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1.
A diode-end-pumped high repetition rate, high peak power acousto-optical (AO) Q-switched 946 nm Nd:YAG laser was demonstrated
in this paper. In our experiments, a 20 mm miniature acousto-optical Q-switch was employed in a 45 mm linear laser cavity
for generating the short laser pulse. At a repetition rate of 10 kHz, a maximum average output power of 2.9 W was achieved
with a pulse width of 24.4 ns, giving a peak power of 11.9 kW. To the best of our knowledge, this is the highest peak power
946 nm Nd:YAG laser at high repetition rate operation. Moreover, pulse train with good stability was also obtained at the
repetition rate of 50 kHz. At an incident pump power of 22.3 W, up to an average output power of 3.5 W pulsed 946 nm laser
was generated at 50 kHz with a pulse width of 69 ns, corresponding to an optical conversion efficiency of 15.7% and an average
slope efficiency of 24.1%, respectively. 相似文献
2.
Efficient intra-cavity second harmonic generation by a diode-pumped actively Q-switched Nd:YAG laser
A compact and efficient intra-cavity doubled, actively Q-switched diode-pumped Nd:YAG laser has been developed. It generates as much as 1.55 W at 532 nm, with pulses of 400 ns at a repetition rate of 15 kHz, with an overall optical-to-optical efficiency of 15.5%. A beam quality factor M2 ≈ 2.35 has been measured at this power level. 相似文献
3.
J.C. Diettrich I.T. McKinnie D.M. Warrington 《Applied physics. B, Lasers and optics》1999,69(3):203-206
We have developed a gain-switched room-temperature Cr:forsterite laser operating at repetition rates of between 1 and 34 kHz,
and pumped by a continuous wave, Q-switched Nd:YAG laser. With optimised output coupling, an output pulse energy of 52 μJ
was measured at 1.5 kHz repetition rate, corresponding to 11% efficiency and 13% slope efficiency. Threshold pulse energy
was 53 μJ. Output power of 370 mW was obtained at 10 kHz repetition rate and 4.4 W pump power. Water cooling was not required
for repetition rates up to 10 kHz. In a tunable, folded resonator, the Cr:forsterite wavelength tuned between 1173 and 1338 nm.
This laser operated with maximum pulse energy of 34 μJ, efficiency of 13%, and power of 307 mW. The laser output was close
to diffraction-limited with M2 of 1.2.
Received: 6 January 1999 / Published online: 29 July 1999 相似文献
4.
5.
The operation of an all solid-state pulsed Nd:KGW Raman laser pumped by compact passively Q-switched Nd:YAG/Cr:YAG laser is
demonstrated. The first-Stokes radiation of stimulated Nd:KGW Raman scattering at the 1178 nm is generated. The average output
power of 336 mW at Stokes wavelength was obtained under the laser diode pump power of 5.74 W. The corresponding optical efficiency
from the diode light to the Raman output is 9.85%. The pulse width of 1.65 ns and a pulse repetition rate of 10 kHz were also
obtained. 相似文献
6.
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
7.
High-power high-stability Q-switched green laser with intracavity frequency doubling of diode-pumped composite ceramic Nd:YAG laser 下载免费PDF全文
We successfully obtain high-average-power high-stability Q-switched green laser based on diode-side-pumped composite ceramic Nd:YAG in a straight plano-concave cavity. The temperature distribution in composite ceramic Nd:YAG crystal is numerically analyzed and compared with that of conventional Nd:YAG crystal. By use of a composite ceramic Nd:YAG rod and a type-II high gray track resistance KTP (HGTR-KTP) crystal, a green laser with an average output power of 165 W is obtained at a repetition rate of 25 kHz, with a diode-to-green optical conversion of 14.68%, and a pulse width of 162 ns. To the best of our knowledge, both the output power and optical-to-optical efficiency are the highest values for green laser systems with intracavity frequency doubling of this novel composite ceramic Nd:YAG laser to date. The power fluctuation at around 160 W is lower than 0.3% in 2.5 hours. 相似文献
8.
Jieguang Miao Baoshan Wang Jiying Peng Huiming Tan Huikun Bian 《Optics & Laser Technology》2008,40(1):137-141
Diffusion bonded Nd:YAG/Cr:YAG composite laser crystal has been employed to perform a compact diode-pumped passively Q-switched laser. At the incident pump power of 3.3 W and pulse repetition rate of 16.3 kHz, the maximum average output of 592 mW has been obtained, corresponding to an optical-to-optical conversion efficiency of 18%. Stable passively Q-switched operation with peak power of 6.5 kW and pulse duration of 6 ns was also achieved. It has been experimentally revealed that Nd:host/Cr:YAG composite structure is a promising material for compact cost-effective Q-switched laser sources with high-peak power and short pulse duration. In addition, thermal lens effect (TLE) in the active medium and its impact on the Q-switched laser performance have been analyzed. 相似文献
9.
An efficient compact diode-pumped acousto-optic actively Q-switched Nd:YAG ceramic laser operating at 1319 nm was demonstrated.
At an incident pump power of 23.7 W, an average output power of 4.8 W at a pulse repetition frequency of 30 kHz was obtained.
The corresponding optical-to-optical conversion efficiency was 20.3%. A maximum single pulse energy of 316 μJ with a pulse
duration of 78.5 ns was obtained at an incident pump power of 19.4 W and a pulse repetition frequency of 10 kHz. 相似文献
10.
11.
A Compact 532-nm Source by Frequency Doubling of a Diode Stack End-Pumped Nd:YAG Slab Laser 下载免费PDF全文
ZHANG Heng-Li LIU Xiao-Meng LI Dai-Jun SHI Peng Alex Schell Claus Rüdige Haas Du Ke-Ming 《中国物理快报》2007,24(10):2846-2848
A near-diffraction-limited green source is generated at 1 kHz repetition rate by frequency doubling of a diode stack end-pumped electro-optically Q-switched Nd:YAG slab laser. We obtain 9. 7mJ green light with pulse width of 12.2ns at a repetition rates of i kHz. The pump to green optical conversion efficiency is 12.9%. The energy pulse stability at 532nm is about 0.8%. 相似文献
12.
Y. Tang X. Y. Zhang Q. P. Wang W. T. Wang Z. G. Wu L. Li X. L. Zhang Y. G. Zhang Z. J. Liu X. H. Chen S. Z. Fan 《Laser Physics》2011,21(4):695-699
A high-efficiency diode-pumped acousto-optically (AO) Q-switched ceramic Nd:YAG (cNd:YAG) laser operating at 1123 nm is demonstrated for the first time. With an incident pump power of 17.11 W and a pulse repetition rate of 30 kHz, an average output power of 5.86 W is obtained. The optical-to-optical conversion efficiency is 34.2% and the slope efficiency is 39.1%. 相似文献
13.
A comparative study of Nd:KGW and Nd:YAG laser crystals pumped by flashlamp has been conducted near 1.3 μm with output energy
up to 1 J and at a repetition rate up to 50 Hz. An average power of 23 W for KGW in free-running mode was achieved with a
total efficiency better than 2.8 % for the Nd:KGW and 1.8 % for the Nd:YAG.
Received: 9 December 1996 / Revised version: 10 February 1997 相似文献
14.
15.
报道了用两个1.5W激光二极管偏振耦合端面泵浦的声光调Q内腔倍频Nd:YAG激光器。输出532nm绿光重复频率1KHz时,最大峰值功率为2.23KW,最窄脉宽为18ns,平均功率40mW。最高重复频率30KHz。重复频率15kHZ时,最高平均率128mW。对声光调Q内倍频Nd:YAG激光器的动态特性进行了理论分析及计算。 相似文献
16.
A. Agnesi P. Dallocchio F. Pirzio G. Reali 《Applied physics. B, Lasers and optics》2010,98(4):737-741
A single-axial-mode, passively Q-switched (PQS) diode-pumped Nd:YAG laser, generating a diffraction-limited beam train of
≈40–60 μJ, ∼500-ps pulses with adjustable repetition rate in the range 1–10 kHz, was efficiently amplified by a single side-pumped
Nd:YVO4 bounce amplifier. After double-pass amplification, ≈1-MW pulse peak power with 577-ps duration and 545-μJ energy was achieved,
still maintaining diffraction-limited beam performance. The average output power was 5.45 W at 10 kHz, corresponding to 13%
extraction efficiency. The high brightness of this laser system seems ideal for nonlinear optics and some particular laser
processing applications. 相似文献
17.
F. Chen X. Yu J. Guo L. H. Guo G. L. Yang J. J. Xie L. M. Zhang Y. M. Geng S. M. Li D. J. Li C. L. Shao F. J. Meng C. S. Zhang R. P. Yan 《Laser Physics》2012,22(1):81-86
A diode-pumped acousto-optically (AO) Q-switched high-repetition-rate Nd:YAG lasers at 946 and 473 nm by intracavity frequency-doubling were reported in this paper. Using a compact V-type laser cavity, a maximum average output power of 4.5 W 946 nm laser was obtained at an operating repetition rate of 10 kHz, corresponding to an optical conversion efficiency of 10.5% and a slope efficiency of 15.6%. With a BiBO crystal as the intracavity frequency-doubler, 1.35 W 473 nm pulsed laser was achieved at 10 kHz. The peak power of the Q-switched blue pulse was up to 4.1 kW, with a pulse width of 33.1 ns. Then, the long-term power instability was less than 1%. Moreover, stable pulsed operation of 946 nm and 473 nm lasers can even reach 50 kHz. 相似文献
18.
从LD端面抽运固体激光器的激光阈值公式出发,建立了双波长激光同时振荡的阈值条件,理论计算了腔镜对于两个波长的透过率关系,实现了LD端面抽运Nd:YAG 1319nm/1338nm双波长激光连续和准连续输出.双波长激光连续输出功率可达6W,斜效率为30%;准连续输出功率在重复频率50kHz时可达4.75W,斜效率为24.73%,脉冲宽度为55.05ns;腔内插入布儒斯特片,在重复频率为50kHz时,双波长激光准连续线偏振输出功率可达2.22W,不稳定性小于0.52%,M2
关键词:
端泵Nd:YAG激光器
1319nm/1338nm双波长
声光调Q
太赫兹波 相似文献
19.
从LD端面抽运固体激光器的激光阈值公式出发,建立了双波长激光同时振荡的阈值条件,理论计算了腔镜对于两个波长的透过率关系,实现了LD端面抽运Nd:YAG 1319nm/1338nm双波长激光连续和准连续输出.双波长激光连续输出功率可达6W,斜效率为30%;准连续输出功率在重复频率50kHz时可达4.75W,斜效率为24.73%,脉冲宽度为55.05ns;腔内插入布儒斯特片,在重复频率为50kHz时,双波长激光准连续线偏振输出功率可达2.22W,不稳定性小于0.52%,M2 相似文献
20.
We analyzed a linear cavity for intracavity frequency doubling of a diode-pumped acousto-optic Q-switched Nd:YAG rod laser, and showed that a green laser beam with a short pulse width can be generated efficiently. A green laser output power of 73 W corresponding to the 83.9% of maximum IR output power was obtained with a 40 ns pulse width at a 10 kHz repetition rate. A green output power of 40 W with a 35 ns pulse width was measured at a 5 kHz repetition rate. Minimum laser pulse width of approximately 32 ns was obtained around 1 kHz repetition rate for both green and IR laser beams. 相似文献