Inverse-Designed Tapers for Compact Conversion Between Single-Mode and Wide Waveguides
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arXiv
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| Main Authors: | , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866912128789643264 |
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| author | Probst, Michael J. Khurana, Arjun Kaushalram, Archana Ralph, Stephen E. |
| author_facet | Probst, Michael J. Khurana, Arjun Kaushalram, Archana Ralph, Stephen E. |
| contents | Waveguide tapers are critical components for leveraging the benefits of both single-mode and wide waveguides. Adiabatic tapers are typically hundreds of microns in length, dramatically limiting density and scalability. We reenvision the taper design process in an inverse-design paradigm, introducing the novel L-taper. We present a novel approach to inverse-designed tapers where the input and output waveguides are rotated 90 degrees with respect to each other. The resultant design has an order-of-magnitude smaller footprint, and the design process is compatible with a variety of fabrication processes. We demonstrate an L-taper designed on 220 nm silicon-on-insulator that converts a 0.5 micron waveguide to a 12 micron waveguide with -0.38 dB transmission and 40 nm 1-dB bandwidth. The footprint is 16 micron by 6 micron, representing a 12x smaller footprint than a linear taper with the same transmission. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_14309 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Inverse-Designed Tapers for Compact Conversion Between Single-Mode and Wide Waveguides Probst, Michael J. Khurana, Arjun Kaushalram, Archana Ralph, Stephen E. Optics Waveguide tapers are critical components for leveraging the benefits of both single-mode and wide waveguides. Adiabatic tapers are typically hundreds of microns in length, dramatically limiting density and scalability. We reenvision the taper design process in an inverse-design paradigm, introducing the novel L-taper. We present a novel approach to inverse-designed tapers where the input and output waveguides are rotated 90 degrees with respect to each other. The resultant design has an order-of-magnitude smaller footprint, and the design process is compatible with a variety of fabrication processes. We demonstrate an L-taper designed on 220 nm silicon-on-insulator that converts a 0.5 micron waveguide to a 12 micron waveguide with -0.38 dB transmission and 40 nm 1-dB bandwidth. The footprint is 16 micron by 6 micron, representing a 12x smaller footprint than a linear taper with the same transmission. |
| title | Inverse-Designed Tapers for Compact Conversion Between Single-Mode and Wide Waveguides |
| topic | Optics |
| url | https://arxiv.org/abs/2411.14309 |