提出补偿热透镜效应的有效措施。
建立了表面热透镜实验测量系统。
热透镜效应是影响激光焊接质量的重要因素之一。
Thermal focusing is an important factor to influence the quality of laser welding.
提出一种动态补偿热透镜效应的方法，分析了其可行性。
Also a method to dynamically compensating the thermal lensing is discussed.
研究了强激光作用下非热平衡状态光学元件的热透镜效应。
This paper studies the thermal lensing effect of optical element under laser heating at non-thermal equilibrium state.
实验结果表明，优化后的热透镜谐振腔具有较高的指向精度。
The experiment shows that the optimized thermal lens resonator has the better pointing stability.
把激光棒等效为梯度折射率棒，得到了新的热透镜焦距公式。
Based on that the laser rod is equivalent to gradient index rod (GRIN), a new thermal lens focal length expression was achieved.
讨论了热透镜信号中出现的致冷效应及弛豫速率较快的原因。
The cooling effect emerged from the signal of thermal lensing and the reason of fast relaxation have been discussed.
本文把这种热效应归为薄的热透镜，详细讨论了热效应的影响。
The influences due to the thermal len are discussed in detail in this paper.
热透镜技术按照测量方式的不同可以分为反射式和透射式两种。
Based on the configuration, TL techniques can be divided into reflected and transmitted thermal lens.
对激光晶体的热透镜效应进行了分析并得到了热透镜焦距公式。
Then, thermal lens formula has been gotten by analyzing the thermal lens effect of laser rod.
用时间分辨热透镜技术测定了铬酰氯分子在不同气压下的弛豫速率。
Relaxation rates of chromyl chloride molecules have been measured under different pressures using the technique of thermal lensing.
对于输出窗准确的温度场和热形变场研究是解决热透镜效应的关键。
So accurate temperature field and thermal distortion field analysis is the key to resolve these problems.
目前，广泛使用的测量弱吸收的方法有光热偏转技术和表面热透镜技术。
At present, photothermal deflection technology and surface thermal lensing technology are widely applied in weak absorption measurement.
重点讨论了以“热透镜效应”和“蜃景效应”为基础的一类激光光热光谱法。
A laser photothermal spectrometry based on the "thermal lens effect" and the "mirage effect" is discussed with emphasis.
最后，简单地讨论了离子气体激光器和某些其它激光器中的可能热透镜效应。
Finally, possible thermal lensing effects in ion gas lasers and other lasers are briefly discussed.
分析了高功率激光通过窗口时，引起的窗口热透镜效应及其对激光光束质量的影响。
This paper concerns the thermal lensing effect that occurs as laser going through an optical window, and its influence on beam quality.
实验采用凸平直线非稳腔，将凸面镜和增益介质热透镜效应等效为望远镜系统进行分析。
In the experiment we used convex-plane unstable resonator, and analysis the convex mirrors and gain medium thermal lens as a telescope system.
分析了对固体激光介质热效应有重要影响的工作物质、泵浦源，研究了热透镜产生的原因。
We research the issue of heat effect in the laser medium, analysis the work of substances, pump source, the cause of thermal lens which has an important impact on solid-state laser medium heat effect.
特别由于脉冲附带长的拖尾加剧了热透镜效应，使得脉冲重复频率的增加引起转换效率的降低。
Specially, the thermal lens effect is intensified due to the long tail attached to pulse, which leads to decreasing of conversion efficiency if pulse repetition rate is enhanced.
结果表明，热透镜效应对输出功率和频率特性影响相当大，对基模输出激光器的影响最为突出。
It is shown that the thermal lensing effects have considerable influence on the output and resonance frequencies, particularly for the fundamental mode lasers.
提高端面抽运功率占有率，可在一定程度上减小热透镜效应对振荡光束尺寸和衍射损耗的影响。
The influences of the thermal lens effect on the oscillation beam radius and diffraction loss can be reduced by increasing the proportion of the end-pumping power.
本文用光束偏转法和干涉法分别测量了以熔石英为窗口材料的铜蒸气激光器及其窗口的热透镜效应。
The thermal lenses in operating copper vapor lasers and in the fused silica Windows were measured by using of the deflection method and the interferometer method respectively.
激光波长处于大气传输窗口，对大气变化不敏感；工作物质快速流动，不存在热透镜效应和破坏阈值；
The laser work media flows fast, and it has no the thermal lens effect and damage threshold.
对激光晶体产生的温度场和端面热形变场的研究为解决晶体热透镜效应、提高激光器的性能起指导作用。
The study for temperature fields and pump-face thermal distortions will offer a theoretical direction for solving thermal lens effect of laser crystal to improve laser performance.
因为近场探测tls能实现热透镜光谱仪的小型化、提高系统的稳定性，所以近年来引起了学者的极大兴趣。
In recent years, the near-field detection TLS, which enables a more compact and stable thermal lens spectrograph, draws researchers attention extremely.
应用表面热透镜技术研制了薄膜吸收测量仪，测量结果表明其吸收率测量灵敏度和精度均达10- 6量级。
A measurement apparatus for thin film absorption based on STL technique is constructed. The measuring results prove that the sensitivity and accuracy of this instrument reach 10 -6 magnitude.
然后分别在空腔和考虑热透镜效应的情况下对输出光束的光场分布进行了理论模拟，并讨论了热透镜效应对输出光场分布的影响。
Then the output intensity distributions are simulated with or without considering the thermal lens effect. And the influence of the thermal lens effect is discussed.
该热稳定腔可应用于大功率半导体泵浦固体激光器，有效消除腔内的热透镜效应，在激光大功率输出时保证激光器性能稳定可靠。
The thermally-stabilized resonance cavity can be used in high power diode-pumped solid state laser, it can eliminate thermal-lensing and ensure the laser performance stability and credibility.
LD泵浦固体激光器出现使激光器得到飞速发展，但是其在大功率运行时所表现出的强烈的热透镜效应，严重影响了激光器的稳定性和输出光的模式、光束质量。
Laser techniques is surging with LD-pumped solid-state laser. But, the stability, model and beam quality of the laser are strongly affected by the thermal lens effect at high power.
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