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1.
Ultrahigh-efficiency TEM00 operation is demonstrated in a diode-pumped Nd:YVO4 laser in a bounce amplifier geometry using a specially designed astigmatically optimised cavity configuration. Optical efficiency
>68% is demonstrated and up to 27.1 W of output power for multimode operation. For single-mode TEM00 operation, an output power of 23.1 W for 39.5 W of diode pumping was produced with beam propagation parameters of Mx
2=1.3 and My
2=1.1.
Received: 10 October 2002 / Revised version: 9 December 2002 / Published online: 19 March 2003
RID="*"
ID="*"Corresponding author. Fax: +44-20/7594-7744, E-mail: a.minassian@ic.ac.uk 相似文献
2.
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
3.
Thermal effect of laser crystal is a very important factor for solid lasers. The most of heat is generated from the quantum
loss between pump light and lasing light. If a longer wavelength of pump light is adopted, quantum loss and quantum loss efficiency
can be reduced and improved, respectively. In this paper, a Nd:YVO4 laser end-pumped by 887 nm LD is reported. Output power of 25 W is obtained from a single Nd:YVO4, when the crystal absorbs pump light power of 38 W. The corresponding opto-optic conversion efficiency is up to 65.7%. When
30.7 W pump light is absorbed in the crystal, 19.4 W TEM00 is obtained with M
x
2 = 1.30, M
y
2 = 1.26 and opto-optic conversion efficiency of 63.2%. The laser can work at the Q-switched mode. The uniform pulses are generated
at high repetition of 100 kHz. And the conditions of pulse stability are analyzed in this paper. 相似文献
4.
We report on a passively mode-locked TEM00 Nd:YAG oscillator with the beam quality at M
2 = 1.1 by a semiconductor saturable absorber mirror under 885 nm laser diode direct pumping for the first time. A maximum
average output power of 17 W at a repetition rate of 80 MHz with 39 ps pulse width was obtained under the absorbed pump power
of 38 W, corresponding to an optical-optical efficiency of 44% and the slope efficiency of 69%, respectively. 相似文献
5.
An end-pumped Nd:YVO4 laser fiber-coupled diode was designed. A maximum output power of 4.74 W TEM00 mode CW laser was obtained for a pump power of 10.5 W. The optical efficiency and slope efficiency were measured as 45.1
and 57.8% at 1064 nm, respectively. In Q-switching operation, 4.45 W average power at a pulse repletion rate of 5 kHz was
produced, with a stability of pulse peak value <2%. 相似文献
6.
We describe the output performances of the 928 nm 4
F
3/2 → 4
I
9/2 transition in Nd:CLNGG under diode-laser pumping. An end-pumped Nd:CLNGG crystal yielded 1.3 W of continuous-wave output
power for 17.8 W of absorbed pump power. The slope efficiency with respect to the absorbed pump power was 11.2%. Furthermore,
with 17.8 W of diode pump power and the frequency-doubling crystal LiB3O5 (LBO), a maximum output power of 260 mW in the blue spectral range at 464 nm has been achieved. The blue output power stability
over 4 h is better than 3.2%. 相似文献
7.
J. Ma L. Guo B. Xiong X. Yan S. Zhang R. Chen W. Zhao X. Lin J. Li Q. Duanmu 《Laser Physics》2010,20(6):1350-1353
High efficiency, TEM00 mode, high repetition rate laser pumped by 887 nm is reported. 20.1 W output laser emitting at 1064 nm is achieved in a 0.3
at % Nd-doped Nd:YVO4, which absorbs pumping light of 30.7 W at 887 nm. The opto-optic efficiency and the slope efficiency are 65.5 and 88.5%,
respectively. The stable Q-switching operation worked well at 100 kHz and the beam quality is near diffraction-limit with
M2 factor measured as M2 ≈ 1.2. And the pulse waveform is analyzed in this paper. 相似文献
8.
J.C. Bermudez Gutierrez M.J. Damzen V.J. Pinto-Robledo A.V. Kir’yanov J.J. Soto-Bernal 《Applied physics. B, Lasers and optics》2003,76(1):13-16
The analysis of compact CW diode-side-pumped grazing-incidence-geometry Nd:YVO4 laser designs is presented. An output power of 5 W (λ=1064 nm) was produced at 17 W of diode pump (conversion efficiency
of 30%) in single transverse TEM00 mode operation at high laser beam quality (Mx
2≈1.05 and My
2≈1.01). The resonator geometry was analyzed by applying generalized 4×4 matrix modeling of the spatial mode size, including
the impact on the laser operation of cavity astigmatism and a thermal lens in the laser slab. The simplicity and compactness
of the laser cavities allow their use for technological applications.
Received: 31 July 2002 / Published online: 22 January 2003
RID="*"
ID="*"Corresponding author. Fax: +44-20/7594-7744, E-mail: m.damzen@ic.ac.uk 相似文献
9.
A beam-shaping diode end-pumped TEM00 mode CW Nd:YVO4 laser is presented. A special beam-shaping element made up of isosceles right-angled prism pieces is adopted to realize beam
symmetric. Two cylinder lenses are used to couple the shaped beam into a 3 × 3 × 9 mm Nd:YVO4 crystal with 0.3 at % neodymium doping. By using this laser system, we have achieved 6.1 W CW laser operated in single transverse
mode at 1064 nm with 95.2% reshaping efficiency and 25.6% optical-optical conversion efficiency. 相似文献
10.
Y. L. Li 《Laser Physics》2011,21(11):1855-1858
We report an efficient laser emission on the 1064 nm 4
F
3/2 to 4
I
11/2 transition in mixed vanadate crystal Nd:Y0.36Gd0.64VO4 under the pump with diode laser at 880 nm. Continuous wave (CW) 10.7 W output power at 1064 nm is obtained under 17.8 W of
incident pump power; the slope efficiency with respect to the incident pump power was 71.2%. Moreover, intracavity frequency
doubling with LiB3O5 (LBO) nonlinear crystal yielded 4.6 W of green light at 532 nm. An optical-to-optical efficiency with respect to the incident
pump power was 25.8%. 相似文献
11.
We report the continuous-wave (CW) operation of a room-temperature a-cut Ho:YAP laser resonantly end-pumped by a diode-pumped Tm:YLF laser at 1.91 μm. A maximum CW output power of 14.6 W at
2118.7 nm for a-oriented Ho:YAP was obtained, corresponding to the slope efficiency of 69.35% and optical-to-optical conversion efficiency
of 63.04% with respect to absorbed pump power. The laser operated at a single mode (TEM00) with the beam quality factor of M
2 ∼ 1.51. 相似文献
12.
We report a continuous-wave (CW) coherent green radiation at 532 nm by intracavity frequency doubling generation of 1064 nm
Nd:Gd0.18Y0.82VO4 laser. With incident pump power of 18.2 W, output power of 1.08 W at 532 nm has been obtained using a 5 mm-long KTP crystal.
The optical conversion efficiency was up to 5.9%. At the output power level of 1.08 W, the output stability is better than
5%. The beam quality M2 values were equal to 1.26 and 1.12 in X and Y directions, respectively. 相似文献
13.
L. Sun H. J. Yu L. Zhang L. Guo J. Zhang Z. Y. Dong B. Xiong W. Hou X. C. Lin J. M. Li 《Laser Physics》2011,21(10):1765-1768
We report on an 880 nm LD pumped passive mode-locked TEM00 Nd:YVO4 laser based on a semiconductor saturable absorber mirror (SESAM), with a high optical-to-optical conversion efficiency of
67.3%, and a slope efficiency of 71%. When the absorbed pump power was 11 W, 7.4 W average output power of 1064 nm continuous-wave
mode-locked laser was achieved. To our knowledge, this is the highest optical-to-optical conversion efficiency among all the
published reports of 880 nm LD pumped SESAM passive mode-locked lasers. The repetition rate of mode-locked pulse was 80 MHz
with 26 ps pulse width. The maximum pulse energy and peak power were 92.5 nJ and 3.6 kW, respectively. 相似文献
14.
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
15.
W. Liang X. H. Zhang J. Xia G. Y. Jin L. J. Xu G. C. Sun Z. M. Zhao 《Laser Physics》2011,21(5):861-863
A high-power diode -pumped Nd3+:YAl3(BO3)4 (Nd:YAB) laser emitting at 1338 nm is described. At the incident pump power of 9.8 W, as high as 734 mW of continuous-wave
(CW) output power at 1338 nm is achieved. The slope efficiency with respect to the incident pump power was 9.0%. To the best
of our knowledge, this is the first demonstration of such a laser system. The output power stability over 60 min is better
than 2.6%. The laser beam quality M
2 factor is 1.21. 相似文献
16.
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
17.
A diode-pumped Nd3+:YAlO3 (Nd:YAP) laser emitting at 1339 nm is described. At the incident pump power of 17.8 W, as high as 3.4 W of continuous-wave
(CW) output power at 1339 nm is achieved. The slope efficiency with respect to the incident pump power was 23.6%. The output
power stability over 60 min is better than 3.5%. The laser beam quality M
2 factor is 1.33. 相似文献
18.
a high power dual-end-pumped Nd:YVO4 laser with adaptive compensation of thermal lensing effect by adjusting HR mirror along the optical axis was proposed. In
Q-switching operation at 70 kHz, the laser worked at different pump power (from 90 W to 70 W) with stable beam quality (M
2 ∼ 1.15) and high output power (from 39 to 28.4 W), corresponding to the absorbed-output conversion efficiency of 55%. In
the meantime, the pulse duration was increased from 24 to 31.7 ns. At various repetition rate from 60 to 100 kHz, the beam
quality factors were all measured less than 1.2. 相似文献
19.
In this paper, we report a 22.7 W continuous wave (CW) diode-pumped cryogenic Ho( at %), Tm(3 at %):GdVO4 laser. The pumping sources of Ho,Tm:GdVO4 laser are two fiber-coupled laser diodes with fiber core diameter of 0.4 mm, both of them can supply 42 W power laser operating
near 802 nm. For input pump power of 64.7 W at 802.5 nm, the output power of 22.7 W in CW operation, optical-to-optical conversion
efficiency of 35.1% at 2.05 μm has been attained. The M
2 factor was found to be 2.0 under an output power of 16.5 W. 相似文献
20.
LD side-pumped 41 W high beam quality acousto-optical Q-switched single-rod Nd:YAG laser 总被引:2,自引:0,他引:2
We report a LD side-pumped high beam quality (M
x
2 = 1.20 and M
y
2 = 1.19) acousto-optic (AO) Q-switched single-rod Nd:YAG laser with a TEM00-mode dynamic stable cavity. At the pump power of 600 W, 41 W TEM00-mode 1064 nm laser was achieved with electro-optical conversion efficiency of 7%. The repetition rate and pulse width were
30 kHz and 102 ns, respectively with pulse energy of 1.4 mJ and peak power of 13 kW. Up to 24 W of 532 nm green laser was
generated by external frequency doubling, corresponding to 59% optical conversion efficiency. 相似文献