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Published in

Optica, Optics Express, 6(22), p. 6674, 2014

DOI: 10.1364/oe.22.006674

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A 40 Gbit/s optical link on a 300-mm silicon platform

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We demonstrated 40Gbit/s optical link by coupling a silicon (Si) optical modulator to a germanium (Ge) photo-detector from two separate photonic chips. The optical modulator was based on carrier depletion in a pn diode integrated in a 950-µm long Mach-Zehnder interferometer. The Ge photo-detector was a lateral pin diode butt coupled to a silicon waveguide. The overall loss, which is mainly due to coupling (3 grating couplers times ~4 dB) was estimated to be lower than 18 dB. That also included modulator loss (4.9-dB) and propagation loss (<1dB/cm). Both optoelectronic devices have been fabricated on a 300-mm CMOS platform to address high volume production markets.