Journal
OPTICS EXPRESS
Volume 25, Issue 7, Pages 8425-8439Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.25.008425
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- Natural Sciences and Engineering Research Council of Canada
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We demonstrate U-shaped silicon PN junctions for energy efficient Mach-Zehnder modulators and ring modulators in the O-band. This type of junction has an improved modulation efficiency compared to existing PN junction geometries, has low losses, and supports high-speed operation. The U-shaped junctions were fabricated in an 8 silicon photonics platform, and they were incorporated in travelling-wave Mach-Zehnder modulators and microring modulators. For the high-bandwidth Mach-Zehnder modulator, the DC V pi L at -0.5 V bias was 4.6 V (.) mm. It exhibited a 3dB bandwidth of 13 GHz, and eye patterns at up to 24 Gb/s were observed. A VpL as low as similar to 2.6 V(.)mm at a -0.5 V bias was measured in another device. The ring modulator tuning efficiency was 40 pm(.)V(-1) between 0 V and -0.5 V bias. It had a 3-dB bandwidth of 13.5 GHz and open eye patterns at up to 13 Gb/s were measured. This type of PN junctions can be easily fabricated without extra masks and can be incorporated into generic silicon photonics platforms. (C) 2017 Optical Society of America
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