Polymer cladding materials under high temperatures

Clark, Timothy E.; Chang, Selee; Oh, Jung Hyun

doi:10.1109/avfop.2011.6082136

Cited by 1 publication

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“…We have previously published test results of 200/230 micron silica core fibers with 1.374 index claddings under temperatures of 150ºC for a period of over 6400 hours 2 ; later, we demonstrated changes occurring in polymer films under elevated temperatures of 250ºC 6 . In this paper, we again focus on testing of the materials, rather than fibers fabricated using these polymers as claddings.…”

Section: Environmental Testing Of Polymers With Low Indexmentioning

confidence: 83%

Behavior of polymer cladding materials under extremely high temperatures

Clark¹,

Chang

Kwak

et al. 2012

Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XII

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Polymer claddings with low refractive indices for silica core fibers were developed. Applications include fiber lasers and transmission of high power lasers in surgery 1 . For many applications, operating fibers under high temperatures is desirable. In a previous publication, the results of testing polymer cladded silica core fiber at 150ºC for 6400 hours were given, along with 5000 hours of testing polymer films 2 . The results at 150ºC were encouraging, with little additional loss measured. Here we test polymers under more severe conditions, at 270ºC, for periods up to 10 hours. The polymers' cured indices range from 1.374 to 1.397 (at 852 nm). Changes in Young's modulus, refractive index, yellowing, weight, hardness, strength, and elongation were observed. While these polymers cannot function at 270ºC for extended periods, it is possible to expose them for shorter durations without significant damage. Some polymer properties actually improved after 4 hours of heating. Fibers clad with such polymers have been successfully jacketed with extruded materials, and have endured high temperatures for a few minutes 3 . It is possible that a sensor, fiber laser or other fiber device could function in these temperatures for short periods without the coating properties changing beyond values required for operation.

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Section: Environmental Testing Of Polymers With Low Indexmentioning

confidence: 83%