標題: Tens of GHz Tantalum pentoxide-based micro-ring all-optical modulator for Si photonics
作者: Wu, Chung-Lun
Hsieh, Cheng-Hsuan
Lin, Gong-Ru
Chi, Wen-Chun
Chiu, Yi-Jen
Lin, Yuan-Yao
Hung, Yung-Jr
Shih, Min-Hsiung
Chu, Ann-Kuo
Lee, Chao-Kuei
光電工程學系
Department of Photonics
公開日期: 1-Mar-2017
摘要: A tantalum pentoxide-based (Ta2O5-based) micro-ring alloptical modulator was fabricated. The refractive index inside the micro-ring cavity was modified using the Kerr effect by injecting a pumped pulse. The transmittance of the ring resonator was controlled to achieve all-optical modulation at the wavelength of the injected probe. When 12 GHz pulses with a peak power of 1.2 W were coupled in the ring cavity, the transmission spectrum of the Ta2O5 resonator was redshifted by 0.04 nm because of the Kerr effect. The relationship between the modulation depth and gap of the Ta2O5 directional coupler is discussed. An optimized gap of 1100 nm was obtained, and a maximum buildup factor of 11.7 with 84% modulation depth was achieved. The nonlinear refractive index of Ta2O5 at 1.55 mu m was estimated as 3.4 x 10(-14) cm(2)/W based on the Kerr effect, which is almost an order of magnitude higher than that of Si3N4. All results indicate that Ta2O5 has potential for use in nonlinear waveguide applications with modulation speeds as high as tens of GHz.
URI: http://dx.doi.org/10.1002/andp.201600358
http://hdl.handle.net/11536/145367
ISSN: 0003-3804
DOI: 10.1002/andp.201600358
期刊: ANNALEN DER PHYSIK
Volume: 529
Appears in Collections:Articles