High density integrated optical chip with low index difference and high index difference waveguide functions
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United States of America Patent
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Jul 5, 2005
Grant Date -
Feb 12, 2004
app pub date -
Mar 7, 2003
filing date -
Mar 12, 2002
priority date (Note) -
Expired
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Abstract
The invention features a programmable optical chip. The optical chip has a plurality of optical functions, each of which is connected to a waveguide having a core and a cladding. A photosensitive layer is disposed between at least three of the waveguides, and the photosensitive layer has a refractive index similar to that of the cladding prior to exposure to irradiation. The photosensitive layer changes refractive index upon exposure to irradiation to selectively form an optical connection between at least two of the waveguides.
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