| Presentation | 2012-04-06 InGaAs Potential-Tailored Quantum Well Mach-Zenhder Modulator Taro ARAKAWA, Yasuo KOKUBUN, |
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| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A five-layer asymmetric coupled quantum well (FACQW) is a potential-tailored quantum well suited for high-performance optical modulators and switches. It is expected to exhibit a large elecrtrorefractive index change in a transparency wavelength region. In this study, we have fabricated a Mach-Zehnder (MZ) optical modulator with the InGaAs/InAlAs multiple FACQW in a core layer and obtained a low-voltage DC operation (V_πL=1.2 Vmm) at the wavelength of 1.55 μm. The large refractive change is mainly due to a unique quantum confined Stark effect (QCSE) in the FACQW. In addition, we have proposed and fabricated an InGaAs/InAlAs FACQW microring MZ modulator (MR-MZ). The driving voltage of the proposed modulator is expected to be reduced markedly by the phase shift enhancement effect in the microring resonator. The driving voltage and the extinction ratio of the fabricated MR-MZ modulator were approximately 3.5 V and 27 dB at the wavelength of 1.55 μm, respectively. Its product of a half-wave voltage and a phase shifter length V_πL was successfully reduced to one-fourth that of a conventional MZ modulator with the same waveguide structure. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Mach-Zehnder modulator / Quantum well / InGaAs / QCSE / Electro-optic effect / Microring resonator |
| Paper # | MWP2012-5 |
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| Conference Information | |
| Committee | MWP |
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| Conference Date | 2012/3/30(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Microwave and Millimeter-wave Photonics (MWP) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | InGaAs Potential-Tailored Quantum Well Mach-Zenhder Modulator |
| Sub Title (in English) | |
| Keyword(1) | Mach-Zehnder modulator |
| Keyword(2) | Quantum well |
| Keyword(3) | InGaAs |
| Keyword(4) | QCSE |
| Keyword(5) | Electro-optic effect |
| Keyword(6) | Microring resonator |
| 1st Author's Name | Taro ARAKAWA |
| 1st Author's Affiliation | Graduate School of Eng., Yokohama National Univ.() |
| 2nd Author's Name | Yasuo KOKUBUN |
| 2nd Author's Affiliation | Graduate School of Eng., Yokohama National Univ. |
| Date | 2012-04-06 |
| Paper # | MWP2012-5 |
| Volume (vol) | vol.112 |
| Number (no) | 1 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |