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Mach--Zehnder Interferometers with Asymmetric Modulation Arms in Applications of High Speed Silicon-on-Insulator Based Optical Switches |
| SUN Fei;YU Jin-Zhong |
| National Key Laboratory on Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083 |
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| Cite this article: |
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SUN Fei, YU Jin-Zhong 2006 Chin. Phys. Lett. 23 868-870 |
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Abstract Modulation arms with different widths are introduced to Mach--Zehnder interferometers (MZIs) to obtain improved performance. Theoretical analysis and numerical simulation have shown that when the widths of the two arms are properly designed to achieve an inherent mπ/2 (m is an odd integer) optical phase difference between the arms, the asymmetric MZI presents higher modulation speed. Furthermore, the carrier-absorption induced divergence of insertion losses in silicon-on-insulator (SOI) based MZI optical switches can be obviously improved.
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| Keywords:
42.82.Ds
42.82.Et
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Published: 01 April 2006
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| PACS: |
42.82.Ds
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(Interconnects, including holographic interconnects)
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42.82.Et
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(Waveguides, couplers, and arrays)
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