We have made light-guiding thin films with losses of ∼ 2.2 dB/cm at 0.633 μm from Kodak KPR photoresist which has been processed to remove a photosensitizer which absorbs in the visible. Curved and straight optical strip guides as narrow as 5 μm have been written in these films and have shown light guiding with losses of 3 to 8 dB/cm at 0.633 μm.
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Weber et al. (1972) studied this question.
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