Abstract
The major challange in extending planner light wave circuits (PLC) to a wider base of photonics applications is the compensation required for phase errors and intrinsic waveguide birefringence that arise in manufacturing. Laser trim ming is a potentially powerful tool to correct such phase errors1 and birefringence.2 While photosensitization enhancement techniques such as hydrogen loading are normally required to induce sufficient refractive index change, in PLCs the hydrogen-induced enhancement offers little shelf life and is intrinsically unstable due to rapid defect relaxation and residual hydrogen outdiffusion through a thin cladding layer.
© 2002 Optical Society of America
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