Optical waveguides – Planar optical waveguide – Thin film optical waveguide
Patent
1990-07-05
1991-11-12
Lee, John D.
Optical waveguides
Planar optical waveguide
Thin film optical waveguide
385129, 385 35, G02B 610
Patent
active
050642669
ABSTRACT:
An apparatus and method are disclosed whereby channel waveguides are formed to have substantially circular cross-section shapes to more closely match the circular cross-section shape of a typical optical fiber. Rectangular cross-section channel waveguides are heated to create surface tension between the core and cladding layers resulting in the rectangular shape changing to a substantially circular shape. An over cladding layer may be added to the circular cross-section waveguide. A method is also disclosed whereby monolithic lenses may be formed from the same circular cross-section waveguides on a common substrate, simultaneously, to provide substantially perfectly aligned lenses and waveguides that are not prone to alignment and bonding problems of discrete lenses.
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Miyashita Tadashi
Sakaguchi Shigeki
Sumida Shin
Sun Cheng-ko J.
Heartney Phan T.
Lee John D.
Photonic Integration Research, Inc.
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