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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Official URL: http://jap.aip.org/resource/1/japiau/v81/i6/p2889_...
Related URL: http://dx.doi.org/10.1063/1.363948
Abstract
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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