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1.
Vacuum ultraviolet luminescence of Er3+ ions in LiYF4 and BaY2F8 crystals has been investigated. It is revealed that under excitation by 193 nm radiation from an ArF excimer laser the interconfigurational 5d–4f radiative transitions in Er3+ ions are observed. It is shown that from the LiYF4:Er crystal only the spin-forbidden luminescence (λ = 165 nm) is detected, whereas both the spin-forbidden (λ = 169 nm) and spin-allowed (λ = 160.5 nm) components are observed from the BaY2F8:Er crystal. 相似文献
2.
V. I. Baryshnikov S. N. Vesnina A. A. Shestakov 《Bulletin of the Russian Academy of Sciences: Physics》2017,81(9):1115-1118
Features of the generation of laser lines upon the diode pumping of Er:BaY2F8 crystals are studied. Blue, violet, and UV laser lines are most efficiently generated via the nonlinear frequency self-addition of 541 and 553 nm lines of Er3+ radiation with the corresponding IR line of Er3+ for Er:BaY2F8 crystals pumped by a laser diode with a wavelength of 972 nm. 相似文献
3.
E. Sani A. Toncelli M. Tonelli N. Coluccelli G. Galzerano P. Laporta 《Applied physics. B, Lasers and optics》2005,81(6):847-851
A spectroscopic characterization of Tm-Ho:KYF4 crystals with different doping levels is presented. A comparative investigation based on diode-pumped 2-μm laser experiments
shows that the best trade-off in terms of cw output power characteristics and wavelength tuning ranges is obtained with 5%
Tm-0.5% Ho active crystal.
PACS 42.55Xi; 42.55Rz; 42.60Pk; 42.70Hj; 42.60Lh 相似文献
4.
M. Siebold M. Hornung S. Bock J. Hein M.C. Kaluza J. Wemans R. Uecker 《Applied physics. B, Lasers and optics》2007,89(4):543-547
An output pulse energy of 17.3 mJ has been achieved with a diode-pumped Yb:CaF2 regenerative laser amplifier. The bandwidth of the output pulse spectrum was 7.3 nm, being seeded with femtosecond pulses
stretched to 2.2 ns. In cw operation a tuning range of 80 nm has been observed. A maximum pulse energy of 44 mJ at a repetition
rate of 1 Hz has been obtained in Q-switched mode. The laser damage threshold of a Yb:CaF2 crystal has been determined at a wavelength of 1064 nm and a pulse duration of 10 ns.
PACS 42.55.Ah; 42.55.Xi; 42.70.Hj 相似文献
5.
A.E. Troshin V.E. Kisel A.S. Yasukevich N.V. Kuleshov A.A. Pavlyuk E.B. Dunina A.A. Kornienko 《Applied physics. B, Lasers and optics》2007,86(2):287-292
The polarized absorption spectra of Tm3+-doped potassium yttrium tungstate (Tm:KY(WO4)2) crystal at room temperature were measured. The emission spectrum and lifetime of the 3
F
4 excited state were determined. Using standard and modified Judd–Ofelt theories, the intensity parameters and the radiative
lifetimes were calculated and good agreement with the experimental results was obtained for both theories. Continuous-wave
laser operation in Tm:KYW crystal under laser diode pumping at 802 nm and 1750 nm was demonstrated with slope efficiency of
53% and 28% and output power of about 555 mW and 86 mW, respectively.
PACS 42.55.Xi; 42.60.Pk; 42.70.Hj 相似文献
6.
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
7.
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
8.
F. He M. Gong L. Huang Q. Liu Q. Wang X. Yan 《Applied physics. B, Lasers and optics》2007,86(3):447-450
A compact diode-side-pumped Nd:GdVO4 laser system using a folded cavity and grazing-incidence configuration is presented. The highest multimode output power obtained
was 21.8 W at 36 W of effective diode pump power. Highest optical-to-optical conversion efficiency of 61.5% was achieved at
33 W of effective diode pump power with 20.3 W of multimode output power. For single-mode TEM00 operation, an intracavity telescope was adopted for mode matching in the horizontal direction. Because of the folded cavity
and the intracavity telescope, this laser head was the most compact to our knowledge of the TEM00 grazing-incidence laser geometry. At last, an output power of 15 W was produced at 36 W of effective diode pump power. The
stable Q-switching operation was also obtained.
PACS 42.55.-f; 42.55.Xi; 42.60.Gd 相似文献
9.
We have demonstrated the continuous wave laser operation of Yb3+:YVO4. For Ti:Al2O3 laser pumping at 985 nm, a maximum slope efficiency of 41.1% and a threshold pump power of 76 mW were obtained. The maximum output power was 433 mW at a laser wavelength of 1037 nm.Using a cw diode laser around 974 nm as a pump source, a slope efficiency of 10.9% and a maximum output power of 152 mW were achieved at a laser wavelength of 1039 nm. The laser threshold pump power was 608 mW with respect to the absorbed pump power. The effective emission cross-sections for the 2F5/22F7/2 transition were determined using the Füchtbauer–Ladenburg equation. The maxima of the effective absorption and emission cross-sections were found at 984.5 nm (6.74×10-20 cm2) in -po larization and 985.5 nm (4.28×10-20 cm2) also in -p olarization. The upper laser level lifetime was measured with suppression of radiation trapping and is around 318 s. PACS 42.55.Rz; 42.55.Xi; 42.70.Hj 相似文献
10.
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
11.
We report a red laser at 671 nm generation by intracavity frequency doubling of a continuous wave (cw) laser operation of
a 1342 nm Nd:Y0.36Gd0.64VO4 laser under diode pumping into the emitting level 4
F
3/2. An GdCa4O(BO3)3 (GdCOB) crystal, cut for critical type I phase matching at room temperature is used for second harmonic generation of the
laser. At an incident pump power of 17.8 W, as high as 1.12 W of cw output power at 671 nm is achieved. The optical-to-optical
conversion efficiency is up to 6.3%, and the fluctuation of the red output power was better than 3.5% in the given 30 min. 相似文献
12.
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
13.
R. Piramidowicz R. Mahiou P. Boutinaud M. Malinowski 《Applied physics. B, Lasers and optics》2011,104(4):873-881
We report the orange-to-blue and infrared-(IR)-to-blue wavelengths upconversion luminescence in Pr3+:BaY2F8 crystals. Mechanism of the orange light upconversion into blue 3P0 state emission was confirmed to be energy transfer between two Pr3+ ions in the 1D2 state. IR-to-blue upconversion has only been observed under two different color IR pumping. The first resonant step was the
3H4→1G4 ground state absorption transition, and the second resonant transition was the excited state absorption from the 1G4 to 1I6 and 3PJ levels. A comparison of the efficiency of the IR-to-blue upconversion in several praseodymium activated host is presented
and discussed. A model of the IR pumped upconversion praseodymium blue laser is presented and the population inversion conditions
are calculated. 相似文献
14.
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
15.
We report a efficient compact red laser at 671 nm generation by intracavity frequency doubling of a continuous wave laser
operation of a diode pumped Nd:Lu0.5Y0.5VO4 laser on the 4
F
3/2-4
I
13/2 transition at 1342 nm. An LBO crystal, cut for critical type I phase matching at room temperature is used for second harmonic
generation of the laser. At an absorbed pump power of 17.8 W, as high as 2.25 W of continuous wave output power at 671 nm
is achieved with 10-mm-long LBO. The optical-to-optical conversion efficiency is up to 12.6%, and the fluctuation of the red
output power was better than 3.6% in the given 30 min. 相似文献
16.
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
17.
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
18.
V.N. Burakevich V.A. Lisinetskii A.S. Grabtchikov A.A. Demidovich V.A. Orlovich V.N. Matrosov 《Applied physics. B, Lasers and optics》2007,86(3):511-514
Continuous-wave operation of a diode-pumped Nd:YVO4 laser with self-frequency Raman conversion is demonstrated. The threshold of Raman generation was measured to be 1.3 W of
laser diode power. The maximum output power of Stokes radiation at the wavelength of 1177 nm was up to 50 mW at a laser diode
pump power of 2.3 W, corresponding to the slope efficiency of 5%. The beam quality M2 of the Stokes radiation was about 1.4. The fluctuations of the Stokes power were minimised down to 4%.
PACS 42.55.Ye; 42.60.Pk; 42.65.Dr 相似文献
19.
Performance comparisons of laser-diode pumped passively Q-switched intracavity-frequency-doubled Nd:Gd0.19Y0.81VO4 and Nd:Gd0.83Y0.17VO4 lasers at 671 nm are demonstrated for the first time to our knowledge. KTP crystal is used as the frequency doubling material
and V:YAG crystal as the saturable absorber with initial transmission of 89%. The dependences of average output power, pulse
width, pulse repetition rate, single-pulse energy and peak power on incident pump power are measured and contrasted. The experimental
results show that, Nd:Gd0.83Y0.17VO4 laser has more excellent properties than Nd:Gd0.19Y0.81VO4 laser at 671 nm. 相似文献
20.
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