Laser direct writing for non-linear waveguides
First Claim
1. A system comprising:
- an electromagnetic radiation source to cure a waveguide by directing a laser beam defining a spot profile; and
a convolution compensator positioned to modify at least one of an intensity profile and a shape of the spot profile and configured to, in response to at least one geometric property of the waveguide being written, dynamically compensate for exposure convolution in a photo-curable layer when the laser beam is directed at the photo-curable layer and translated along a non-linear path in a plane parallel to the photo-curable layer to form a non-linear waveguide segment of the waveguide, wherein the intensity profile and the shape of the spot profile each comprise an inner side and an outer side corresponding to a bend of the non-linear path, wherein during translation of the convolution compensator along the non-linear path, the convolution compensator is configured to decrease the intensity profile from the outer side toward the inner side, taper the shape of the spot profile from the outer side toward the inner side, or both.
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Accused Products
Abstract
A waveguide includes multiple segments having different bend radii with substantially consistent cure profiles and related methods and systems for making and using the same. The waveguide is formed by modifying a laser beam used to write the waveguide to provide the consistent cure profile in the multiple segments. A marker characteristic of laser writing may be present in the waveguide. A method or system modifies an intensity profile or a shape profile of a laser beam to proactively compensate for exposure convolution based on the geometry of each waveguide segment. A convolution compensator is positioned in the path of the laser beam to modify the beam spot profile during writing to form the multiple segments of the waveguide in a photo-curable layer.
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Citations
10 Claims
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1. A system comprising:
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an electromagnetic radiation source to cure a waveguide by directing a laser beam defining a spot profile; and a convolution compensator positioned to modify at least one of an intensity profile and a shape of the spot profile and configured to, in response to at least one geometric property of the waveguide being written, dynamically compensate for exposure convolution in a photo-curable layer when the laser beam is directed at the photo-curable layer and translated along a non-linear path in a plane parallel to the photo-curable layer to form a non-linear waveguide segment of the waveguide, wherein the intensity profile and the shape of the spot profile each comprise an inner side and an outer side corresponding to a bend of the non-linear path, wherein during translation of the convolution compensator along the non-linear path, the convolution compensator is configured to decrease the intensity profile from the outer side toward the inner side, taper the shape of the spot profile from the outer side toward the inner side, or both. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification