共查询到20条相似文献,搜索用时 31 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.
Y. P. Huang P. Y. Chiang Y. F. Chen K. F. Huang 《Applied physics. B, Lasers and optics》2011,104(3):591-595
We originally demonstrate the use of an AlGaInAs periodic quantum-well absorber to achieve a quasi-continuous-wave (QCW) diode-pumped
passively Q-switched Nd:YVO4 laser with an intracavity optical parametric oscillator (OPO). With a diode-pumping energy of 35 mJ, the output pulse energy
and the pulse width at 1573 nm are found to be 1.58 mJ and 26 ns, respectively. The pulse repetition rate can be up to 100
Hz with the overall OPO beam quality M2 factor to be better than 1.5. 相似文献
3.
D. Gatti G. Galzerano A. Toncelli M. Tonelli P. Laporta 《Applied physics. B, Lasers and optics》2007,86(2):269-273
We report on the generation of mode-locking pulse trains with high average output powers from diode-pumped Tm-Ho:LiYF4 and Tm-Ho:BaY2F8 lasers emitting at around 2 μm. The highest output power of 365 mW was obtained with the Tm-Ho:YLF4 laser, whereas the shortest pulse duration of 120 ps and the widest tunability range of 59 nm was achieved with the Tm-Ho:BaY2F8 laser.
PACS 42.55.Xi; 42.60.Fc; 42.72.Ai; 42.55.Rz; 42.70.Hj 相似文献
4.
A Q-switched high efficient Ho:YAlO3 (Ho:YAP) laser pumped by a diode-pumped Tm:YLF laser at room-temperature is realized. The maximum output energy reaches 1.58
mJ under the repetition frequency of 5 kHz, when the incident pump power is 15.6 W. The pulse width is 22 ns. The wavelength
is 2118 nm when the transmission of output coupler is 30%. The beam quality factor is M
2 ∼ 1.39 measured by the traveling knife-edge method. 相似文献
5.
Chengqiang Lu Mali Gong Lei Huang Fahong He 《Applied physics. B, Lasers and optics》2007,89(2-3):285-289
A high-power high-repetition-rate acousto-optically Q-switched 1342 nm laser with double Nd:YVO4 crystals pumped by fiber-coupled laser diodes is presented. The highest output power of 13.7 W was achieved with a total
of 42 W pumping power in cw operation, the slope efficiency was measured as 36%, and the optical efficiency was better than
32%. In Q-switchedoperation, the highest pulse repetition rate of 100 kHz was obtained. At 50 kHz repetition rate, the laser
exported 11.2 W average output power, with 60 ns average pulse width, ∼5% width stability (RMS) and ∼8% peak-power stability
(RMS). At 10 kHz repetition rate, the highest average output power was measured as 6.3 W, single pulse energy was calculated
as 0.63 mJ, with pulse width of 19 ns and peak-power higher than 30 kW. Combining the experimental results, we analyze and
discuss some problems concerning Nd:YVO4 crystal working at 1,342 nm wavelength.
PACS 42.55.-f; 42.55.Xi; 42.60.Gd 相似文献
6.
We report what we believe to be the first Yb:SrF2 regenerative femtosecond amplifier. The regenerative amplifier produces 325-fs pulses at 100-Hz repetition rate with an energy
before compression of 1.4 mJ. The interest of Yb:SrF2 in such regenerative amplifiers and its complementarity to its well-known isotype Yb:CaF2 is also discussed. 相似文献
7.
N.A. Tolstik A.E. Troshin S.V. Kurilchik V.E. Kisel N.V. Kuleshov V.N. Matrosov T.A. Matrosova M.I. Kupchenko 《Applied physics. B, Lasers and optics》2007,86(2):275-278
We report on the spectroscopy and, for the first time to our knowledge, continuous-wave and Q-switched diode-pumped laser
operation of Er,Yb:YVO4 crystal. Absorption and emission spectra of the crystal were determined. Lifetimes of Er3+
4
I
13/2 and 4
I
11/2 levels that define laser performance of the crystal were measured and parameters of energy transfer between Yb3+ and Er3+ ions were estimated. cw output power of 115 mW with slope efficiency of 5.4% was achieved at 1604 nm. In the Q-switched mode
an average output power of 81 mW with slope efficiency of 3.5% and pulse duration of 150 ns was obtained. In quasi-cw regime
maximal peak power of 610 mW with slope efficiency of 6.7% was demonstrated.
PACS 42.55.Xi; 42.60.Gd; 42.70.Hj 相似文献
8.
Hu Pan Renpeng Yan Xin Fa Xin Yu Yufei Ma Rongwei Fan Xudong Li Deying Chen Zhongxiang Zhou 《Optical Review》2016,23(3):386-390
A compact high-peak-power, high-repetition-rate burst mode laser is achieved by an acousto-optical Q-switched Nd:YVO4 1064 nm laser directly pumped at 878.6 nm. Pulse trains with 10–100 pulses are obtained using acousto-optical Q-switch at repetition rates of 10–100 kHz under a pulsed pumping with a 1 ms duration. At the maximum pump energy of 108.5 mJ, the pulse energy of 10 kHz burst mode laser reaches 44 mJ corresponding to a single pulse energy of 4.4 mJ and an optical-to-optical efficiency of 40.5 %.The maximum peak power of ~468.1 kW at 10 kHz is obtained with a pulse width of 9.4 ns. The beam quality factor is measured to be M 2 ~1.5 and the pulse jitter is estimated to be less than 1 % in both amplitude and time region. 相似文献
9.
Xudong Li Guichuan Xu Renpeng Yan Zhixiang Liu Xiaolin Wen Wentao Wu Yufei Ma Fang Peng Qingli Zhang Renqin Dou Zhongxiang Zhou 《Journal of Russian Laser Research》2018,39(6):613-619
We demonstrate for the first time a Cr4+:YAG passively Q-switched 1066 nm pulse-burst laser under 879 nm direct pump with a novel Nd:Gd0.69Y0.3NbO4 crystal. The output laser characteristics with different pump repetition rates and different Cr4+:YAG initial transmission are studied. Without the Cr4+:YAG, we obtain a maximum output energy of 2.55 mJ at an absorbed pump energy of 5.79 mJ with the highest 48% slope efficiency. The pulse-burst laser contains a maximum of 7 pulses for a Cr4+:YAG initial transmission of 55% and a pump repetition rate of 1 kHz. The single-pulse energy and narrowest pulse width reach 160 μJ and 5.5 ns at 38.2 kHz, with a peak power of 32 kW. 相似文献
10.
The crystal of Nd3+:Sr6YSc(BO3)6 with dimensions of O 19×42 mm3 was grown by the Czochralski method. It’s spectral and laser properties have been investigated. The absorption cross section
is 1.47×10-20 cm2 with a FWHM 12.0 nm at 807 nm, the emission cross section is 1.57×10-19 cm2 at 1060 nm, and the fluorescence lifetime is 76 μs at room temperature. The maximum laser output is 25.7 mJ at 1.06 μm pumped
by a single Xenon flash lamp and the overall and average slope efficiencies are 0.12% and 0.09%, respectively. The laser energy
threshold value is 1.28 J.
PACS 42.55.Rz; 42.70.Hj; 78.20.-e 相似文献
11.
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
12.
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
13.
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
14.
J. Chen H. Mizuno H. Kawano A. Miyawaki K. Midorikawa 《Applied physics. B, Lasers and optics》2006,85(1):45-48
We experimentally demonstrated two-photon pumping of random lasers using picosecond and nanosecond pump lasers. The picosecond laser pumping experiment was performed with 400 ps laser pulses at 770 nm, and the gain media was a Coumarin 480D dye solution doped with TiO2 nanoparticles. Onset of laser action was observed at a pump laser pulse energy below 500 μJ. The nanosecond laser pumping experiment was performed with 7 ns laser pulses at 1064 nm, and the gain media was a Rhodamine 640 dye solution doped with TiO2 nanoparticles. Onset of laser action was observed at a pump laser energy ∼18 mJ. Our results suggest that there exists an optimal pulse duration of the pumping laser in two-photon pumped random lasing that leads to minimum photodamage of the gain media and still keeps a high pumping efficiency. PACS 33.50.Dq; 42.55.Mv; 42.55.Zz 相似文献
15.
Y. Cheng H.J. Zhang Y.G. Yu J.Y. Wang X.T. Tao J.H. Liu V. Petrov Z.C. Ling H.R. Xia M.H. Jiang 《Applied physics. B, Lasers and optics》2007,86(4):681-685
A laser crystal of Yb:LuVO4 with high optical quality was grown by the Czochralski technique. Its thermal properties including specific heat, thermal
expansion coefficients, and thermal conductivities along the a- and c-axis have been measured for the first time. Continuous-wave
laser output up to 3.5 W at 1031 nm was obtained at room temperature through end-pumping by a high-power diode laser. The
corresponding optical conversion efficiency was 43% and the slope efficiency was 72%.
PACS 42.55.Xi; 66.60.+a 相似文献
16.
This article presents the results of theoretical analysis and experimental studies on passively Q-switched flash-lamp pumped
Er: Glass laser employing Co2+:MgAl2O4 saturable absorber. Using two methodologies derived from basic rate equations, laser performance was optimized in terms of
the output energy, pulse width and efficiency. The efficacy of these approaches is compared with each other and these results
matched well when evaluated for a given system. Theoretical results have been compared with the actual experimental results.
For optimum combination of output mirror reflectivity (R=70%) and initial transmission of saturable absorber (T0=83%), single pulse energy of 10.77 mJ, 35.6 ns pulse width was obtained with a Q-switching efficiency of 12.7%. The experimental
results match well with the theoretical analysis. To the best of our knowledge, this is the first attempt to analyse passively
Q-switched Er:Glass laser by Co2+:MgAl2O4 from both these approaches.
PACS 42.60.Gd, 42.55.Rz 相似文献
17.
Al<Subscript>2</Subscript>O<Subscript>3</Subscript> plasma production during pulsed laser deposition
F. Caridi L. Torrisi A. M. Mezzasalma G. Mondio A. Borrielli 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2009,54(2):467-472
A Nd:YAG laser operating in second harmonic (532 nm), 3 ns pulse duration, 150 mJ pulse energy, and 10 Hz repetition rate,
is employed to irradiate Al2O3 target placed in high vacuum. The produced plasma is investigated by an ion collector used in time-of-flight configuration
and by a mass quadrupole spectrometer, in order to determine the equivalent plasma temperature and the atomic and molecular
composition. Pulsed laser deposition technique has been used to produce thin films on different substrates placed close to
the target. Different surface analyses, such as energy dispersive X-ray fluorescence (EDXRF), X-ray photoelectron spectroscopy
(XPS) and surface profilometry are employed to characterize the produced films. Measurements of ablation yield, plasma equivalent
temperature, acceleration voltage and characterization of grown thin films are presented and discussed. 相似文献
18.
Passive mode locking of the new crystal Yb3+:Sc2SiO5 (Yb:SSO) laser at 1040 nm in a w-type cavity is reported for the first time to our knowledge. The laser operated at a repetition
frequency of 94 MHz. A pulse duration of 4.2 ps was produced with an average power of 543 mW and a highest pulse energy of
5.7 nJ, corresponding it’s maximum peak power can reach to 1.4 kW. 相似文献
19.
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
20.
We present the spectroscopic properties and room temperature of a cw tunable laser operation with Yb3+ doped CaF2 single crystals grown in our laboratory. A laser slope efficiency of 50% with respect to the absorbed 920 nm pump power was obtained, and the laser wavelength could be tuned between 1000 and 1060 nm. PACS 42.55R; 42.70An erratum to this article can be found at 相似文献