共查询到17条相似文献,搜索用时 158 毫秒
1.
An All-Solid-State Tunable Dual-Wavelength Ti:Sapphire Laser with Quasi-Continuous-Wave Outputs
下载免费PDF全文
![点击此处可从《中国物理快报》网站下载免费的PDF全文](/ch/ext_images/free.gif)
A high power dual-wavelength Ti:sapphire laser system with wide turning range and high efficiency is described, which consists of two prism-dispersed resonators pumped by an a11-solid-state frequency-doubled Nd:YAG laser. Tunable dual-wavelength outputs, with one wavelength range from 750nm to 795nm and the other from 80Ohm to 850nm, have been demonstrated. With a pump power of 23 W at 532nm, a repetition rate of 6.5kHz and a pulse width of 67.6ns, the maximum dual-wavelength output power of 5.6 W at 785.3nm and 812.1 run, with a pulse width of 17.2ns and a line width of 2nm, has been achieved, leading to an optical-to-optical conversion efficiency of 24.4%. 相似文献
2.
High power high beam quality diode-pumped 1319-nm Nd:YAG oscillator-amplifier laser system
下载免费PDF全文
![点击此处可从《中国物理 B》网站下载免费的PDF全文](/ch/ext_images/free.gif)
This paper demonstrated a high power and high beam quality
diode-pumped 1319-nm Nd:YAG master oscillator-power amplifier laser
system. A thermally near-unstable resonator with four-rod
birefringence compensation flat--flat cavity was adopted as the
master oscillator. A solid etalon was inserted in the unidirectional
ring resonator to compress the laser linewidth. Under a repetition
rate of 500~Hz and pulse width of 160~\mus, the master oscillator
delivers an average output power of 16.8~W at 1319~nm with linear
polarisation, beam quality factor M^{2} = 1.16 and linewidth of
3.2~GHz. A double-pass power amplifier with two amplifier stages was
employed for higher power scaling and the output power was amplified
to be 25.9~W with M^{2} = 1.43. 相似文献
3.
Nonlinear Polarization Rotation-Based Mode-Locked Erbium-Doped Fiber Laser with Three Switchable Operation States
下载免费PDF全文
![点击此处可从《中国物理快报》网站下载免费的PDF全文](/ch/ext_images/free.gif)
A simple mode-locked erbium-doped fiber laser (EDFL) with three switchable operation states is proposed and demonstrated based on nonlinear polarization rotation. The EDFL generates a stable square pulse at a third harmonic pulse repetition rate of 87kHz as the 1480 nm pump power increases from the threshold of 17.5 m W to 34.3mW. The square pulse duration increases from 105 ns to 245ns as the pump power increases within this region. The pulse operation switches to the second operation state as the pump power is varied from 48.2mW to l16.Tm W. The laser operates at a fundamental repetition rate of 29 kHz with a fixed pulse width of 8.5 μs within the pump power region. At a pump power of ll6.TmW, the average output power is 3.84mW, which corresponds to the pulse energy of 131.5 ng. When the pump power continues to increase, the pulse train experiences unstable oscillation before it reaches the third stable operation state within a pump power region of 138.9 m W to 145.0 m W. Within this region, the EDFL produces a fixed pulse width of 2.8 μs and a harmonic pulse repetition rate of 58 kHz. 相似文献
4.
Efficient collinear frequency tripling of femtosecond laser with compensation of group velocity delay
下载免费PDF全文
![点击此处可从《中国物理 B》网站下载免费的PDF全文](/ch/ext_images/free.gif)
This paper demonstrates an approach that negative uniaxial crystal
has a relative anomalous dispersion effect which can compensate group
velocity delay, and applies this approach to nonlinear frequency
conversion of an ultrafast laser field. High efficiency of the third
harmonic generation is experimentally fulfilled by adopting a
collinear configuration of doubing-compensation-tripling system.
Through finely adjusting the incident angle and optical axis direction
of the compensation plate, it obtains ultraviolet (UV) output energy of
0.32~mJ centered at 270~nm with spectral bandwidth of 2~nm when
input beam at 800~nm was 70~fs pulse duration and 6~mJ pulse energy
which was extracted from Ti:sapphire laser system by a diaphragm,
corresponding to an 800-to-270~nm conversion efficiency of 5.3%
and a factor-of-1.6 improvement in the third harmonic generation of
UV band in comparison with a general conventional configuration.
Furthermore, when the full energy of 18~mJ from a Ti:sapphire laser system
was used and optimized, the UV emission could reach 0.83~mJ. 相似文献
5.
We present a near diffraction-limited 1 064-nm Nd:YAG rod laser with output power of 82.3 W(M~2≈1.38). The power fluctuation over two hours is better than±1.1%.Pulsed 1064-nm laser with an average power of 66.6 W and pulse width of 46 ns are achieved when the laser is Q-switched at a repetition rate of 10 kHz.The short pulse duration stems from the short cavity as well as the high-gain laser modules. Using intracavity-frequency-doubling,a 35.0-W near diffraction-limited 532-nm green laser(M~2≈1.32) is achieved with a pulse width of 43 ns. 相似文献
6.
A Q-switched ytterbium-doped fiber laser(YDFL)is proposed and demonstrated using a newly developed multi-walled carbon nanotubes polyethylene oxide(MWCNTs-PEO)film as a passive saturable absorber(SA).The saturable absorber is prepared by mixing the MWCNTs homogeneous solution into a dilute PEO polymer solution before it is left to dry at room temperature to produce thin film.Then the film is sandwiched between two FC/PC fiber connectors and integrated into the laser cavity for Q-switching pulse generation.The laser generates a stable pulse operating at wavelength of 1060.2 nm with a threshold pump power of 53.43 mW.The YDFL generates a stable pulse train with repetition rates ranging from7.92 to 24.27 kHz by varying 980-nm pump power from 53.42 to 65.72 mW.At 59.55-mW pump power,the lowest pulse width and the highest pulse energy are obtained at 12.18μs and 143.5 nJ,respectively. 相似文献
7.
A Q-switched ytterbium-doped fiber laser (YDFL) is proposed and demonstrated using a newly developed multi-walled carbon nanotubes polyethylene oxide (MWCNTs-PEO) film as a passive saturable absorber (SA). The saturable absorber is prepared by mixing the MWCNTs homogeneous solution into a dilute PEO polymer solution before it is left to dry at room temperature to produce thin film. Then the film is sandwiched between two FC/PC fiber connectors and integrated into the laser cavity for Q-switching pulse generation. The laser generates a stable pulse operating at wavelength of 1060.2 nm with a threshold pump power of 53.43 mW. The YDFL generates a stable pulse train with repetition rates ranging from 7.92 to 24.27 kHz by varying 980-nm pump power from 53.42 to 65.72 mW. At 59.55-mW pump power, the lowest pulse width and the highest pulse energy are obtained at 12.18 μs and 143.5 n J, respectively. 相似文献
8.
Xin Ding Yue Zou Lei Zou Hongmei Ma Wuqi Wen Yizhong Yu Ying Lu Peng Wang Jianquan Yao 《中国光学快报(英文版)》2006,4(2)
An all-solid-state quasi-continuous-wave dispersion cavity tunable Ti:sapphire laser pumped by a laser diode pumped frequency-doubled Nd:YAG laser is reported. Using a dense flint glass prism as the dispersion element, a tuning range from 730 to 880 nm with the linewidth of 3 nm and the pulse width of 17.2ns was obtained. The maximum output power of this laser system was 5.6 W at 786.3 nm corresponding to an optical-to-optical conversion efficiency of 25.5% under the pump power of 22 W. 相似文献
9.
An all-solid-state quasi-continuous-wave dispersion cavity tunable Ti:sapphire laser pumped by a laser diode pumped frequency-doubled Nd:YAG laser is reported. Using a dense flint glass prism as the dispersion element, a tuning range from 730 to 880 nm with the linewidth of 3 nm and the pulse width of 17.2 ns was obtained. The maximum output, power of this laser system was 5.6 W at 786.3 nm corresponding to an optical-to-optical conversion efficiency of 25.5% under the pump power of 22 W. 相似文献
10.
High Efficiency Pulse Acetone Liquid Raman Laser Using DCM Fluorescent Dye as the Enhancement Medium
下载免费PDF全文
![点击此处可从《中国物理快报》网站下载免费的PDF全文](/ch/ext_images/free.gif)
Pumped by a frequency-doubled Nd:YAG laser, 10-Hz repetition rate, 320-mJ pump energy, and 5.1-ns pulse width, a liquid Raman laser using acetone as the Raman shifting medium has been established. The residual pump laser pulse and the generated Stokes pulse are directed to a DCM dye cell for energy enhancement of the Stokes pulse. The Raman laser system is capable to produce a laser pulse at wavelength 630nm, with single pulse energy of 120md, peak power of 70MW and an average power of 1200mW. The energy conversion efficiency is 37.5%, or equivalently a quantum efficiency of 44.5%. 相似文献
11.
This paper investigates the scattering effect of
domestic 0.5 at{\%} ceramic Nd:YAG. An effective method has been
utilized to measure the scattering and absorption coefficients.
An end-pumped continuous wave (CW) Nd:YAG ceramic laser was also
demonstrated. A maximum output power of 6.7~W at 1064~nm was
obtained at an 808-nm pump power of 32.9~W. Conversion efficiency
and slope efficiency have been achieved. This indicates that
scattering has an important effect on the optical performance of
ceramic Nd:YAG. 相似文献
12.
A corner-pumped type is a new pumping type in the
diode-pumped all-solid-state lasers, which has the advantages of
high pump efficiency and favourable pump uniformity. A highly
efficient corner-pumped Nd:YAG/YAG composite slab laser is
demonstrated in this paper. The maximal continuous-wave output power
of the 1064~nm laser is up to 18.57~W with a slope efficiency and an
optical-to-optical conversion efficiency of 44.9{\%} and 39.8{\%},
respectively. Inserting an acousto-optic $Q$-switch in the cavity,
the highest average output power of the quasi-continuous wave
1064~nm laser of 6.73~W is obtained at a repetition rate of
9.26~kHz. The experimental results show that a corner-pumped type is
a kind of feasible schedules in the design of diode-pumped
all-solid-state lasers with low or medium output powers. 相似文献
13.
High efficiency continuous-wave tunable signal output of an intracavity singly resonant optical parametric oscillator based on periodically poled lithium niobate
下载免费PDF全文
![点击此处可从《中国物理 B》网站下载免费的PDF全文](/ch/ext_images/free.gif)
In this paper we report on a continuous-wave (CW) intracavity singly
resonant optical parametric oscillator (ICSRO) based on periodically
poled LiNbO3 (PPLN) pumped by a diode-end-pumped CW
Nd:YVO4 laser. Considering the thermal lens effects and
diffraction loss, an optical ballast lens and a near-concentric
cavity are adopted for better operation. Through varying the grating
period and the temperature, the tunable signal output from 1406~nm
to 1513~nm is obtained. At a PPLN grating period of 29~μ m and a
temperature of 413~K, a maximum signal output power of 820~mW at
1500~nm is achieved when the 808~nm pump power is 10.9~W, leading to
an optical-to-optical conversion efficiency of 7.51%. 相似文献
14.
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
15.
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
16.
Laser-induced ultrafast photovoltaic effect is observed in LaSrAlO4 single crystal at ambient temperature without any applied bias. An open-circuit photovoltage is obtained when the wafer is irradiated by a 248-nm-KrF laser pulse of 20 ns duration. The response time and full width at half maximum of the photovoltage pulse are 6 ns and 19 ns, respectively, indicating that LaSrAlO4 single crystal has potential application in ultraviolet detector. 相似文献
17.
在自锁模飞秒钛宝石激光器运转状态不变的条件下,仅仅改变所加光阑,便可获得三波长或双波长的飞秒光脉冲运转.在此基础上,我们比较了这两种运转状态下激光器输出脉冲的脉宽,啁啾、中心波长间距和输出功率的差异.给出了在不同条件下运转时的双波长激光器的输出特性.讨论了多波长运转时的一些规律. 相似文献