共查询到20条相似文献,搜索用时 109 毫秒
1.
Junhai Liu Valentin Petrov Huaijin Zhang Jiyang Wang 《Applied physics. B, Lasers and optics》2007,88(4):527-530
The power scaling capacity of a diode end-pumped Yb:KLu(WO4)2 laser, operating in the continuous-wave (cw) and passively Q-switched regimes, has been investigated. A cw output power of
11.5 W was achieved with an optical-to-optical efficiency of 41% with respect to the incident pump power, while the slope
efficiency amounts to 60%. The passively Q-switchedoperation yielded an average output power of 4.3 W at the fundamental wavelength
of 1031.7 nm, and 1.15 W of Raman radiation at 1139.3 nm. The total slope efficiency for Q-switched operation was 40%. The
highest pulse energy, duration, and peak power were 170 μJ, 2.2 ns, and 77.3 kW for the fundamental radiation, and 51 μJ,
2.3 ns, and 22.2 kW for the Raman radiation.
PACS 42.55.Rz; 42.55.Xi; 42.55.Ye 相似文献
2.
A passively Q-switched waveguide laser, to our knowledge, has been firstly demonstrated in Nd: YVO4 crystal formed by 3 MeV Si+ ion implantation at a dose of 1 × 1015 ions/cm2 at room temperature, in which GaAs was used as saturable absorber. The dependences of the average output power, pulse width,
pulse repetition rate on absorbed pump power have been measured at different output plane mirror transmissions. At an absorbed
pump power of 78.8 mW and output transmission of 20%, the shortest pulse width of 3.88 ns was obtained, corresponding to the
peak power and single pulse energy of 212 W and 0.82 μJ, respectively. The threshold pump power was as low as 40 mW, and the
slope efficiency was about 64.5% when the absorbed pump power was lower than 70 mW. 相似文献
3.
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
4.
By using a-cut Nd:Lu0.15Y0.85VO4 mixed crystal as laser gain medium, a diode-pumped passively Q-switched and mode-locked (QML) laser with a GaAs saturable
absorber in a Z-type folded cavity is demonstrated for the first time. The Q-switched mode-locked laser pulses with about 90% modulation
depth are obtained as long as the pump power reached the oscillation threshold. The repetition rate of the passively Q-switched
pulse envelope ranges from 50 to 186 kHz as the pump power increases from 0.915 to 6.520 W. Under an incident pump power of
6.52 W, the QML pulses with the largest average output power of 694 mW, the shortest pulse width of 200 ns and the highest
pulse energy of 3.73 μJ are obtained. The mode-locked pulse width inside the Q-switched envelope is estimated to be about
275 ps. The experimental results show that Nd:Lu0.15Y0.85VO4 is a promising mixed crystal for QML laser. 相似文献
5.
Efficient passive mode locking of a diode-pumped Yb3+:LuYSiO5 (Yb:LYSO) laser is first demonstrated in experiment using a semiconductor saturable absorber mirror (SESAM), to the best
of our knowledge. A stable pulse train with a repetition rate of 101 MHz is generated. The average output power of 2.13 W
and the pulse duration of 3.9 ps. With a pair of SF10 uncoated prisms for dispersion compensation, we obtained pulses as short
as 780 fs with center wavelength around 1042 nm, the average output power of 1.03 W and the peak power of 13.1 kW. 相似文献
6.
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
7.
Room temperature efficient continuous wave and Q-switched operation of a Ho:YAP laser 总被引:1,自引:0,他引:1
X. M. Duan B. Q. Yao X. T. Yang T. H. Wang Y. L. Ju Y. Z. Wang 《Applied physics. B, Lasers and optics》2009,96(2-3):379-383
We report the continuous wave and acousto-optically Q-switched operation of a Tm:YLF-pumped Ho:YAP laser at room temperature. Continuous wave output power of 6.8 W at 2118 nm was obtained under the incident pump power of 13.4 W, corresponding to a slope efficiency of 65.6% and a conversion efficiency of 50.7%. For the Q-switched mode, a maximum pulse energy of 1.28 mJ and a minimum pulse width of 31 ns at the repetition rate of 5 kHz were achieved, resulting in a peak power of 41.3 kW. In addition, the Ho:YAP laser was employed as a pumping source of ZGP optical parametric oscillator, the total average output power of which was 3.2 W at 4.08 and 4.41 μm with a slope efficiency of 69.5%, corresponding to the diode-to-mid-IR conversion efficiency of 9.0%. 相似文献
8.
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
9.
H. Ge S. Zhao Y. Li G. Li D. Li K. Yang M. Li G. Zhang K. Cheng Z. Yu 《Laser Physics》2009,19(6):1226-1229
We present a compact passively Q-switched mode-locked Nd:LuVO4 laser run in a Z-type folded cavity with semiconductor saturable absorber mirror (SESAM). The repetition rates of the passively Q-switched pulse envelope ranges from 22.99 to 141.18 kHz as the pump power increased from 2.372 to 8.960 W. The repetition rates of mode-locked laser pulses in the Q-switched pulse envelope has 111 MHz determined by the cavity length and the mode-locked pulse duration is evaluated to be 257 ps. An average output power of 823.5 mW is achieved at the pump power of 8.96 W, corresponding to an optical conversion efficiency of 9.2%. 相似文献
10.
M. Wang S. Zhang Y. Tang L. Xu Y. Wang C. Zhao Y. Hang W. Chen 《Applied physics. B, Lasers and optics》2011,104(4):829-833
An efficient laser diode end-pumped continuous-wave (CW) and AO Q-switched laser of Nd:LiLuF4 crystal with dual central wavelengths of 1053.1 and 1054.7 nm is reported for the first time. The maximum CW output power
of 6.22 W was obtained at absorbed pump power of ∼14.6 W with the output transmission of 2%. The optical conversion efficiency
is ∼43%, corresponding to a slope efficiency of about 48% with respect to the absorbed pump. For the Q-switched operation,
the shortest pulse width of 17 ns was obtained at the pulse repetition frequency (PRF) of 0.5 kHz, resulting in a pulse energy
of 2.24 mJ and peak power of 131.8 kW. 相似文献
11.
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
12.
In this paper, we report a 18.8 W continuous wave and 18.4 W Q-switched diode-pumped cryogenic Tm(5 at %), Ho(0.5 at %):GdVO4 laser. The pumping source of Tm, Ho:GdVO4 laser is a fiber-coupled laser diode with fiber core diameter of 0.4 mm, supplying 42 W power at 802.5 nm. For input pump
power of 41.9 W at 802.4 nm, the output power of 18.8 W in CW operation, optical-to-optical conversion efficiency of 45% at
2.05 μm and the average output power of 18.4 W in Q-switched operation, optical-to-optical conversion efficiency of 44% at
2.04 and 2.05 μm have been attained. The emission wavelengths of the Tm(5 at %), Ho(0.5 at %):GdVO4 laser were firstly compared when it worked in CW mode and Q-switched mode. 相似文献
13.
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
14.
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
15.
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
16.
C.-Y. Tu Y. Wang J.-L. Xu J.-L. He H.-T. Huang J.-F. Yang B.-T. Zhang 《Applied physics. B, Lasers and optics》2010,101(4):855-860
Q-switching and Q-switched mode-locked Yb:Y2Ca3B4O12 lasers with an acousto-optic switch are demonstrated. In the Q-switching case, an average output power of 530 mW is obtained at the pulse repetition rate of 10.0 kHz under an absorbed pump power of 6.1 W. The minimum pulse width is 79 ns at the repetition rate of 1.7 kHz. The pulse energy and peak energy are calculated to be 231 μJ and 2.03 kW, respectively. In the Q-switched mode-locking case, the average output power of 64 mW with a mode-locked pulse repetition rate of 118 MHz and Q-switched pulse energy of 48 μJ is generated under the absorbed pump power of 6.1 W. 相似文献
17.
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
18.
G. Q. Xie L. J. Qian X. D. Xu Y. Cheng Z. W. Zhao D. Y. Tang J. Zhang W. D. Tan J. Xu 《Laser Physics》2010,20(6):1331-1334
We have experimentally demonstrated a diode-pumped passively mode-locked Nd:CaNb2O6 laser for the first time to our best knowledge. With a semiconductor saturable absorber mirror (SESAM) as a passive mode
locker, the laser generated stable mode-locked pulses with pulse duration of 17.3 ps and repetition rate of 88.4 MHz. With
a singe-emitter laser diode pumping, the maximum average output power of the mode-locked laser was 0.843 W, with a slope efficiency
of 23%. The experimental results show the Nd:CaNb2O6 crystal is a promising laser gain medium for picosecond pulse generation. 相似文献
19.
F. Q. Liu J. L. He J. L. Xu J. F. Yang B. T. Zhang H. T. Huang C. Y. Gao J. Q. Xu H. J. Zhang 《Laser Physics》2010,20(4):786-789
A diode-pumped passively Q-switched Nd:LuVO4 1.34 μm laser using Co:LMA saturable absorber was successfully demonstrated. The average output power, pulse width, repetition
rate of a-cut and c-cut Nd:LuVO4 lasers were studied with different output couplers. The maximum average output power of 164 mW was obtained at the pump power
of 10.3 W and the narrowest pulse width of 168 ns was achieved at repetition rate of 457 kHz under pump power of 8.59 W in
a-cut Nd:LuVO4 laser with T = 8%. 相似文献
20.
Passively Q-switched output of a diode-pumped 1.34 μm Nd:GdVO4 laser was demonstrated by using Co2+:MgAl2O4(Co2+:MALO) crystal as the saturable absorber for the first time. When the transmission of output mirror is 15%, the Q-switched
pulse width is 110 ns and a corresponding average output power is 460 mW under the pump power of 9.69 W. The optical-optical
conversion efficiency is 36%. At about 330 kHz repetition rate, the single Q-switched pulse energy and the peak power are
about 1.39 μJ and 12.6 W, respectively. 相似文献