Waveguide coupling into photonic crystal waveguides
First Claim
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1. A coupling element comprising:
- a first stage having a smooth transition from a traditional index guiding dielectric waveguide to a waveguide having a sequence of resonators with a fixed period; and
a second stage that transitions said waveguide to a photonic crystal waveguide by gradually bringing closer at an angle the cladding bulk of said photonic crystal to said waveguide.
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Abstract
A coupling element includes a first stage having a dielectric waveguide that is transitioned to a waveguide having a sequence of resonators with a fixed period. A second stage transitions the waveguide to a photonic crystal waveguide by gradually bringing closer at an angle the cladding bulk of the photonic crystal to the waveguide.
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Citations
35 Claims
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1. A coupling element comprising:
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a first stage having a smooth transition from a traditional index guiding dielectric waveguide to a waveguide having a sequence of resonators with a fixed period; and a second stage that transitions said waveguide to a photonic crystal waveguide by gradually bringing closer at an angle the cladding bulk of said photonic crystal to said waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of forming a coupling element comprising
providing a first stage having a smooth transition from a traditional index guiding dielectric waveguide to a waveguide having a sequence of resonators with a fixed period; - and
providing a second stage that transitions said waveguide to a photonic crystal waveguide by gradually bringing closer at an angle the cladding bulk of said photonic crystal to said waveguide. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A coupling element comprising:
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a first stage that transitions a photonic crystal waveguide into a waveguide having a sequence of resonators with a fixed period by gradually diverging away at an angle the cladding bulk of said photonic crystal waveguide from said waveguide; and a second stage that comprises a smooth transition from said waveguide to a dielectric waveguide. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A method of forming a coupling element comprising:
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providing a first stage that transitions a photonic crystal waveguide into a waveguide by gradually diverging away at an angle the cladding bulk of said photonic crystal waveguide from said waveguide; and providing a second stage that comprises a smooth transition from said waveguide to a dielectric waveguide. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33)
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34. A coupling element comprising:
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an input coupling element comprising a first stage having a first dielectric waveguide that is transitioned to a waveguide having a sequence of resonators with a fixed period and a second stage that transitions said waveguide to a photonic crystal waveguide by gradually bringing closer at an angle the cladding bulk of said photonic crystal waveguide to said waveguide; and an output coupling element comprising a third stage that transitions said photonic crystal waveguide into said waveguide by gradually diverging away at an angle the cladding bulk of said photonic crystal waveguide from said waveguide and a fourth stage that transitions said waveguide to a second dielectric element. - View Dependent Claims (35)
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Specification