22 January 1997 Design and analysis of wide-angle Y-branch waveguide with low losses for integrated optics
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Abstract
A new wide-angle, low-loss, symmetrical Y-branch waveguide is proposed. The waveguide configuration utilizes ribs for lateral confinement in the planar guiding region underneath. This Y-branch structure can be fabricated easily without any additional processes. Together with multi-mode interference effect, a local decrease of the waveguide ridge in a wedge at the Y-branch region reduces the radiation loss. When properly designed, the proposed Y-branch has a radiation loss as low as 2.2 dB at a branch angle of 6 degrees with index difference ((Delta) n/n) as small as 7.1 multiplied by 10-4 at a wavelength of 870 nm in the TE fundamental mode.
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Dong-Sun Min, Dong-Sun Min, Dietrich W. Langer, Dietrich W. Langer, Dhruv K. Pant, Dhruv K. Pant, Rob D. Coalson, Rob D. Coalson, } "Design and analysis of wide-angle Y-branch waveguide with low losses for integrated optics", Proc. SPIE 3006, Optoelectronic Integrated Circuits, (22 January 1997); doi: 10.1117/12.264242; https://doi.org/10.1117/12.264242
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