Abstract
Very low loss integrated optical waveguides are always attractive for photonic applications. Materials and fabrication techniques that are economic and offer flexibility are sought after for passive and active waveguide devices. Advantages of optically transparent polymer materials for waveguide applications have been known for quite some time.1 This work reports on a unique laser fabrication technique of very low loss channel waveguides on spin coated films of polymethylmethacrylate (PMMA). Two advantages derived out of this processing method are (1) top surface of the film is left as deposited and (2) the edges of the waveguides are smooth due to the gentle processing of laser beam with Gaussian profile. The fabricated channel waveguides can be used as high mode volume optical interconnects or doped to form well known active devices such as waveguide lasers2 and optical switches.
© 1994 Optical Society of America
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