybrid bound soliton mode-locked fiber laser
(2016-01-01)
Luo, Cheng-Jhih
;
Lai, Yinchieh
;
光電工程學系
;
Department of Photonics
By investigating a 10 GHz environmentally stable hybrid mode-locked Er-doped fiber soliton laser with a sigma-type laser cavity, we experimentally and theoretically demonstrate that the relative intensity noise (RIN) of bound soliton mode-locking can be slightly smaller than that of single soliton mode-locking.