US 9,810,839 B2
Controlled tunneling waveguide integration (CTWI) for effective coupling between different components in a photonic chip
Fang Wu, Ottawa (CA); Yury Logvin, Ottawa (CA); Kirill Y. Pimenov, Ottawa (CA); Christopher D. Watson, Ottawa (CA); and Yongbo Tang, Ottawa (CA)
Assigned to Artic Photonics Inc., Ontario (CA)
Filed by ArtIC Photonics Inc., Ottawa (CA)
Filed on Mar. 8, 2016, as Appl. No. 15/63,722.
Claims priority of provisional application 62/130,334, filed on Mar. 9, 2015.
Prior Publication US 2016/0327741 A1, Nov. 10, 2016
Int. Cl. G02B 6/00 (2006.01); G02B 6/125 (2006.01); G02B 6/136 (2006.01); H04B 10/2507 (2013.01); H04B 10/2581 (2013.01); G02B 6/12 (2006.01); G02B 6/122 (2006.01); G02B 6/124 (2006.01); G02B 6/126 (2006.01); G02B 6/13 (2006.01)
CPC G02B 6/125 (2013.01) [G02B 6/12002 (2013.01); G02B 6/124 (2013.01); G02B 6/126 (2013.01); G02B 6/1228 (2013.01); G02B 6/131 (2013.01); G02B 6/136 (2013.01); H04B 10/2507 (2013.01); H04B 10/2581 (2013.01); G02B 2006/1215 (2013.01); G02B 2006/12038 (2013.01); G02B 2006/12061 (2013.01); G02B 2006/12078 (2013.01); G02B 2006/12121 (2013.01); G02B 2006/12128 (2013.01); G02B 2006/12142 (2013.01); G02B 2006/12147 (2013.01); G02B 2006/12164 (2013.01)] 22 Claims
OG exemplary drawing
 
1. An integrated-photonics waveguide structure comprising:
a vertical waveguide stack comprising at least three vertically-stacked waveguides disposed on a substrate including an uppermost waveguide, a lowermost waveguide, and at least one middle waveguide; wherein
the vertical waveguide stack comprises one of:
(a) an active optical waveguide as the uppermost waveguide, a passive optical waveguide as the at least one middle waveguide, an active optical waveguide as the lowermost waveguide;
(b) a laser guide as the uppermost waveguide, a passive guide as the at least one middle waveguide, a modulator guide as the lowermost waveguide;
(c) a photodetector guide as the uppermost waveguide, a laser guide as the at least one middle waveguide, a passive guide as the lowermost waveguide; and
(d) a photodetector guide as the uppermost waveguide, a passive guide as the at least one middle waveguide, a passive guide as the lowermost waveguide;
the vertical waveguide stack comprises semiconductor quantum well materials as waveguide cores and n-doped and p-doped semiconductor materials as waveguide cladding;
the waveguides terminate with lateral tapers which are formed in a direction of light propagation;
the lateral tapers produce optical coupling between the waveguides on adjacent vertical layers;
wherein superposition of lateral tapers corresponds to an overlap of coupling profiles which in turn corresponds to a condition of coherent tunneling by adiabatic passage; and
the condition of coherent tunneling by adiabatic passage corresponds to transfer of light from one outermost waveguide of the vertical waveguide stack directly to another outermost waveguide of the vertical waveguide stack whilst bypassing intermediate waveguides.