ePrints@IIScePrints@IISc Home | About | Browse | Latest Additions | Advanced Search | Contact | Help

Alignment-tolerant broadband compact taper for low-loss coupling to a silicon-on-insulator photonic wire waveguide

Sethi, Purnima and Selvaraja, Shankar Kumar (2019) Alignment-tolerant broadband compact taper for low-loss coupling to a silicon-on-insulator photonic wire waveguide. In: APPLIED OPTICS, 58 (23). pp. 6222-6227.

[img] PDF
app_opt_58-23_6222_2019.pdf - Published Version
Restricted to Registered users only

Download (1MB) | Request a copy
Official URL: https://dx.doi.org/10.1364/AO.58.006222

Abstract

We experimentally demonstrate a broadband, fabrication-tolerant compact silicon waveguide taper (34.2 mu m) in a silicon-on-insulator wire waveguide. The taper works on multimode interference along the length of the taper. A single taper design has broadband operation with coupling efficiency >70% over 700 nm that can be used in O-, C-, and L-bands. The compact taper is highly tolerant to fabrication variations; +/- 100 nm change in the taper and end waveguide width varies the taper transmission by <5%. The footprint of the device, i.e., the taper along with linear gratings, approximate to 442 mu m(2), 11.5x smaller than the adiabatic taper. The taper with linear gratings provides coupling efficiency comparable to standard focusing gratings. We have also experimentally compared the translational and rotational alignment tolerance of the focusing grating with linear grating couplers.

Item Type: Journal Article
Additional Information: copyright for this article belongs to OPTICAL SOC AMER
Department/Centre: Division of Interdisciplinary Research > Centre for Nano Science and Engineering
Depositing User: Id for Latest eprints
Date Deposited: 18 Sep 2019 11:59
Last Modified: 18 Sep 2019 11:59
URI: http://eprints.iisc.ac.in/id/eprint/63519

Actions (login required)

View Item View Item