共查询到20条相似文献,搜索用时 15 毫秒
1.
A diode-pumped actively Q-switched Nd:GdVO4 green laser with periodically poled KTP (PPKTP) and Acoustic-optic (AO) modulator has been realized. The dependences of pulse energy, pulse width, and peak power on incident pump power are measured. At the pump power of 4.1 W and repetition rate of 10 kHZ, we can obtain a 19.2 ns pulse with pulse energy of 0.11 mJ and peak power of 5.8 kW, which are almost three times of that in the conventional KTP green laser, respectively. A rate equation model is introduced to theoretically analyze the results obtained in the experiment, in which the Gaussian spatial distribution of the intracavity photon density is taken into account. The numerical solutions of the rate equations agree with the experimental results. 相似文献
2.
Diode-pumped simultaneously Q-switched and mode-locked Nd:GdVO<Subscript>4</Subscript>/LBO red Laser
Z. -Y. Li B. -T. Zhang J. -F. Yang J. -L. He H. -T. Huang C. -H. Zuo J. -L. Xu X. -Q. Yang S. Zhao 《Laser Physics》2010,20(4):761-765
A diode-end-pumped simultaneously Q-switched and mode-locked intracavity frequency doubled Nd:GdVO4/LBO red laser with an acousto-optic Q-switch was realized. The maximum red laser output power of 250 mW was obtained at the
incident pump power of 8.3 W and the repetition rate of 10 kHz. At 5 kHz, the maximum mode-locking modulation depth of about
80% was achieved with the Q-switched pulse width of 440 ns. The red mode-locked pulse inside the Q-switched pulse had a repetition
rate of 115 MHz, its average pulse width was estimated to be about 350 ps. 相似文献
3.
By simple extra-cavity frequency conversion, the performance of a diode single-end-pumped AO Q-switched Nd:GdVO4/KTP/BBO 266 nm laser was demonstrated. Under the incident pump power of 14.32 W, the maximum average output power at 266
nm was 374 mW at the repetition of 20 kHz; the opticaloptical conversion efficiency was 2.6%. The corresponding pulse width
was 5 ns, with the single-pulse energy and peak power calculated to be 18.7 μJ and 3.74 kW, respectively. The dependence of
the operational parameters on the pump power was also investigated experimentally. 相似文献
4.
S. C. Huang H. L. Chang K. W. Su A. Li S. C. Liu Y. F. Chen K. F. Huang 《Applied physics. B, Lasers and optics》2009,94(3):483-487
An AlGaInAs quantum-well structure grown on a Fe-doped InP transparent substrate is developed to be a gain medium in a high-peak-power
nanosecond laser at 1570 nm. Using an actively Q-witched 1064 nm laser to pump the gain chip, an average output power of 135 mW
is generated at a pulse repetition rate of 30 kHz and an average pump power of 1.25 W. At a pulse repetition rate of 20 kHz,
the peak output power is up to 290 W at a peak pump power of 2.3 kW. 相似文献
5.
F. Q. Liu H. R. Xia Z. C. Ling S. Q. Sun D. G. Ran W. L. Gao J. L. He H. J. Zhang J. Y. Wang 《Laser Physics》2008,18(8):954-957
A simple and compact diode-pumped acousto-optically Q-switched intracavity frequency-doubled Nd:LuVO4/KTP green laser were demonstrated successfully for the first time. At an incident pump power of 6.5 W, an average output power of 663 mW, a pulse width of 26 ns were obtained with a PRF of 10 kHz. The pulse energy and peak power of the green light were determined to be 66.3 μJ and 2.55 kW, respectively. 相似文献
6.
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
7.
F. Chen X. Yu C. Wang R. P. Yan X. D. Li J. Gao Z. H. Zhang J. H. Yu 《Laser Physics》2010,20(6):1275-1278
A diode-end-pumped passively Q-switched 912 nm Nd:GdVO4/Cr:YAG laser is demonstrated for the first time. In a concave-piano cavity, pulsed 912 nm laser performance is investigated
using two kinds of Cr:YAG crystal with different unsaturated transmission (T
U) of 95% and 90% at 912 nm as the saturable absorbers. When the T
U = 90% Cr:YAG is used, as much as 2.6 W average output power for short pulsed 912 nm laser is achieved at an absorbed pump
power of 34.0 W, corresponding to an optical efficiency of 7.6% and a slope efficiency of 20.3%. Moreover, 10.5 ns duration
pulses and up to 2.3 kW peak power is obtained at the repetition rate around 81.6 kHz. 相似文献
8.
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
9.
F. Chen X. Yu R. P. Yan X. D. Li G. L. Yang D. J. Li J. J. Xie L. M. Zhang J. Guo L. H. Guo 《Laser Physics》2012,22(2):347-350
A diode-pumped high-repetition-rate acousto-optically (A-O) Q-switched Nd:YVO4 laser operating at 914 nm was reported in this paper. Employing a compact linear laser cavity, at an operating repetition
rate of 10 kHz, a maximum average output power of 2.2 W 914 nm laser was obtained at an incident pump power of 45.3 W, corresponding
to an optical conversion efficiency of 4.9% and a slope efficiency of 8.8%. Minimum pulse width of 24 ns and maximum peak
power of 8.0 kW of 914 nm laser was also achieved at an incident pump power of 40.8 W. To the best of our knowledge, this
is the highest peak power of 914 nm laser at 10 kHz by far. Moreover, the highest operating repetition rate of pulsed 914
nm can even reach 100 kHz. 相似文献
10.
We experimentally demonstrated a high-efficiency passively Q-switched Yb:CaYAlO4 (Yb:CYA) laser based on a semiconductor-saturable absorber mirror (SESAM), and the output characteristics of the laser including the average output power, repetition frequency, pulse duration, pulse energy and pulse peak power were investigated by adopting output mirrors with different transmittances. When the transmittance of the output mirror was 5% and the pump power was set at about 7.76 W, a maximum average output power of as high as 2.480 W was achieved with a slope efficiency and light-to-light efficiency of the Q-switched Yb:CYA laser of up to 37.1% and 31.2%, respectively. 相似文献
11.
Y. F. Ma X. Yu X. D. Li J. Gao J. B. Peng F. Chen Z. Zhang J. H. Yu 《Laser Physics》2008,18(12):1505-1507
A planoconvex cavity is used to compensate the thermal lens effectively for a Q-switched Nd:GdVO4 laser. The good beam quality of the continuous-wave (CW) output laser was obtained and the performances of the Q-switched laser were improved remarkably. The pulse width reduced and the output ratio of the Q-switching to free running increased resulting from the good beam quality of the planoconvex cavity compared with those used on a flat-flat cavity. 相似文献
12.
The differences between the performances of electro-optical (EO) and acousto-optical (AO) Q-switched, diode pumped Nd:GdVO4 laser at high repetition rates were detailed in this paper. The results revealed that EO Q-switch was more favorable to obtain
short pulse width and high peak power laser than AO Q-switch under high repetition rate operation. The minimum pulse widths
at 100 kHz were 20.2 ns under EO operation and 28.7 ns under AO operation, corresponding to peak powers of 3.1 kW and 2.2
kW, respectively. The corresponding values at 10 kHz were 5.3 ns, 9.0 ns and 77.4 kW, 45.6 kW, respectively. 相似文献
13.
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
14.
Symmetric and short green-pulse generation by doubly Q-switched Nd:YVO<Subscript>4</Subscript> laser
A compact diode-pumped doubly Q-switched extracavity frequency-doubled Nd:YVO4/KTP green-pulse laser was demonstrated, using both an acoustic-optic (AO) modulator and a GaAs saturable absorber in a simple
flat-flat cavity. The green laser can generate a more symmetric and shorter pulse when compared with purely AO and passively
Q-switched lasers. A peak power of 7.54 kW with the corresponding pulse width of 3.2 ns has been achieved with the incident
pump power of 7.76 W and f
p
= 15 kHz. A reasonable analysis about the experimental results has been given. 相似文献
15.
An efficient diode-pumped passively Q-switched Nd:GdVO4/Cr4+:YAG laser was employed to generate a high-repetition-rate, high-peak-power eye-safe laser beam with an intracavity optical parametric oscillator (OPO) based on a KTP crystal. The conversion efficiency for the average power is 8.3% from pump diode input to OPO signal output and the slope efficiency is up to 10%. At an incident pump power of 14.5 W, the compact intracavity OPO cavity, operating at 46 kHz, produces average powers at 1571 nm up to 1.2 W with a pulse width as short as 700 ps. PACS 42.60.Gd; 42.65.Yj; 42.55.X 相似文献
16.
Diode end-pumped single-frequency Tm:GdVO4 laser at room temperature was reported. The maximal output power of single-frequency is as high as 51 mW by using two uncoated
fused YAG etalons, which are respectively 0.05 mm thick and 1 mm thick. We obtained the single frequency Tm:GdVO4 laser at 1919.7 nm. The slope efficiency is 1.4%. The single-longitudinal-mode (SLM) laser can be used as a seed laser for
coherent wind measurements and differential absorption LIDAR systems. 相似文献
17.
Two graphene oxide saturable absorbers (GO-SAs) spin coated on indium tin oxide (ITO) substrate have been prepared and their transmissivity spectra have also been measured. The performance of the diode-pumped passively Q-switched Nd:YVO4 laser with GO-SA has been investigated for the first time. The shortest pulse width of 113 ns and the highest peak power of 4.3 W are obtained at the pump power of 5.04 W. The output laser characteristics have demonstrated that graphene oxide is a promising saturable absorber for passive Q-switching. 相似文献
18.
B. Y. Zhang G. J. Wang W. J. Wang Y. L. Liu X. X. Gao M. Chen G. Li 《Laser Physics》2011,21(12):2045-2048
We report a cavity-dumped mode-locked Nd:GdVO4 laser with semiconductor saturable absorber mirrors at low repetition rate. In this laser system, a single mode-locked laser
pulse is generated, amplified and cavity-dumped by means of electro-optic modulator at 1 to 10 Hz repetition rate. The energy
of the pulse is about 150 nJ and the pulse duration is determined to be 10 ps. 相似文献
19.
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
20.
We present a laser architecture to obtain continuous-wave blue radiation at 488 nm. A 808 nm diode-pumped the Nd:YVO4 crystal emitting at 914 nm. A part of the pump power was then absorbed by the Nd:YVO4 crystal. The remaining was used to pump the Nd:YLiF4 (Nd:YLF) crystal emitting at 1047 nm. Intracavity sum-frequency mixing at 914 and 1047 nm was then realized in a BiB3O6 (BiBO) crystal to reach the blue radiation. We obtained a continuous-wave output power of 339 mW at 488 nm with a pump laser diode emitting 18.3 W at 808 nm. 相似文献