2010
DOI: 10.1016/j.optcom.2010.05.034
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Ultra-low-loss inverted taper coupler for silicon-on-insulator ridge waveguide

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Cited by 210 publications
(120 citation statements)
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“…The width at the end of the silicon waveguide is tapered from 450 nm to a tiny tip end of 40 nm so that the guided mode will be expanded into a polymer waveguide, surrounding the SOI waveguide and the taper. loss [11]. The measured propagation loss is 4.7 dB/cm and the device insertion loss is 7 dB.…”
Section: Experimental Setup and Proceduresmentioning
confidence: 92%
“…The width at the end of the silicon waveguide is tapered from 450 nm to a tiny tip end of 40 nm so that the guided mode will be expanded into a polymer waveguide, surrounding the SOI waveguide and the taper. loss [11]. The measured propagation loss is 4.7 dB/cm and the device insertion loss is 7 dB.…”
Section: Experimental Setup and Proceduresmentioning
confidence: 92%
“…The designed waveguide is fabricated on silicon-on-insulator (SOI) material using electron-beam lithography followed by reactive-ion etching (RIE). The 3-mm long silicon waveguide is inversely tapered at both ends, from 450 nm to less than 20nm and covered by a polymer waveguide for efficient fiber coupling [12]. The propagation loss of the silicon waveguide is ~4.3 dB/cm and the fiber-to-fiber loss of the device is ~4 dB.…”
Section: Device Design and Characterizationmentioning
confidence: 99%
“…Fiber to chip coupling can be accomplished both in-plane and out of plane ways. The former is typically done through edge coupling by means of an adiabatic spot size converter [6][7][8]. It essentially involves a lensed fiber placed at the end facet of a chip with an inverse tapered Si spot size waveguide embedded in an overlay medium that matches the fiber cross section (see Figure 1).…”
Section: Introductionmentioning
confidence: 99%
“…As light propagates through the wire waveguide (which converges to a spot), the mode expands adiabatically in the overlay resulting in a near perfect overlap with the fiber mode at the spot end. Inverse tapers have been found to yield losses as low as -0.36 dB/facet [8]. In addition, edge couplers tend to have a low polarization sensitivity and exhibit a broadband response of 200-300 nm.…”
Section: Introductionmentioning
confidence: 99%