| 1. | The length of the laser tube was reduced ten times
雷射管的长度缩短了十分之九。 |
| 2. | Customer optional cooling water machine for laser tube , greatly prolonging the working life of the tube and bettering engraving effect
用户可选的激光管专用冷水机，大大提高激光管的工作寿命和雕刻效果。 |
| 3. | The laser power not only makes the co2 laser tube starting easily , gives the full scope to the function of it , but also improves the radiation efficiency , prolongs the service life of laser tube and laser power supply
本电源可使二氧化碳激光器启辉容易、使二氧化碳激光器的性能得到充分发挥，转换效率提高，延长激光器的寿命。 |
| 4. | A normal co - axis he - ne laser tube with bore length l = 190 mm was used . with pid and self - organised fuzzy control , the frequency error could be confined to a 10 ~ 9 level . in addition , preheating time and anti - interference were within requirements
选用腔长l = 190mm的普通同轴式he一e激光管，采用pid和自组织模糊控制模式可达到10一的稳频精度效果，并满足预热时间和抗干扰要求。 |
| 5. | Therefore , the frequency - stabilised double longitudinal modes with thermoregulation were adopted . this method was realised by winding wire with high electrical resistance on to the neck of laser tube . heating was controlled by self - organised fuzzy control method
为此，提出了增加有缠绕于激光管颈上的电阻丝辅助加热控制环节的自四川大学博一l :学位论文组织模糊控制双纵模热稳频方法。 |
| 6. | For example , when using pid control method of controlling the electrical current of the discharge , with the discharge tube exposed to the outside with very good thermal dispersion conditions , unrestrained thermal expansion back - pack style he - ne laser tube gave good results
采用控制激光器的放电电流的pid控制模式，在放电管外露，散热条件好；热变形不受约束的背包式he - ne激光管上取得了很好的效果。 |
| 7. | But when concerned with higher magneto - optical recording density , the kerr angle become smaller at shorter wavelength than at longer wavelength result from recoding and reading the memory information by shorter wavelength semiconductor laser tube . further more the signal - to - noise of recording information lowers and brings difficulty for the reading
但在更高密度磁光记录方面，由于信息记录与读出采用短波长半导体激光管,磁光记录材料的克尔旋转角比长波长时小，导致记录信息的信噪比下降，给信息读出带来困难，为此将对材料进行改性。 |
| 8. | On describing a genetic algorithm ( ga ) , we present a method for applying ga to optimize the lasers . a programming is presented for obtaining the maximum laser power . by using the method we optimize the cvl and the co2 laser , including lc circuit parameters of the cvl , the cvl system , the lasing resonator and the gas components mixtured in the co2 laser tube
在这个部分中，首先简述了遗传算法，讨论了应用遗传算法来优化激光器的思想和方法，给出了优化大功率激光器的计算机程序设计；然后，对铜蒸汽激光器lc放电电路、大口径激光器和激光器系统分别进行了优化；对二氧化碳激光器谐振腔和气压参量分别进行了优化，介绍了优化二氧化碳激光器谐振腔的实验以及实验所获得的结果 |
| 9. | The definition of stability and repeatability of the laser frequency and factors affecting the stability of laser frequency were analysed . the normal methods used to stabilise frequency and produce double - frequency were explained . after analysing the working conditions and related parameters of the laser device , it was concluded that the laser tube should be put inside an insulating cover and an electric discharge tube with a bigger diameter and length , smaller wall thickness and a higher thermal conductivity coefficient should be chosen
分析了激光频率的稳定性、复现性的定义及影响激光频率稳定的因素；介绍了常见的稳频及产生双频的方法；分析论证了激光器双纵模热稳频的使用条件和有关参数的关系，得到结论是：应将激光管装在保温罩内；选用放电管直径及长度大、壁厚小、材料导热系数大的放电管。 |
