Optical waveguides – Directional optical modulation within an optical waveguide – Electro-optic
Reexamination Certificate
2005-04-05
2005-04-05
Frech, Karl D. (Department: 2876)
Optical waveguides
Directional optical modulation within an optical waveguide
Electro-optic
C372S026000
Reexamination Certificate
active
06876783
ABSTRACT:
An optical device including strained and non-strained regions along an optical medium. In one aspect of the present invention, strain-inducing material disposed proximate to the optical medium induces one or more perturbations of a refractive index along the optical medium to selectively reflect an optical beam directed through the optical medium having a first center wavelength back out a first end of an optical path as remaining wavelengths of light are propagated through a second end. In another embodiment, an optical device may include a strained region disposed in a non-strained region so that one or more perturbations of the refractive index compensates for birefringence of an optical beam directed through the optical medium.
REFERENCES:
patent: 6288410 (2001-09-01), Miyazawa
patent: 6337868 (2002-01-01), Mizutani
Almashary, B.A., et al., “Stress-Induced Vertical Confinement of Light in Bulk GaAs and Si Substrates,” IEEE Photonics Technology Letters, vol. 8, No. 10, Oct. 1996, pp. 1358-1360.
Lea, E., et al., “Photoelastic waveguides in silicon,” Electronics Letters, vol. 32, No. 17, Aug. 15, 1996, pp. 1577-1579.
Blakely , Sokoloff, Taylor & Zafman LLP
Frech Karl D.
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