Browsing by Author "Yu, H. H."

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Spontaneous subpicosecond pulse formation with pulse repetition rate of 80 GHz in a diode-pumped Nd:SrGdGa3O7 disordered crystal laser
(2012-02-15)
Chen, Y. F.
;
Liang, H. C.
;
Tung, J. C.
;
Su, K. W.
;
Zhang, Y. Y.
We explore the operation of spontaneous mode locking in a diode-pumped Nd:SrGdGa3O7 disordered crystal laser. The first- and second-order autocorrelations are simultaneously performed to evaluate the temporal characteristics. An 80 GHz pulse train with a pulse duration as short as 616 fs is observed. The maximum output power is 415 mW at a pump power of 6.1 W. (C) 2012 Optical Society of America
Theoretical and experimental studies for high-repetition-rate disordered crystal lasers with harmonic self-mode locking
(2016-02-22)
Sung, C. L.
;
Lee, C. Y.
;
Cho, H. H.
;
Huang, Y. J.
;
Chen, Y. F.
A harmonically self-mode-locked Nd:Sr3Y2(BO3)(4) disordered crystal laser with subpicosecond pulse duration is demonstrated. We exploit the damped harmonic oscillator model to numerically verify that the mode spacing of the laser cavity can be modified to be the harmonics of the free spectral range of the Fabry-Perot cavity when the optical length of the laser cavity is close to a commensurate ratio of the optical length of the FabryPerot cavity. In experiment, the Fabry-Perot cavity can be formed by the pump facet of the disordered crystal and the front mirror. A 110 GHz single-pulse harmonically mode-locked pulse train with pulse duration of 857 fs is experimentally achieved under optical lengths of 27.19 and 4.08 mm for the laser cavity and Fabry-Perot cavity respectively, corresponding to a fractional number of 20/3. A maximum output power of 162 mW is obtained at an incident pump power of 3.1 W. (C)2016 Optical Society of America