期刊
OPTICS EXPRESS
卷 25, 期 15, 页码 18355-18364出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.25.018355
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资金
- National High Technology Research and Development Program of China (863 Program) [2015AA015504]
- Major Project of Science and Technology Innovation Program of Hubei Province of China [2014AAA006]
- National Natural Science Foundation of China [61635004, 61107051]
With the development of highly densified photonic integrated circuits, the optical cross nodes number exhibits dramatically increasing. Not only efficient but also ultracompact waveguide crossings are required to materialize the full potential of silicon photonics for on-chip optical intercross connect. In this work, we proposed several inverse-designed 4 x 4, 5 x 5 and 6 x 6 star-crossings based on the photonic-crystal-like (PhC-like) subwavelength structures, which have ultra-high port density of about 7.1 mu m(2)/port, 5.83 mu m(2)/port and 7.3 mu m(2)/port respectively. Moreover, the star-crossings are practically fabricated and experimentally characterized. The average measured insertion losses (ILs) are less than 0.75, 0.9 dB and 1.5 dB, while the crosstalks are sub-22.5 dB, -20 dB and -18 dB for other output ports over 60 nm bandwidth centered at 1550 nm wavelength. (C) 2017 Optical Society of America
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