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目前不同波长输出的氦氖激光器已经很多，但大部分的研究和应用是在可见和红外波段。若将氦氖激光器的波段扩展到紫外区，并开发成连续紫外激光器产品，则是很有用的．非线性光学技术是扩展激光波段的有效途径．对于1m增益长的氦氖激光器，输出反射镜的透过率在1．46％左右，输
At present, there are many helium-neon lasers with different wavelength outputs, but most of the research and applications are in the visible and infra-red bands. It is useful if the HeNe laser band is extended to the UV region and developed into a continuous UV laser product. Nonlinear optical technology is an effective way to extend the laser band. For 1m long gain HeNe laser, the output mirror transmittance of about 1.46%, lose