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An imprint master was fabricated by ultra precision machining (UPM) for optical waveguide. And we manufactured multimode waveguides using a thermal imprint method and the UPM master. We found that the master was suitable for an optical waveguide because it had a simple process and a fine surface profile.
We fabricated straight multimode optical waveguide films to analyze quantitatively the effectiveness of the helical bending. The optical waveguide films were very flexible and the refractive index difference between the core and the clad was 1.53% at a wavelength of 0.85 mum. This paper focuses on the helical bending losses under a proper index difference. Therefore, we measured first the bending...
A rigid-flexible optical and electrical printed circuit board (RFOE-PCB) was fabricated using a conventional PCB manufacturing process for mobile devices. The RFOE-PCB was designed to be embedded with a flexible 45-ended optical waveguide. In order to apply it to mobile devices, a repeating folding test and an environment test were carried out for physical and optical reliability. The RFOE-PCB successfully...
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