We demonstrate a compact pulse shaping system based on temporal stacking of pulses in fibres,by which synchronized pulses of ultrashort and nanosecond lasers can be obtained.The system may generate shape-controllable ...We demonstrate a compact pulse shaping system based on temporal stacking of pulses in fibres,by which synchronized pulses of ultrashort and nanosecond lasers can be obtained.The system may generate shape-controllable pulses with a fast rise time and high-resolution within a time window of -2.2ns by adjusting variable optical attenuators in the 32 fibre channels independently.With the help of optical amplifiers,the system delivers mJ-level pulses with a signal-to-noise ratio of-35dB.展开更多
We propose a new method to perform an ultra high speed all optical remote controlled X-NOR logic operation at a very long distance by exploiting the interaction of hypersecant optical soliton pulses (HOSP). To impleme...We propose a new method to perform an ultra high speed all optical remote controlled X-NOR logic operation at a very long distance by exploiting the interaction of hypersecant optical soliton pulses (HOSP). To implement such logic operation,three HOSPs maintaining a particular condition are introduced into an optical fiber where they interact with each other. Two of them carry the input of the logic operation with the constant triggering of other HOSP.展开更多
An Ytterbium-doped mode-locked fiber laser using the polarization sensitive isolator and polarization controllers (PC) is reported. In the normal dispersion, the fiber laser can oscillate at the multi-pulse states by ...An Ytterbium-doped mode-locked fiber laser using the polarization sensitive isolator and polarization controllers (PC) is reported. In the normal dispersion, the fiber laser can oscillate at the multi-pulse states by adjusting the position of the PC. On the condition that the polarization state isn’t changed, the outputs of Ytterbium-doped mode-locked fiber laser change from single pulse to multi-pulse by increasing the pump power. The fiber laser can achieve different multi-pulse output by adjusting the PC1 and PC2 carefully.展开更多
In this paper,the optimum supercontinuum(SC)spectrum generation in a dispersion decreasing fiber is presented.Three normalized parameters for the pump pulse and SC fiber are introduced.It is found that the shape of an...In this paper,the optimum supercontinuum(SC)spectrum generation in a dispersion decreasing fiber is presented.Three normalized parameters for the pump pulse and SC fiber are introduced.It is found that the shape of an SC spectrum is uniquely specified by the input soliton order,the normalized dispersion slope and the normalized effective fiber length.For a pumping condition with a given input soliton order and a given normalized dispersion slope,by optimizing the normalized effective fiber length,the residual spectral peak in the SC spectrum can be suppressed effectively,and a broad SC spectrum with optimum spectral flatness can be obtained.展开更多
We propose the sub-picosecond chirped soliton pulse propagation in copcave-dispersion-flattened fibers （CDFF）. The effects of pulse characteristics and the fiber dispersion parameters on propagation characteristics ...We propose the sub-picosecond chirped soliton pulse propagation in copcave-dispersion-flattened fibers （CDFF）. The effects of pulse characteristics and the fiber dispersion parameters on propagation characteristics of the chirped soliton pulse are numerically investigated in the CDFF by the split-step Fourier method （SSFM）. The unchirped soliton pulse can stably propagate with unchanged pulse width in the CDFE The temporal full width at half maximum （FWHM） of the chirped soliton performs a damped oscillation with the increase of propagation distance. The period and amplitude of the oscillation increase with the increase of the chirp parameter ｜C｜. The effect of high-order dispersion （β3-β6） on soliton propagation characteristics can be neglected. The soliton pulse slightly broadens with the increase of propagation distance and still maintains soliton characteristics when the fiber loss （ATT） is further considered. The variation of root-meansquare （RMS） spectral width with propagation distance is opposite to that of the temporal width. The output spectrum of soliton has a single peak for the unchirped case, while has multi-peak for chirped case. The temporal width of the soliton obviously increases with the increase of the initial width, decreases with the increase of dispersion peakD0 of the fiber, and slightly increases with the decrease of dispersion coefficients k1 and k2 of the fiber.展开更多
基金Supported by the Science and Technology Commission Foundation of Shanghai under Grant Nos 05JC14005 and 05SG02, and the National Natural Science Foundation of China under Grant Nos 60538010, 10376009 and 10576009.
文摘We demonstrate a compact pulse shaping system based on temporal stacking of pulses in fibres,by which synchronized pulses of ultrashort and nanosecond lasers can be obtained.The system may generate shape-controllable pulses with a fast rise time and high-resolution within a time window of -2.2ns by adjusting variable optical attenuators in the 32 fibre channels independently.With the help of optical amplifiers,the system delivers mJ-level pulses with a signal-to-noise ratio of-35dB.
文摘We propose a new method to perform an ultra high speed all optical remote controlled X-NOR logic operation at a very long distance by exploiting the interaction of hypersecant optical soliton pulses (HOSP). To implement such logic operation,three HOSPs maintaining a particular condition are introduced into an optical fiber where they interact with each other. Two of them carry the input of the logic operation with the constant triggering of other HOSP.
基金supported by the National Science Foundationof China ( grating No. 60577019 and No. 60137010)
文摘An Ytterbium-doped mode-locked fiber laser using the polarization sensitive isolator and polarization controllers (PC) is reported. In the normal dispersion, the fiber laser can oscillate at the multi-pulse states by adjusting the position of the PC. On the condition that the polarization state isn’t changed, the outputs of Ytterbium-doped mode-locked fiber laser change from single pulse to multi-pulse by increasing the pump power. The fiber laser can achieve different multi-pulse output by adjusting the PC1 and PC2 carefully.
基金supported by the Guangdong Natural Science Fund(No.1414050001224)the National Instrumentation Program(No.2012YQ14000511)the Guangdong Science and Technology Program(No.2012B090600009)
文摘In this paper,the optimum supercontinuum(SC)spectrum generation in a dispersion decreasing fiber is presented.Three normalized parameters for the pump pulse and SC fiber are introduced.It is found that the shape of an SC spectrum is uniquely specified by the input soliton order,the normalized dispersion slope and the normalized effective fiber length.For a pumping condition with a given input soliton order and a given normalized dispersion slope,by optimizing the normalized effective fiber length,the residual spectral peak in the SC spectrum can be suppressed effectively,and a broad SC spectrum with optimum spectral flatness can be obtained.
基金supported by the National Natural Science Foundation of China(No.60778017)the Shandong Provincial Natural Science Foundation of China(No.ZR2011FM015)the Research Foundation of Liaocheng University of China
文摘We propose the sub-picosecond chirped soliton pulse propagation in copcave-dispersion-flattened fibers （CDFF）. The effects of pulse characteristics and the fiber dispersion parameters on propagation characteristics of the chirped soliton pulse are numerically investigated in the CDFF by the split-step Fourier method （SSFM）. The unchirped soliton pulse can stably propagate with unchanged pulse width in the CDFE The temporal full width at half maximum （FWHM） of the chirped soliton performs a damped oscillation with the increase of propagation distance. The period and amplitude of the oscillation increase with the increase of the chirp parameter ｜C｜. The effect of high-order dispersion （β3-β6） on soliton propagation characteristics can be neglected. The soliton pulse slightly broadens with the increase of propagation distance and still maintains soliton characteristics when the fiber loss （ATT） is further considered. The variation of root-meansquare （RMS） spectral width with propagation distance is opposite to that of the temporal width. The output spectrum of soliton has a single peak for the unchirped case, while has multi-peak for chirped case. The temporal width of the soliton obviously increases with the increase of the initial width, decreases with the increase of dispersion peakD0 of the fiber, and slightly increases with the decrease of dispersion coefficients k1 and k2 of the fiber.
