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1.
Using a V3+:YAG saturable absorber, we realize the running of a laser-diode end-pumped passively Q-switched intracavity-frequency-doubling
Nd:GdVO4/KTP red laser. Under the absorbed pump power of 9.45 W and with V3+:YAG initial transmission T
0 = 94%, the obtained average output power and pulse width were 610 mW and 15.09 ns with the repetition rate of 12.2 kHz, corresponding
to the single pulse energy 50 μJ and the pulse peak power 3.34 kW. 相似文献
2.
H. W. Yang H. T. Huang J. L. He S. D. Liu F. Q. Liu X. Q. Yang J. L. Xu J. F. Yang B. T. Zhang 《Laser Physics》2011,21(1):66-69
The character of a diode-pumped passively Q-switched Nd:GdVO4/V3+:YAG 912 nm laser was demonstrated for the first time to our knowledge. With an absorbed pump power of 7.4 W, an average output
power of 360 mW with a Q-switched pulse width of 328 ns at a pulse repetition rate of 163 kHz was obtained. The Q-switching
efficiency was found to be 32.7%. Our work further indicated V3+:YAG could be an effective fast passive Q-switch for 0.9 μm radiation. 相似文献
3.
By simultaneously using both an acoustic-optic (AO) modulator and a V3+:YAG saturable absorber in the cavity, for the first time to our knowledge, a diode-pumped doubly Q-switched Nd:GdVO 4 laser has been realized. The dependence of pulse width, pulse energy and peak power on the incident pump power at determinate pulse repetition rate are measured. Under the absorbed pump power of 8.59 W, the pulse temporal profile of the AO-switching with the pulse duration of 14.5 ns, the double Q-switching with pulse duration of 7.6 ns at 10 kHz, and the passive Q-switching with pulse duration of 22.3 ns are obtained. The pulse duration is obviously compressed in contrast to the purely actively AO Q-switched laser or the purely passively Q-switched laser with V3+:YAG. 相似文献
4.
K. Yang S. Zhao G. Li J. Zou P. Song W. Wu 《Applied physics. B, Lasers and optics》2005,80(6):687-692
By simultaneously using both an acoustic-optic (AO) modulator and a Cr4+:YAG saturable absorber in the cavity, for the first time, a diode-pumped doubly Q-switched Nd:GdVO4 laser has been realized. The pulse duration is obviously compressed in contrast to the actively acoustic-optic Q-switched laser. By considering the Gaussian transversal distribution of the intracavity photon density and the longitudinal distribution of the photon density along the cavity axis as well as the influence of turnoff time of the acoustic-optic (AO) Q-switch, we provide the coupled rate equations for a diode-pumped doubly Q-switched Nd:GdVO4 laser with both an acoustic-optic (AO) modulator and a Cr4+:YAG saturable absorber. These coupled rate equations are solved numerically, and the dependence of pulse width, pulse energy and peak power on the incident pump power at different pulse repetition rates is obtained. The numerical solutions of equations agree well with the experimental results.This revised version was published online in August 2005 with a corrected cover date. 相似文献
5.
The performance of a LD-end-pumped passively Q-switched Nd:YAG ceramic laser at 1319 nm with a V3+:YAG saturable absorber was demonstrated for the first time to the best of our knowledge. The average output power of 1.8
W was obtained under the pump power of 23.7 W, corresponding to the optical conversion efficiency of 7.8% and slope efficiency
of 9%. The minimum pulse width was 128 ns with the pulse repetition rate of 230 kHz, which was attained with a T = 2.8% output coupler at the pump power of 23.7 W. 相似文献
6.
By using both an acoustooptical (AO) modulator and a Cr4+:YAG saturable absorber in the cavity, a diode-pumped doubly Q-switched Nd:GdVO4 laser, which can generate short pulses with high peak powers and symmetric temporal profiles, has been demonstrated. A peak power of 3.05 kW with a corresponding pulse width of 16 ns has been achieved at an incident pump power of 7.7 W. A reasonable analysis about the experimental results has been given by considering the ground-state absorption and excited-state absorption of a Cr4+:YAG crystal. 相似文献
7.
A passively Q-switched 1.06 μm laser with Cr4+:YAG saturable absorber by direct 879 nm diode pumping grown-together composite GdVO4/Nd:GdVO4 crystal to the emitting level was demonstrated in this paper. The characteristics of pulsed laser were investigated by using
two kinds of Cr4+:YAG crystal with the initial transmissivity of 80 and 90%, respectively. When the T
0 = 90% Cr4+:YAG was used, an average output power of 1.59 W was achieved at an incident pump power of 10 W. The pulse width and repetition
rate were 64.5 ns and 170 kHz, respectively. The thermal lens effect of laser crystal was analyzed. 相似文献
8.
By using both V3+:YAG and Co:LMA saturable absorbers, a doubly passively Q-switched laser is realized for the first time. The shorter pulse
with the higher peak power is generated in comparison to the singly passively Q-switched laser with V3+:YAG or Co:LMA saturable absorber. The experimental results shows that it is possible to obtain a shorter pulse with the higher
peak power in a doubly passively Q-switched laser. 相似文献
9.
J.-L. Xu H.-T. Huang J.-L. He J.-F. Yang B.-T. Zhang X.-Q. Yang F.-Q. Liu 《Applied physics. B, Lasers and optics》2011,103(1):75-82
The efficient dual-wavelength oscillation at 1064 and 1342 nm in the passively Q-switched laser based on Nd:YVO4/V3+:YAG is successfully obtained, as demonstrated in this paper. A total average output power of 2.2 W is obtained with 1.3 W
for 1064 nm and 0.9 W for 1342 nm under the incident pump power of 7.7 W, corresponding to a total optical-optical conversion
efficiency of 28.2%. The pulse widths are 58 and 54 ns for 1064 and 1342 nm, respectively, with the repetition rate of 89
kHz. Moreover, a rate equation model considering the Gaussian spatial distributions of the intracavity photon density and
the initial population-inversion density is presented to characterize the dual-wavelength passive Q-switching operation. 相似文献
10.
By using both V3+:YAG and Co:LMA saturable absorbers, an xenon-lamp-pumped doubly passively Q-switched and mode-locked (QML) Nd:YAG laser at
1.3 μm in a straight cavity is realized for the first time. The modulation depth of QML pulse has nearly reached 100%. The
experimental results shows that the doubly passively Q-switched and mode-locked (QML) laser can generate shorter Q-switch
envelope pulse with higher average peak power in comparison to the singly passively QML laser with V3+:YAG or Co:LMA saturable absorber. 相似文献
11.
This work presents experimental results concerning a passively Q-switched intracavity frequencydoubled Nd:LuVO4/LBO green laser with a Cr4+:YAG saturable absorber operated at the wavelength of 0.53 μm. A maximal output power of 1.28 W was obtained at a pump power
of 16.34 W, and peak power, pulse width as well as repetition frequency were 1.48 kW, 41 ns and 21 kHz, respectively. 相似文献
12.
We have realized, for the first time to our knowledge, the passive Q-switching operation of an LD-pumped Nd:GdVO4 laser at 1342 nm with V:YAG saturable absorber of initial transmission as high as 96%. This laser is investigated under different
transmissions of the output coupler. The dependences of average output power, pulse width, pulse repetition rate, single-pulse
energy and peak power on incident pump power are also measured. The shortest pulse width of 80 ns, the maximum single-pulse
energy of 19.5 μJ and the highest peak power of 244 W are obtained with the output coupler of T = 15% and the pump power of 7.93 W. We find a special experimental phenomenon that the pulse repetition rate begins to drop
after reaching the peak with the increase of the pump power. This phenomenon is analyzed and the theoretical calculations
are consistent with the experimental results. 相似文献
13.
I report the first demonstration of the generation of efficient sub-nanosecond self-stimulated Raman pulses by a diode-pumped passively Q-switched Nd:GdVO4/Cr4+:YAG laser. The conversion efficiency for the average power is 7% from pump diode input to self-Raman output and the slope efficiency is up to 14%. At an incident pump power of 2.0 W, the pulse duration, pulse energy, and peak power for the Stokes wavelength of 1175.6 nm were found to be 750 ps, 6.3 J, and 8.4 kW, respectively, with a pulse-repetition rate of 22 kHz. PACS 42.55.Ye; 42.55.Xi; 42.60.Gd 相似文献
14.
Nd3+:NaY(WO4)2, known as Nd:NYW, is a new type crystal. By using laser-diode as pump source, a passive Q-switching of intracavity-frequency-doubling Nd:NYW/KTP laser has been realized with Cr4+:YAG saturable absorber. The dependence of pulse repetition rate, pulse energy, pulse width, and peak power on incident pump power for different small-signal transmissions of Cr4+:YAG are measured. The coupled rate equations are used to simulate the Q-switched process of laser, and the numerical solutions agree with the experimental results. 相似文献
15.
We report on a diode end-pumped passively mode-locked Nd:GdVO4 laser. By using a GaAs wafer simultaneously as the saturable absorber and the output coupler, stable continuous-wave mode locking was achieved. The pulse width was measured to be 18.9 picoseconds at a repetition rate of 370 MHz. The most remarkable property of the laser is that its repetition rate can be changed from 370 MHz to 3.348 GHz by simply changing the cavity length. An average output power of 3.46 W at a 3.348 GHz repetition rate was obtained with a 14 W pump power. To our knowledge, this is the first demonstration of a passively mode-locked Nd:GdVO4 laser using a GaAs wafer as the saturable absorber. PACS 42.55.Rz; 42.60.Fc; 42.55.Xi. 相似文献
16.
J. M. Jiang Z. Zhuo T. Li H. B. Qin C. X. Shan J. Li B. Zhao J. Z. Chen 《Laser Physics》2011,21(8):1358-1361
A diode pumped Nd:Y0.5Lu0.5VO4 pulse laser modulated with an acousto-optic (AO) Q-switcher and Cr4+:YAG saturable absorber is first demonstrated in this paper. The laser is shown to generate shorter pulse width than AO Q-switched
laser alone, and have a higher peak power and single pulse energy than passively Q-switched laser with only Cr4+:YAG. A laser pulse width of 6.16 ns and a peak power of about 43.83 kW are achieved at the incident pumping power of 14.09
W. 相似文献
17.
We report on a passively Q-switched diode-pumped Nd:YVO4 laser polarized along the a axis (corresponding to the smallest value of emission cross section at 1064 nm), generating 157-μJ
pulses with 6.0-ns time duration (>20 kW peak power) and 3.6 W of average power at 1064 nm with good beam quality (M2<1.4). The selection of the polarization was performed by a novel technique relying on the birefringence of the laser crystal
and on the misalignment sensitivity of the resonator.
Received: 30 September 2002 /
Revised version: 22 November 2002 / Published online: 19 March 2003
RID="*"
ID="*"Corresponding author. Fax: +39-382/422583, E-mail: agnesi@ele.unipv.it 相似文献
18.
H.T. Huang J.L. He C.H. Zuo H.J. Zhang J.Y. Wang Y. Liu H.T. Wang 《Applied physics. B, Lasers and optics》2007,89(2-3):319-321
We have demonstrated an efficient diode-pumped passively Q-switched Nd:YVO4 laser at 1342 nm by using an uncoated Co2+:LaMgAl11O19 (Co2+:LMA) crystal as the saturable absorber. With the absorbed pump power of 11.7 W, the pulse width could be as low as 42 ns,
with a corresponding average output power of 580 mW. At around 40 kHz repetition rate, the energy of a single Q-switched pulse
was estimated to be about 14.5 μJ and the peak power was 346 W. The passive Q switching operation for the Co2+:LMA in different polarization states was also investigated.
PACS 42.55.-f; 42.55.Xi; 42.60.Gd; 42.70.Mp 相似文献
19.
A diode end-pumped passively Q-switched Nd:YVO4 laser with a transmission-type single-walled carbon nanotube saturable absorber is first demonstrated in this paper. The
maximum continuous wave (CW) output power of 477 mW is obtained at the incident pump power of 1490 mW with the output transmission
T = 10%, resulting in slope efficiency of 41.3%. For Q-switching operation, the measured pulse duration of 332 ns, the pulse
energy of 326 nJ and the peak power of 982 mW are respectively obtained. 相似文献
20.
By varying the positions of the saturable absorber in the laser axis and the pump beam waist in the gain medium, respectively, we have theoretically and experimentally studied the control of the pulse width in a diode-pumped passively Q-switched Nd:YVO4/KTP green laser with GaAs saturable absorber. A rate equation model is introduced, in which the intracavity photon density is assumed to be Gaussian spatial distribution, the longitudinal variation of the intracavity photon density and the pump beam spatial distribution are also considered. The experimental results are consistent with the numerical calculations of the rate equations. 相似文献