Continuously apodized fiber-to-chip surface grating coupler with refractive index engineered subwavelength structure
We demonstrate a fully etched, continuously apodized fiber-to-chip surface grating coupler for the first time (to our knowledge). The device is fabricated in a single-etch step and operates with TM-polarized light, achieving a coupling efficiency of 3.7 dB and a 3 dB bandwidth of 60 nm. A subwavelen...
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| Veröffentlicht in: | Optics letters 2010-10, Vol.35 (19), p.3243-3245 |
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| container_issue | 19 |
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| container_title | Optics letters |
| container_volume | 35 |
| creator | HALIR, R CHEBEN, P SCHMID, J. H MA, R BEDARD, D JANZ, S XU, D.-X DENSMORE, A LAPOINTE, J MOLINA-FERNIINDEZ, I |
| description | We demonstrate a fully etched, continuously apodized fiber-to-chip surface grating coupler for the first time (to our knowledge). The device is fabricated in a single-etch step and operates with TM-polarized light, achieving a coupling efficiency of 3.7 dB and a 3 dB bandwidth of 60 nm. A subwavelength microstructure is employed to generate an effective medium engineered to vary the strength of the grating and thereby maximize coupling efficiency, while mitigating backreflections at the same time. Minimum feature size is 100 nm for compatibility with deep-UV 193 nm lithography. |
| doi_str_mv | 10.1364/OL.35.003243 |
| format | Article |
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A subwavelength microstructure is employed to generate an effective medium engineered to vary the strength of the grating and thereby maximize coupling efficiency, while mitigating backreflections at the same time. 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| ispartof | Optics letters, 2010-10, Vol.35 (19), p.3243-3245 |
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| language | eng |
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| source | Optica Publishing Group Journals |
| subjects | Exact sciences and technology Fundamental areas of phenomenology (including applications) Optics Physics |
| title | Continuously apodized fiber-to-chip surface grating coupler with refractive index engineered subwavelength structure |
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