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Properties of hollow bent output tips in CO2 laser light delivery system

机译：CO2激光传输系统中空心弯曲输出尖端的特性

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In order to change the output direction of laser light in a small operation space, two types of hollow bent output tips are proposed for medical laser light delivery system. One is the hallow fiber insert-type, which is of the minimum bending radius of 3 cm. The other type, based on a fixed-bent pyrex glass tube, is of the minimum bending radius of 2 mm. Both types of tips are inner-coated with a silver layer and a cyclic olefin polymer (COP) layer. Loss properties for CO2 laser light are clarified for the insert-type tips with various bending angles and radii. For the fixed-bent tips, the losses are around 0.7 dB, which are almost not dependent on the bending angles and radii. Transmissions of the tips remain undamaged after 1-h-delivery of 5 W output CO2 laser light. A nickel layer is coated on the outside wall of fixed-bent tips so as to increase the mechanical strength and lower the surface temperature. Characteristics of surface temperature distribution and time response were experimentally discussed. Transmission properties of pilot beams are also evaluated. (C) 2001 Elsevier Science Ltd. All rights reserved. [References: 15]
机译：为了在较小的操作空间内改变激光的输出方向，提出了两种类型的中空弯曲的输出端用于医疗激光传输系统。一种是空心纤维插入式，其最小弯曲半径为3 cm。另一种类型是基于固定弯曲的耐热玻璃管，最小弯曲半径为2 mm。两种类型的尖端均内层涂有银层和环状烯烃聚合物（COP）层。阐明了具有各种弯曲角度和半径的插入式吸头的CO2激光的损耗特性。对于固定弯曲的尖端，损耗约为0.7 dB，这几乎与弯曲角度和半径无关。在1 h输出5 W的CO2激光后，针尖的传输不会受到损坏。在固定弯头的外壁上镀镍层，以提高机械强度并降低表面温度。实验讨论了表面温度分布和时间响应的特征。还评估了引导光束的传输特性。 （C）2001 Elsevier ScienceLtd。保留所有权利。 [参考：15]

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