Author: Helena

Ultra-High-Speed 2:1 Digital Selector and Plasmonic Modulator IM/DD Transmitter Operating at 222 GBaud for Intra-Datacenter Applications

Ultra-High-Speed 2:1 Digital Selector and Plasmonic Modulator IM/DD Transmitter Operating at 222 GBaud for Intra-Datacenter Applications


Heni, Wolfgang, et al. “Ultra-high-speed 2: 1 digital selector and plasmonic modulator IM/DD transmitter operating at 222 GBaud for intra-datacenter applications.” Journal of Lightwave Technology 38.9 (2020): 2734-2739.


Abstract:

We demonstrate a 222 GBd on-off-keying transmitter in a short-reach intra-datacenter scenario with direct detection after 120 m of standard single mode fiber. The system operates at net-data rates of >200 Gb/s OOK for transmission distances of a few meters, and >177 Gb/s over 120 m, limited by chromatic dispersion in the standard single mode fiber. The high symbol rate transmitter is enabled by a high-bandwidth plasmonic-organic hybrid Mach–Zehnder modulator on the silicon photonic platform that is ribbon-bonded to an InP DHBT 2:1 digital multiplexing selector.

Requiring no driving RF amplifiers, the selector directly drives the modulator with a differential output voltage of 622 mVpp measured across a 50 Ω resistor. The transmitter assembly occupies a footprint of less than 1.5 mm × 2.1 mm.

Ultra-High-Speed 2:1 Digital Selector and Plasmonic Modulator IM/DD Transmitter Operating at 222 GBaud for Intra-Datacenter Applications

Ultra-High-Speed 2:1 Digital Selector and Plasmonic Modulator IM/DD Transmitter Operating at 222 GBaud for Intra-Datacenter Applications

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Fig. 1. 222 GBd transmitter assembly consisting of an InP DHBT 2:1- digital selector (SEL) and plasmonic organic hybrid (POH) Mach–Zehnder modulator (MZM) on silicon photonics. The RF electrodes of the modulator are ribbon-bonded to the output stage of the SEL. The assembly requires less than 2.1 × 1.5-mm².

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100 GBd IM/DD transmission over 14 km SMF in the C-band enabled by a plasmonic SSB MZM

100 GBd IM/DD transmission over 14 km SMF in the C-band enabled by a plasmonic SSB MZM


Benedikt Baeuerle, Claudia Hoessbacher, Wolfgang Heni, Yuriy Fedoryshyn, Ueli Koch, Arne Josten, Delwin L. Elder, Larry R. Dalton, and Juerg Leuthold, “100 GBd IM/DD transmission over 14 km SMF in the C-band enabled by a plasmonic SSB MZM,” Opt. Express 28, 8601-8608 (2020)


Abstract:

100 Gb/s NRZ-OOK transmission over 14 km standard single mode fiber in the C-band is demonstrated with a simple intensity modulation and direct detection scheme. The transmission concept utilizes single sideband modulation and comprises a single differential digital-to-analog converter with adjustable phase offset, a new dual electrode plasmonic Mach-Zehnder modulator, a laser at 1537.5 nm, standard single mode fibers, a photodiode, an analog-to-digital converter, and linear offline digital signal processing. The presented SSB concept requires no DSP and complex signaling at the transmitter. The demonstrated SSB transmitter increased the possible transmission distance by a factor of 4.6 compared to a DSB transmitter. We also investigated the equalization requirements. A T/2-spaced feedforward equalizer requires 27 taps to achieve transmission over 10 km with a BER below the HD-FEC limit. In comparison to a DSB transmitter, the SSB transmitter reduced the receiver DSP complexity by a factor of 13.7.

© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

Optics Express

100 GBd IM/DD transmission over 14 km SMF in the C-band enabled by a plasmonic SSB MZM

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Fig. 1. Colorized microscope picture of the dual-electrode plasmonic Mach-Zehnder modulator (P-MZM). It comprises MZ interferometer with silicon photonic (SiP) waveguides (WGs) and SiP multimode interference (MMI) couplers and two plasmonic phase modulators. Light is coupled to and from the chip via SiP grating couplers (GC). The electrical signal is contacted via two ground (G) signal (S) contact pads.

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Transparent Optical-THz-Optical Link Transmission over 5/115 m at 240/190 Gbit/s Enabled by Plasmonics

Transparent Optical-THz-Optical Link Transmission over 5/115 m at 240/190 Gbit/s Enabled by Plasmonics


Horst, Yannik, et al. “Transparent optical-THz-optical Link transmission over 5/115 m at 240/190 Gbit/s enabled by plasmonics.” 2021 Optical Fiber Communications Conference and Exhibition (OFC). IEEE, 2021.


Abstract:

The first transparent Optical-THz-Optical link providing record-high line-rates up to 240 and 190 Gbit/s over distances from 5 to 115m is demonstrated. The link is based on direct data-conversion from optical to sub-THz and vice-versa.

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Interview with Yannik Horst:

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Low-Power Data Center Transponders Enabled by Micrometer-scale Plasmonic Modulators

Low-Power Data Center Transponders Enabled by Micrometer-scale Plasmonic Modulators


Baeuerle, Benedikt, et al. “Low-Power data center transponders enabled by Micrometer-scale plasmonic modulators.” Optical Fiber Communication Conference. Optical Society of America, 2020.

Abstract:

Plasmonic modulators allow for high-speed data modulation beyond 200 GBd at the micrometer-scale and low driving voltages below 700 mV. The compact footprint enables dense integration and makes plasmonic modulators a promising solution for next-generation optical interconnects.

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Chanel Docekal

Chanel joined Polariton last October as a “Management Assistant/ Operations Associate” while finishing her studies in business administration at the University of Zurich. At Polariton she is responsible for monitoring and improving internal processes, for developing, implementing and executing of a human resources and talent management process and is supporting the management for efficient corporate governance and business management. In addition to that she is supporting the Marketing, Sales & Business Development department. In September, she will begin her Master’s degree in General Management at the University of St. Gallen and continue to work part-time at Polariton.

In her free time Chanel likes to play tennis, go skiing and to do other outdoor activities. She also really likes to watch sports such as ice-hockey, football or formula 1.

Adrian Langenbach

He studied physics at ETH and during his masters he worked on a pulsed high power laser system that will be used for laser spectroscopy. A lot of skills he learned there are very applicable to the internship he is currently doing at Polariton Technologies. At Polariton he is working in the back end of line team to determine the reliability and persistence of our modules. In his free time he likes to do sports (volleyball, mountainbiking etc.) and he loves to sing. Therefore he is involved in a variety of choirs and other music projects.

Valentino Tedaldi

Valentino received his BSc and MSc degrees in Information Technology and Electrical Engineering from ETH Zurich, where he focused on photonics and electronics as well as optical communication.
During his studies, he already supported Polariton Technologies – first as a working student and later with his master thesis.
Valentino joined the company in July 2021 as a Packaging and Back-End Engineer, tackling the various challenges when going from chip level to module level and improving the long-term stability of our products.
His favourite leisure activity is best captured by a coworker’s comment: “Engineer by day, guitarist by night.” Apart from music, he is an avid skier, likes to squash, play hockey, and read books.

Christian Funck

Christian Funck received his M.S. degree in electrical engineering at ETH Zurich, Switzerland in 2016. His passion lies in the field of electromagnetics and photonics. After his degree, he worked in different R&D environments, including at SPEAG as an application engineer for electromagnetic sensors, and at University of Zurich, in medical device development. 

Christian joined Polariton in August 2020, and is currently part of the electromagnetic simulation team. 

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