Sethi, Purnima and Kallega, Rakshitha and Haldar, Anubhab and Selvaraja, Shankar Kumar (2018) Compact broadband low-loss taper for coupling to a silicon nitride photonic wire. In: OPTICS LETTERS, 43 (14). pp. 3433-3436.
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Abstract
We demonstrate an ultra-compact waveguide taper on a silicon nitride platform. The proposed taper provides a coupling efficiency of 95% at a length of 19.5 mu m in comparison to the standard linear taper of length 50 mu m, which connects a 10 mu m wide waveguide to a 1 mu m wide photonic wire. The taper has a spectral response > 75% spanning over 800 nm and resilience to fabrication variations; +/- 200 nm change in taper and end waveguide width varies transmission by <5%. We experimentally demonstrate taper insertion loss of <0.1 dB/transition for a taper as short as 19.5 mu m, and reduce the footprint of the photonic device by 50.8% compared to the standard adiabatic taper. To the best of our knowledge, the proposed taper is the shortest waveguide taper ever reported in silicon nitride. (C) 2018 Optical Society of America
Item Type: | Journal Article |
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Publication: | OPTICS LETTERS |
Publisher: | OPTICAL SOC AMER, 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA |
Additional Information: | Copy right for this article belong to OPTICAL SOC AMER, 2010 MASSACHUSETTS AVE NW, WASHINGTON, DC 20036 USA |
Department/Centre: | Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering |
Date Deposited: | 23 Aug 2018 16:00 |
Last Modified: | 25 Aug 2022 08:48 |
URI: | https://eprints.iisc.ac.in/id/eprint/60486 |
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