Efficient fiber-to-waveguide coupling through the vertical leakage from a microring
Optics Letters, Vol. 32, Issue 19, pp. 2861-2863 (2007)
http://dx.doi.org/10.1364/OL.32.002861
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Abstract
A fiber-to-waveguide coupler is proposed to efficiently couple light from a single-mode fiber into a submicrometer semiconductor waveguide for integration with optoelectronic circuits. A microring with a specific refractive index is designed on the top of the semiconductor waveguide. The gradual vertical leakage from the microring forms steady coupling into the semiconductor waveguide. Coupling efficiency up to 93% is demonstrated using the three-dimensional finite-difference time-domain method. A tapered-waveguide or microring structure can be used to convert the lateral-mode size for coupling light into a single-mode semiconductor waveguide.
© 2007 Optical Society of America
OCIS Codes
(060.1810) Fiber optics and optical communications : Buffers, couplers, routers, switches, and multiplexers
(130.3120) Integrated optics : Integrated optics devices
(130.5990) Integrated optics : Semiconductors
(230.7400) Optical devices : Waveguides, slab
(240.7040) Optics at surfaces : Tunneling
ToC Category:
Integrated Optics
History
Original Manuscript: July 3, 2007
Manuscript Accepted: August 22, 2007
Published: September 27, 2007
Citation
Zhaolin Lu, "Efficient fiber-to-waveguide coupling through the vertical leakage from a microring," Opt. Lett. 32, 2861-2863 (2007)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-32-19-2861
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