| 1. | A model for modulated crossed - beam thermal lens spectrometry
横向双光束调制热透镜理论模型 |
| 2. | The dependence of the surface thermal lens amplitude on the experimental parameters is analyzed
3 .建立了表面热透镜实验测量系统。 |
| 3. | Thermal lens spectrometry is a photothermal technique developed in 1980s
激光热透镜光谱法是20世纪80年代发展起来的一种光热光谱分析技术。 |
| 4. | Thermal lens spectrometry is a photothermal technique developed in 1980s
摘要激光热透镜光谱法是20世纪80年代发展起来的一种光热光谱分析技术。 |
| 5. | If a nd : yag laser runs at high pump power , laser resonator will generate multimode beam due to thermal lens of active rod . the higher pump power is , the bigger divergence occurs and the smaller rayleigh range is
当nd ： yag激光器工作在高泵浦功率下时，由于nd ： yag激光器工作物质的热透镜效应导致了谐振腔输出多模激光，随着泵浦功率的升高激光光束发散角增大，焦深减小。 |
| 6. | In the third chapter , the thermal lens effect of laser crystal is studied . the model of thermal lens theory and some measuring methods are explored . these methods are generalized and classified and the advantages and disadvantages of which are pointed out
第三章分析了激光晶体的热透镜效应，研究了热透镜理论模型和各种测量方法，对这些方法总结、归类并指出了各自的优缺点。 |
| 7. | According to this , the phase - matching conditions , effective nonlinear coefficients , acceptances of angle and wavelength for biaxial " crystals have been discussed in detail . thermal lens effect is an important factor which affects the quality of laser beam and the amount of output power
实验上，采用了双轴晶体lbo作为倍频晶体，因此对双轴晶体相位匹配、有效非线性系数的计算、允许角、允许波长给出了较完整的分析。 |
| 8. | The optimum position of focal spot of pumping laser through coupling system is calculated . in the fifth chapter , the optical characteristics of nd : yvo4 and lbo are studied . the astigmatism problem of resonant cavity is explored thoroughly under the condition of thermal lens effect
第五章分析了nd ： yvo _ 4和lbo晶体的光学特性，深入分析了在引入热透镜效应的情况下谐振腔的像散问题，设计了四镜z型折叠腔，应用abcd定律计算优化选择了一组腔参数。 |
| 9. | However , traditional methods , including spectrophotometric , extinction coefficient method , are not sensitive enough to measure absorption of thin films in the 10 ~ ( - 4 ) 10 ~ ( - 7 ) range which is often used in the modern optical system . surface thermal lens ( stl ) technique was developed by kuo and saito respectiv - ely in the early 1990s
光热技术的发展为光学薄膜微弱吸收测量提供了新的手段,表面热透镜技术( stl )作为光热技术测量光学薄膜微弱吸收的一种重要方法,在上世纪九十年代初,由kuo和saito分别提出。 |
| 10. | Because of high threshold of 946 nm laser , severe thermal lens effect will appear when the 946 nm laser operations . in the consideration of thermal lens effect , the - optimized folding cavity has been devised . the relation between thermal lens effect and the radius of laser beam waist has been given as well
由于946nm激光阈值很高，需要更强的泵浦功率密度，因此较大功率蓝光激光器的热透镜效应将会比红光和绿光激光器更明显，而热透镜效应是影响激光功率提高和激光输出稳定性的重要原因，所以在考虑到激光晶体热透镜效应的情况下，优化设计了折叠腔结构，并给出了热透镜效应和折叠腔中腔模半径大小的关系。 |
