Waveguide coupling into photonic crystal waveguides
First Claim
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1. A coupling element comprising:
- a first stage having a 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 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
39 Claims
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1. A coupling element comprising:
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a first stage having a 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 to said waveguide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 14, 30, 31, 32)
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8. A method of forming a coupling element comprising:
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providing a first stage having a dielectric waveguide that is transitioned 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 (9, 10, 11, 12, 13, 34, 35)
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15. 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 transitions said waveguide to a dielectric element. - View Dependent Claims (16, 17, 18, 19, 20, 36, 37)
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21. The coupling element of claim 21, wherein said resonators comprise a coupled cavity waveguide.
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22. 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 transitions said waveguide to a dielectric element. - View Dependent Claims (23, 24, 25, 26, 27, 28, 38, 39)
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29. 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 (33)
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Specification