Compact integrated mode-size converter using a broadband ultralow-loss parabolic-mirror collimator
| Autor: | Hongnan Xu, Yue Qin, Gaolei Hu, Hon Ki Tsang |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Optics Letters. 48:327 |
| ISSN: | 1539-4794 0146-9592 |
| Popis: | In this Letter, we propose and demonstrate an integrated mode-size converter (MSC) with a compact footprint, low losses, and a broad bandwidth. By exploiting a parabolic mirror, the divergent light from a narrow waveguide (450 nm) is collimated to match the mode size of a wide waveguide (10 µm). The measured insertion loss (IL) is ≈ 0.15 dB over a 100-nm bandwidth. The mode-size conversion is achieved with a footprint as small as ≈ 20 × 32 µm2, which is much shorter than the linear taper length required to attain the same level of losses. |
| Databáze: | OpenAIRE |
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