Fig. 13
From: Subwavelength grating-assisted silicon nitride edge coupler with relaxed alignment tolerance
(a) Schematic and (b) optical microscope image of the fabricated SWG-assisted edge coupler with an elongated tip. (c) Calculated coupling efficiency between the proposed SWG-assisted edge coupler and SMF-28 fiber based on the elongated tip length at a wavelength of 1550 nm.
