共查询到20条相似文献,搜索用时 31 毫秒
1.
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
2.
Passively Q-switched green output with Cr4+:YAG as saturable absorber and PPMgLN as the frequency doubling crystal was realized in a compact diode end-pumped Nd:YVO4 laser. The green light output power, pulse width, pulse repetition rate, pulse energy and peak power with three Cr4+:YAG of different initial transmissions were investigated. The maximum average output power was 1.2 W at the pump power of
4.0 W and the maximum conversion efficiency was 30% with the Cr4+:YAG of 90% initial transmission. The maximum pulse energy and minimum pulse width were 10.9 μJ and 12 ns with the Cr4+:YAG of 75% initial transmission. 相似文献
3.
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
4.
Y. J. Huang Y. P. Huang P. Y. Chiang H. C. Liang K. W. Su Y.-F. Chen 《Applied physics. B, Lasers and optics》2012,106(4):893-898
We report on an efficient high-power passively Q-switched UV laser at 355 nm. We take into account the second threshold criterion
and the thermal-lensing effect to design and realize a compact reliable passively Q-switched Nd:YVO4 laser with Cr4+:YAG as a saturable absorber. At an incident pump power of 16.3 W, the average output power at 1064 nm reaches 6.2 W with
a pulse width of 7 ns and a pulse repetition rate of 56 kHz. Employing the developed passively Q-switched laser to perform
the extra-cavity harmonic generations, the maximum average output powers at 532 nm and 355 nm are up to 2.2 W and 1.62 W,
respectively. 相似文献
5.
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
6.
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
7.
By using a piece of single-walled carbon nanotube saturable absorber, the performance of the passively Q-switched composite
Nd:YVO4 laser has been demonstrated for the first time. The maximum average output power and the shortest pulse width are 1220 mW
and 103 ns at the incident pump power of 5.04 W for a 10% transmission of the output coupler. The highest pulse repetition
rate of 415.6 kHz and the largest single-pulse energy of 2.94 μJ are also obtained. The composite Nd:YVO4 crystal has more excellent laser performance than the normal Nd:YVO4 crystal at 1064 nm. 相似文献
8.
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
9.
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
10.
A passively Q-switched a-cut Nd:YVO4 self-stimulating Raman laser using a Cr:YAG saturable absorber has been demonstrated for the first time. The maximum average
output power of the self-Raman laser at 1176 nm is 347 mW at the incident pump power of 10 W with a pulse repetition frequency
(PRF) of 66 kHz. The pulse width, pulse energy of the 1176 nm are found to be 10 ns and 5.6 μJ. The conversion efficiency
from diode laser input power to Raman output power is 3.47%. 相似文献
11.
Yang Liu Jiasheng Ni Ying Shang Haifeng Qi Chen Wang Wenan Zhao Bing Cao Sheng Huang Chang Li Chang Wang 《Journal of Russian Laser Research》2018,39(6):585-590
We demonstrate an intracavity-triggered passively Q-switched Nd:YVO4 laser within a diode-end-pumped configuration. We employ a Cr4+:YAG saturable absorber as the passive Q switch and an Nd:LiYF4 (YLF) laser as the laser triggering of the Q-switched laser. Since we use the same Cr4+:YAG crystal and output coupler with the Nd:YVO4 laser, the Cr4+:YAG Q switch is triggered inside the Nd:YLF laser cavity. As a result, the timing jitter in standard deviation of Nd:YVO4 laser can be reduced to 16 ns. 相似文献
12.
Passively Q-switched yellow output from a frequency-doubled self-stimulating Raman composite Nd:YVO4/YVO4 laser using a Cr:YAG saturable absorber is reported. Maximum yellow output power of 264 mW was obtained with corresponding
diode to yellow conversion efficiency of 5.9%. 相似文献
13.
We present the performance of diode end-pumped Nd:YVO4 laser in Q-switched and Q-switched mode-locking oscillation using a single-walled carbon nanotube based saturable absorber,
which was fabricated using similar vertical evaporation technique. The average output power, repetition rate and pulse width
of the Q-switched laser output were studied with different output couplers. The maximum average output power was 130 mW. For
Q-switched mode-locking operation, the repetition rate of the mode-locked pulses concentrated in the Q-switched envelope was
58 MHz. The repetition rate of the Q-switched envelope maintained at 18 kHz, while the pulse width decreased along with the
increasing of pump power. The maximum average output power was 53 mW. 相似文献
14.
Passively Q-switched mode-locking in a diode-pumped Nd:LuVO<Subscript>4</Subscript> laser with V:YAG
F. Q. Liu J. L. He J. L. Xu B. T. Zhang J. F. Yang S. Q. Sun J. Q. Xu C. Y. Gao H. J. Zhang 《Laser Physics》2011,21(5):873-876
A passively Q-switched and mode-locked Nd:LuVO4 laser with V:YAG at 1.34 μm was successfully demonstrated. Comparisons between c-cut and a-cut Nd:LuVO4 lasers were experimentally made. The maximum average output power of 170 mW, the highest Q-switched pulse energy of 4.5 μJ
were obtained in c-cut Nd:LuVO4 laser. The duration of mode-locked pulse was estimated to be less than 540 ps with repetition rate of 110 MHz. 相似文献
15.
In the experiment, we have demonstrated the performance of a laser-diode, end-pumped, doubly Q-switched YVO4/Nd:YVO4 laser with both a BBO electric-optic (EO) Q-switch and Cr4+:YAG saturable absorber. At a maximum incident pump power of 15 W and an EO Q-switch repetition rate of 8 kHz, the stable laser pulses with the pulse duration 5.28 ns, the single pulse energy 0.14 mJ, and the pulse peak power 26 kW are obtained. The experimental results show that the double Q-switched laser with EO and Cr4+:YAG can generate the shorter pulse and the higher peak power in comparison to singly Q-switched laser with EO. 相似文献
16.
A single diode-pumped passively Q-switched composite Nd:YAG/Cr4+:YAG laser, which cavity mirrors were deposited directly onto the crystal, was demonstrated in this paper. At the incident
power of 2.75 W, the maximum average output power of 365 mW and the shortest pulse width of 1.7 ns were obtained, corresponding
the repetition rate of 14.6 kHz. The single-pulse energy and the peak power were estimated to be 25 μJ and 14 kW, respectively.
The corresponding optical-optical conversion efficiency was 13.3%. 相似文献
17.
The laser performance of a composite crystal bonded with three Nd:YVO4 single crystals has been investigated for the first time as far as we know. The largest continuous wave output power of 2.68
W is obtained at the incident pump power of 6.2 W, giving an optical conversion efficiency of 43.1% and a slope efficiency
of 45.9%. For passively Q-switched operation with Cr4+:YAG of 71% initial transmission, the shortest pulse width of 18.2 ns, the largest single-pulse energy of 19.9 μJ, and the
highest peak power of 1.12 kW are achieved, with the pulse repetition rate being 44.9 kHz, at the incident pump power of 6.2
W. The composite crystal can generate more excellent laser performance, when compared with the single crystals. 相似文献
18.
K. Cheng S. Z. Zhao D. C. Li K. J. Yang G. Q. Li T. Li G. Zhang B. Zhao 《Laser Physics》2011,21(1):74-78
A diode-pumped passively Q-switched Nd:Lu0.15Y0.85VO4 laser with a GaAs output coupler is demonstrated. By using a mixed crystal Nd:Lu0.15Y0.85VO4 as laser medium, the passively Q-switched laser can generate shorter pulse width with higher peak power in comparison with
the passively Q-switched Nd:LuVO4 or Nd:YVO4 lasers under the same laser cavity. At the incident pump power 11.9 W, the minimum pulse width of 3.23 ns and the maximum
peak power 1.67 kW can be obtained. The average output power and the pulse repetition rate of the laser are also measured.
The experimental results show that the mixed crystal is a promising laser medium for shorter Q-switched pulse with higher
peak power. 相似文献
19.
By simultaneously using both a V3+:YAG and a Co2+:LaMgAl11O19 saturable absorber in the cavity, for the first time to our knowledge, a diode-pumped doubly Q-switched Nd:GdVO4 laser has been realized. The dependence of pulse width, pulse repetition rate, pulse energy and peak power on the incident
pump power are measured. Under the absorbed pump power of 8.59 W, both the pulse temporal profile of the passive double-switching
with the pulse width of 25.29 ns, and the passive single-switching just using V3+:YAG with pulse width of 30.46 ns are obtained. The pulse duration is partly compressed in contrast to the purely passively
Q-switched laser with V3+:YAG. 相似文献
20.
L. Zhang Y. G. Wang H. J. Yu W. Sun Z. H. Han S. B. Zhang W. Hou X. C. Lin J. M. Li J. Tang 《Laser Physics》2012,22(1):133-136
We report on a passively Q-switched and mode-locked Nd:YVO4 laser using a novel low-cost wall-paper graphene oxide absorber. Sandwich structured wallpaper graphene oxide absorber was
constructed by a high transmission mirror, a piece of wallpaper graphene oxide absorber and a reflective mirror. The average
output power of 310 mW of passively Q-switched and mode-locked laser was successfully achieved. The repetition rate and pulse
width of the Q-switched envelope were 213 kHz and 770 ns, respectively. The repetition rate of passively mode-locked pulse
within the Q-switched envelope was 81.3 MHz with the pulse energy of 3.8 nJ. 相似文献