We propose and demonstrate a Q-switched erbium-doped fiber laser （EDFL） using an erbium-doped zirconia-alumina silica glass-based fiber （Zr-EDF） as a saturable absorber. As a 16-cm-long Zr-EDF is incorporated into...We propose and demonstrate a Q-switched erbium-doped fiber laser （EDFL） using an erbium-doped zirconia-alumina silica glass-based fiber （Zr-EDF） as a saturable absorber. As a 16-cm-long Zr-EDF is incorporated into a ring EDFL cavity, a stable Q-switching pulse train operating at 1565？nm wavelength is successfully obtained. The repetition rate is tunable from 33.97？kHz to 71.23？kHz by increasing the pump power from the threshold of 26？mW to the maximum of 74？mW. The highest pulse energy of 26.67？nJ is obtained at the maximum pump power.展开更多
Numerical simulation of diode-pumped Q-switched Nd:YAG laser leading to the generation of eye-safe signal in singly resonant Intracavity Optical Parametric Oscillator (IOPO) is presented. Starting from rate equations,...Numerical simulation of diode-pumped Q-switched Nd:YAG laser leading to the generation of eye-safe signal in singly resonant Intracavity Optical Parametric Oscillator (IOPO) is presented. Starting from rate equations, the time dependent laser equations have been solved numerically, whereas the space-dependent OPO equations analytically. Our results show that 1.4 J diode laser (810 nm) pulse with 200 msec width, delivers 30 mJ Nd:YAG laser (1064 nm) pulse with 5 n-second width. This Nd:YAG laser further generates 9 mJ eye safe signal (1570 nm) pulse with 2.5 n-second width.展开更多
An efficient high-power diode-pumped femtosecond Yb：KGW laser is repored. Through optimization of energy density by semiconductor saturable absorber mirror, output power achieved 2.4 W with pulse duration of 350 fs a...An efficient high-power diode-pumped femtosecond Yb：KGW laser is repored. Through optimization of energy density by semiconductor saturable absorber mirror, output power achieved 2.4 W with pulse duration of 350 fs and repetition rate of 53 MHz at a pump power of 12.5 W, corresponding to an optical-to-optical efficiency of 19.2%. We believe that it is the highest optical-to-optical efficiency for single-diode-numoed bulk Yb：KGW femtosecond lasers to date.展开更多
We report on a high-repetition-rate,high-power continuously pumped Nd:GdVO4 regenerative amplifier.Numerical simulations successfully pinpoint the optimum working point free of bifurcation instability with simultaneou...We report on a high-repetition-rate,high-power continuously pumped Nd:GdVO4 regenerative amplifier.Numerical simulations successfully pinpoint the optimum working point free of bifurcation instability with simultaneous efficient energy extraction.At a repetition rate of 100 kHz,a maximum output power of 23 W was obtained with a pulse duration of 27 ps,corresponding to a pulse energy of 230 μJ.The system displayed an outstanding stability with a root mean square power noise as low as 0.3%.The geometry of the optical resonator and the pumping scheme enhanced output power in the TEM00 mode with a single bulk crystal.Accordingly,nearly diffraction-limited beam quality was produced with M2≈1.2 at full pump power.展开更多
基金Supported by the Postgraduate Research of Malaysia under Grant No PG098-2014Bthe CSIR of Government of India
文摘We propose and demonstrate a Q-switched erbium-doped fiber laser （EDFL） using an erbium-doped zirconia-alumina silica glass-based fiber （Zr-EDF） as a saturable absorber. As a 16-cm-long Zr-EDF is incorporated into a ring EDFL cavity, a stable Q-switching pulse train operating at 1565？nm wavelength is successfully obtained. The repetition rate is tunable from 33.97？kHz to 71.23？kHz by increasing the pump power from the threshold of 26？mW to the maximum of 74？mW. The highest pulse energy of 26.67？nJ is obtained at the maximum pump power.
文摘Numerical simulation of diode-pumped Q-switched Nd:YAG laser leading to the generation of eye-safe signal in singly resonant Intracavity Optical Parametric Oscillator (IOPO) is presented. Starting from rate equations, the time dependent laser equations have been solved numerically, whereas the space-dependent OPO equations analytically. Our results show that 1.4 J diode laser (810 nm) pulse with 200 msec width, delivers 30 mJ Nd:YAG laser (1064 nm) pulse with 5 n-second width. This Nd:YAG laser further generates 9 mJ eye safe signal (1570 nm) pulse with 2.5 n-second width.
基金supported by the National Science Foundation of China under Grant No. 60921004
文摘An efficient high-power diode-pumped femtosecond Yb：KGW laser is repored. Through optimization of energy density by semiconductor saturable absorber mirror, output power achieved 2.4 W with pulse duration of 350 fs and repetition rate of 53 MHz at a pump power of 12.5 W, corresponding to an optical-to-optical efficiency of 19.2%. We believe that it is the highest optical-to-optical efficiency for single-diode-numoed bulk Yb：KGW femtosecond lasers to date.
基金supported by the Ministry of Science and Technology of the People’s Republic of China(MOST)(No.2017YFB0405202)
文摘We report on a high-repetition-rate,high-power continuously pumped Nd:GdVO4 regenerative amplifier.Numerical simulations successfully pinpoint the optimum working point free of bifurcation instability with simultaneous efficient energy extraction.At a repetition rate of 100 kHz,a maximum output power of 23 W was obtained with a pulse duration of 27 ps,corresponding to a pulse energy of 230 μJ.The system displayed an outstanding stability with a root mean square power noise as low as 0.3%.The geometry of the optical resonator and the pumping scheme enhanced output power in the TEM00 mode with a single bulk crystal.Accordingly,nearly diffraction-limited beam quality was produced with M2≈1.2 at full pump power.
