Abstract: Optical signals are passed in an optical medium using an approach that facilitates the mitigation of interference. According to an example embodiment, a filtering-type approach is used with an optical signal conveyed in an optical fiber, such as a multimode fiber (MMF) or a multimode waveguide. Modal dispersion in the optical signal is mitigated.
Type:
Grant
Filed:
August 10, 2004
Date of Patent:
February 5, 2008
Assignee:
The Board of Trustees of the Leland Stanford Junior University
Inventors:
Joseph M. Kahn, Mark A. Horowitz, Olav Solgaard, Shanhui Fan
Abstract: Optical signals are passed in an optical medium using an approach that facilitates the mitigation of interference. According to an example embodiment, a filtering-type approach is used with an optical signal conveyed in an optical fiber, such as a multimode fiber (MMF) or a multimode waveguide. Adaptive spatial domain signal processing, responsive to a feedback signal indicative of data conveyed in the multimode waveguide, is used to mitigate interference in optical signals conveyed in the multimode waveguide.
Type:
Grant
Filed:
March 11, 2009
Date of Patent:
November 30, 2010
Assignee:
The Board of Trustees of the Leland Stanford Junior University
Inventors:
Joseph M. Kahn, Mark A. Horowitz, Olav Solgaard, Shanhui Fan
Abstract: An optical structure includes an optical waveguide and at least one photonic crystal structure. The optical structure also includes a structural portion mechanically coupled to the optical waveguide and the at least one photonic crystal structure such that a region substantially bounded by the structural portion, the optical waveguide, and the at least one photonic crystal structure has a specified volume.
Type:
Grant
Filed:
July 20, 2012
Date of Patent:
October 1, 2013
Assignee:
The Board of Trustees of the Leland Stanford Junior University
Inventors:
Onur Kilic, Michel J. F. Digonnet, Gordon S. Kino, Olav Solgaard, Shrestha Basu Mallick, Onur Can Akkaya
Abstract: Optical signals are passed in an optical medium using an approach that facilitates the mitigation of interference. According to an example embodiment, a filtering-type approach is used with an optical signal conveyed in an optical fiber, such as a multimode fiber (MMF) or a multimode waveguide. Adaptive spatial domain signal processing, responsive to a feedback signal indicative of data conveyed in the multimode waveguide, is used to mitigate interference in optical signals conveyed in the multimode waveguide.
Type:
Grant
Filed:
November 14, 2007
Date of Patent:
March 24, 2009
Assignee:
The Board of Trustees of the Leland Stanford Junior University
Inventors:
Joseph M. Kahn, Mark A. Horowitz, Olav Solgaard, Shanhui Fan
Abstract: We introduce a mechanically tunable photonic crystal structure consisting of coupled photonic crystal slabs. Using both analytic theory, and first-principles finite-difference time-domain simulations, we demonstrate that the transmission and reflection coefficients for light normally incident upon such structures can be highly sensitive to nano-scale variations in the spacing between the slabs. Moreover, by specifically configuring the photonic crystal structures, the high sensitivity can be preserved in spite of significant fabrication-related disorders. We expect such a structure to play important roles in micro-mechanically tunable optical sensors and filters.
Type:
Grant
Filed:
August 15, 2006
Date of Patent:
August 12, 2008
Assignee:
The Board of Trustees of the Leland Stanford Junior University
Inventors:
Wonjoo Suh, Mehmet Fatih Yanik, Olav Solgaard, Shanhui Fan
Abstract: We introduce a mechanically tunable photonic crystal structure consisting of coupled photonic crystal slabs. Using both analytic theory, and first-principles finite-difference time-domain simulations, we demonstrate that the transmission and reflection coefficients for light normally incident upon such structures can be highly sensitive to nano-scale variations in the spacing between the slabs. Moreover, by specifically configuring the photonic crystal structures, the high sensitivity can be preserved in spite of significant fabrication-related disorders. We expect such a structure to play important roles in micro-mechanically tunable optical sensors and filters.
Type:
Grant
Filed:
October 8, 2003
Date of Patent:
December 26, 2006
Assignee:
The Board of Trustees of the Leland Stanford Junior University
Inventors:
Wonjoo Suh, Mehmet Fatih Yanik, Olav Solgaard, Shanhui Fan