Formation of a graded-index waveguide in UV exposed polyimide

Sarkisov, Sergey ; Teague, Zedric ; Venkateswarlu, Putcha ; Abdeldayem, Hossin ; Frazier, Donald ; Adamovsky, Grigory (1997) Formation of a graded-index waveguide in UV exposed polyimide Journal of Applied Physics, 81 (6). pp. 2889-2891. ISSN 0021-8979

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We report on the formation of a graded-index waveguide in a photocrosslinkable fluorinated polyimide upon its photodarkening with the spectral line 313 nm of a mercury arc lamp at exposures exceeding 5 J/cm2. Photodarkening prevents the UV radiation from penetration deep into the polymer and finally sets the region with increased refractive index near the top surface. A theoretical model based on this concept reconstructs the refractive index profile of the waveguide in agreement with the phase integral calculations based on waveguide mode spectrum.

Item Type:Article
Source:Copyright of this article belongs to American Institute of Physics.
Keywords:Optical Polymers; Polymer Films; Photochromism; Optical Fabrication; Optical Planar Waveguides; Gradient Index Optics; Refractive Index; Radiation Effects; Absorption Coefficients; Photolysis
ID Code:68595
Deposited On:08 Nov 2011 04:06
Last Modified:08 Nov 2011 04:06

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