| Project/Area Number |
26630152
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
Koyama Fumio 東京工業大学, 精密工学研究所, 教授 (30178397)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | 光通信 / 光インターコネクト / 波長分割多重方式 / 光スイッチ / 光通信システム / 光ビーム掃引 / ビーム掃引 |
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| Outline of Final Research Achievements |
A wavelength selective switch (WSS) was proposed based on a Bragg reflector waveguide array, which has a small footprint. We demonstrated arbitrary switching among 182 output-ports by using a liquid crystal on silicon (LCOS) as a switching engine. Wavelength selective switching of 60 channels was carried out, exhibiting the device’s excellent capability in providing ultra-large number of port-count and wavelength-channel operations at the same time. The crosstalk between adjacent ports are below -20dB by a suitable alignment, which can be further improved by optimizing the module optics and alignments. The flexible lithography-defined waveguide array design also reveals versatile potentials in integrating with other functional components. We also fabricated a 1550nm-band wavelength selective element, exhibiting a beam deflection angle from 19 to 38° with a beam divergence of 0.2-0.5° for wavelength changes of 1400-1500nm.
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