Browsing by Author "Hsiang, WW"

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Direct generation of 10GHz 816fs pulse train from an asynchronous modelocked Er-fiber laser
(2005)
Lin, CY
;
Hsiang, WW
;
Tien, MF
;
Lai, Y
;
光電工程學系
By employing the technique of asynchronous modelocking (ASM), we have Successfully demonstrated the direct generation of stable 10GHz 816fs Pulse trains with Super-Mode-Suppression-Ratio > 70dB from a hybrid modelocked Er-fiber laser. (c) 2005 Optical Society of America.
Direct generation of a 10 GHz 816 fs pulse train from an erbium-fiber soliton laser with asynchronous phase modulation
(2005-09-15)
Hsiang, WW
;
Lin, CY
;
Tien, MF
;
Lai, YC
;
光電工程學系
By employing the technique of asynchronous mode locking, we have successfully demonstrated direct generation of stable 10 GHz 816 fs pulse trains with a supermode-suppression ratio > 70 dB from a hybrid mode-locked Er-fiber laser. When the modulation frequency deviates from the cavity harmonic frequency by 15-40 kHz, stable femtosecond soliton pulses are formed. Our results demonstrate that asynchronous mode locking can act as an effective mechanism for achieving a shorter pulse width and for stabilizing high-repetition-rate pulse trains in soliton fiber lasers. (c) 2005 Optical Society of America.
Long-term stabilization of a 10 GHz 0.8 ps asynchronously mode-locked Er-fiber soliton laser by deviation-frequency locking
(2006-03-06)
Hsiang, WW
;
Lin, CY
;
Sooi, NK
;
Lai, YC
;
光電工程學系
Without using high speed RF feedback electronics, we successfully demonstrate a novel and economic long-term stabilization scheme for a 10 GHz 0.8 ps asynchronously mode-locked Er-fiber soliton laser by controlling the cavity length to lock the deviation frequency at 25 kHz. The required deviation frequency between the cavity harmonic frequency and the modulation frequency can be directly obtained from the low frequency electronic sideband of the laser output. The same feedback control unit is also useable for higher modulation frequencies, because the suitable deviation frequency always remains within the range of 15 similar to 40 kHz. (c) 2006 Optical Society of America.
Stable new bound soliton pairs in a 10 GHz hybrid frequency modulation mode-locked Er-fiber laser
(2006-06-01)
Hsiang, WW
;
Lin, CY
;
Lai, YC
;
光電工程學系
;
Department of Photonics
We report what is, to our knowledge, the first experimental observation of stable new bound soliton pairs at the 10 GHz repetition rate in a hybrid FM harmonic mode-locked Er-fiber laser (1177 soliton pairs simultaneously in the laser cavity). The two solitons in the soliton pair have the identical pulse shape and are with the antiphase (pi phase difference). Their time separation is about three times the FWHM soliton width and varies with the phase modulation strength. The corresponding mechanism for explaining the formation as well as the superior stability of these closely bound soliton pairs is also given. (c) 2006 Optical Society of America.