Hashemi Talkhooncheh, Arian and Zhang, Weiwei and Wang, Minwo and Thomson, David J. and Ebert, Martin and Ke, Li and Reed, Graham T. and Emami, Azita (2022) A 2.4pJ/b 100Gb/s 3D-integrated PAM-4 Optical Transmitter with Segmented SiP MOSCAP Modulators and a 2-Channel 28nm CMOS Driver. In: 2022 IEEE International Solid- State Circuits Conference (ISSCC). IEEE , Piscataway, NJ, pp. 284-286. ISBN 9781665428002. https://resolver.caltech.edu/CaltechAUTHORS:20220407-503740421
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Abstract
Data centers continue to require interconnects with higher bandwidth densities and energy efficiencies. Silicon photonics (SiP)-based solutions have gained interest for implementing low-cost and power efficient 100+Gb/s/A optical transceivers. While microring modulators (MRMs) have small footprints and high electro-optical bandwidth (EOBW), they suffer from an inherent tradeoff between bandwidth and optical phase efficiency, high sensitivity to process and temperature variations, and non-linear electro-optic characteristics [1 – 2]. Travelling-wave Mach-Zehnder Modulators (TW-MZMs) require power-hungry drivers to compensate microwave losses and occupy large areas on chip [3 – 4]. Metal-oxide-silicon-capacitor (MOSCAP)-based phase modulators can significantly scale the area and power of the optical transmitter (OTX) owing to their superior optical efficiency (voltage-length product at n phase shift of V π L < 1Vmm) and compact footprint (< 1mm) [5]. MOSCAP modulators, however, impose large capacitive parasitics (~3fF/μm), which could limit the electro-optical bandwidth (EOBW) significantly. State-of-the-art wireline transmitters cannot meet the requirements of MOSCAP modulators due to their 50Ω-terminated design and limited output voltage swing [6]. This paper presents a 3D-integrated 100Gb/s PAM-4 OTX with electronic pre-distortion (PD) and BW extension techniques to compensate for MOSCAP modulator BW limitations.
| Item Type: | Book Section | ||||||||||
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| Additional Information: | © 2022 IEEE. The authors would like to thank Aaron Zilkie, Roshanak Shafiha, David Nelson and other team members at Rockley Photonics for their continuous technical support and funding. | ||||||||||
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| DOI: | 10.1109/isscc42614.2022.9731563 | ||||||||||
| Record Number: | CaltechAUTHORS:20220407-503740421 | ||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20220407-503740421 | ||||||||||
| Official Citation: | A. H. Talkhooncheh et al., "A 2.4pJ/b 100Gb/s 3D-integrated PAM-4 Optical Transmitter with Segmented SiP MOSCAP Modulators and a 2-Channel 28nm CMOS Driver," 2022 IEEE International Solid- State Circuits Conference (ISSCC), 2022, pp. 284-286, doi: 10.1109/ISSCC42614.2022.9731563. | ||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||
| ID Code: | 114186 | ||||||||||
| Collection: | CaltechAUTHORS | ||||||||||
| Deposited By: | George Porter | ||||||||||
| Deposited On: | 07 Apr 2022 09:58 | ||||||||||
| Last Modified: | 24 Oct 2022 23:21 |
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- Hashemi Talkhooncheh, Arian and Zhang, Weiwei and Wang, Minwo and Thomson, David J. and Ebert, Martin and Ke, Li and Reed, Graham T. and Emami, Azita A 2.4pJ/b 100Gb/s 3D-integrated PAM-4 Optical Transmitter with Segmented SiP MOSCAP Modulators and a 2-Channel 28nm CMOS Driver. (deposited 07 Apr 2022 09:58) [Currently Displayed]
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