期刊
OPTICS EXPRESS
卷 21, 期 14, 页码 16331-16336出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.21.016331
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- Nanyang Technological University [NTU-SUG-M4080142 MOE RG24/10, RG24/10 MOE Tier 1]
- A*STAR Institute of Microelectronics
- Science and Engineering Research Council of Agency for Science, Technology and Research, Singapore under the SERC grant [1021740174]
We observe that the cascaded typical Y junctions will introduce unwanted periodic fringes over the spectrum in practical systems when they link with multimode waveguides. To solve the problem, we design and experimentally demonstrate a wavelength insensitive multimode interferometer (MMI) based 3-dB splitter which has all the merits of Y-splitters such as polarization insensitivity and ultra-compactness. The splitter has a footprint of 1.5 x 1.8 mu m(2), nearly one order smaller than the previously reported MMI splitters. The measured excess losses for TE and TM modes at telecom wavelength are as low as -0.11 dB and -0.18 dB respectively. (C) 2013 Optical Society of America
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