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

Yi Wei Shi; Zhi Yun Pan; Yuji Matsuura; Yuji Konno; Yoshizo Aizawa; Mitsunobu Miyagi

doi:10.1016/S0030-3992(01)00028-7

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

Yi Wei Shi, Zhi Yun Pan, Yuji Matsuura, Yuji Konno, Yoshizo Aizawa, Mitsunobu Miyagi

MEN - Biomedical Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

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 hollow 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.

Original language	English
Pages (from-to)	225-230
Number of pages	6
Journal	Optics and Laser Technology
Volume	33
Issue number	4
DOIs	https://doi.org/10.1016/S0030-3992(01)00028-7
Publication status	Published - 2001 Jun

Keywords

CO laser
Fixed-bent tip
Hollow fiber
Output device

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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title = "Properties of hollow bent output tips in CO2 laser light delivery system",

abstract = "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 hollow 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.",

keywords = "CO laser, Fixed-bent tip, Hollow fiber, Output device",

author = "Shi, {Yi Wei} and Pan, {Zhi Yun} and Yuji Matsuura and Yuji Konno and Yoshizo Aizawa and Mitsunobu Miyagi",

note = "Funding Information: The authors are thankful to Ms. J. Oishi and Mr. Y. Okagami for the cooperation in evaluating the tips in early stage of the research. This research has been supported by Grants from the Japan Society for the Promotion of Science and the Ministry of Education, Science, Sports and Culture of Japan.",

year = "2001",

month = jun,

doi = "10.1016/S0030-3992(01)00028-7",

language = "English",

volume = "33",

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journal = "Optics and Laser Technology",

issn = "0030-3992",

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TY - JOUR

T1 - Properties of hollow bent output tips in CO2 laser light delivery system

AU - Shi, Yi Wei

AU - Pan, Zhi Yun

AU - Matsuura, Yuji

AU - Konno, Yuji

AU - Aizawa, Yoshizo

AU - Miyagi, Mitsunobu

N1 - Funding Information: The authors are thankful to Ms. J. Oishi and Mr. Y. Okagami for the cooperation in evaluating the tips in early stage of the research. This research has been supported by Grants from the Japan Society for the Promotion of Science and the Ministry of Education, Science, Sports and Culture of Japan.

PY - 2001/6

Y1 - 2001/6

N2 - 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 hollow 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.

AB - 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 hollow 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.

KW - CO laser

KW - Fixed-bent tip

KW - Hollow fiber

KW - Output device

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