OpTeC sponsors a colloquium throughout the academic year. This is a forum where a wide range of optical science and engineering topics are discussed at a level that can be understood by a broad spectrum of optics students, staff, and faculty. The primary purposes are to train students to give effective scientific talks and to promote cross-disciplinary interactions of students, staff, faculty, and local industry employees. Speakers include MSU students, staff, and faculty, and visitors from external universities, research labs, and companies.

Join our colloquium on

Thursday, November 30 at 4:10 pm.

Norm Asbjornson Hall, Room 165

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Packaging Technologies of Integrated Photonics for Quantum Technology 

Stefan Heinemann, Phix, North America


Quantum Technology is based on photonic packages that combine active semiconductors generating single-frequency radiation and photodetectors with photonic integrated circuits (PIC) for routing the photons and active components for modulating the photons. Typically, tens of individual single-mode channels must be precisely controlled for constant optical path length and sensitive, high-frequency feedback loops are deployed. Integrated photonic packages must be designed to properly manage the temperature distribution between passive and active optical elements and dissipate heat properly. The routing of electrical DC and RF drive currents, as well as sensitive RF sense currents, must be laid out for minimal interference. Consistent high optical coupling efficiency of all optical channels is vital for performance.

We will review the state of the art for design and execution of integrated photonic packages. Consistent, high-quality die and wire bonding is routinely performed at our facility. We will report on our technologies for high-efficiency optical coupling between semiconductors and fiber arrays (FAU) or photonic integrated circuits (PIC) that include butt coupling, integrated spot-size converters made by ion exchange, and nanoimprinted lenses that also enable surface coupling. We will also present our demonstrator made on an 8” wafer with more than 3,000 electrical connections.

Biographical Sketch

Stefan Heinemann recently took the position of VP of Sales for Phix, North America. Phix US is currently established and will support customers in North America in their production and development of integrated photonic platforms. He joined from Aurora, the autonomous trucking company where he led the team for opto-mechanical engineering of the First Light Lidar product and the packaging efforts for next-generation Lidar on the Chip, both enabling coherent 4D detection up to 400 m. Before that, he managed the development of a high-power diode laser product line and the technology development team at TRUMPF Photonics, which is part of the TRUMPF Group, a worldwide operating provider of laser machine tools. Before his appointment at TRUMPF, he was the director at Fraunhofer USA, Center for Laser Technology, where he developed and commercialized novel production technologies with light serving academia, federal agencies, and industry. He started his professional career at JENOPTIK in Jena, Germany.

He co-founded four companies in lasers and renewable energy, holding positions as CEO and CTO. He initiated the alliance for Clean Transportation, a private-public partnership of the University of Michigan, Fraunhofer, and industry.

He earned a diploma in Physics from the Technical University of Munich and a Ph.D. in electrical engineering from the Technical University of Berlin. He holds 68 patents and has more than 150 published works.


Past Speakers

Date Speaker Group Summary

Allison Barto

Ball Aerospace

Engineering Discovery: Building NASA's James Webb Space Telescope


Thomas Coleman

Silixa, LLC

Fiber optic distributed sensing for environmental and infrastructure monitoring


John Howell

Chapman University

Doppler Gyroscopes: Do we really understand the gyroscope?


Krishna Rupavatharam, Ph.D.

Spectrum  Lab

Perspectives on the evolution of microwave and quantum photonics at Spectrum Lab


John W. Sheppard, Ph.D., FIEE

MSU Gianforte School of Computing

Demystifying machine learning through eXplainable AI


Finland Photonics

Finnish Photonics Cluster

Photonics in Finland


Nicholas Borys. Ph.D.

MSU Physics

An introduction to the MonArk NSF Quantum Foundry


Alex Hills

Carnegie Mellon University

Mitigating LEO-to-GEO satellite interference


Stephen Schultz

Brigham Young University, Electrical & computer Engineering

Dynamic measurement of soft body armor using optical fiber sensing


Bradley Whitaker

MSU Electrical & Computer Engineering

How machine learning can help scientists who shoot fish and insects with lasers


Tom Hausekn


Hot topics in optics and photonics


Jim Webb1 & Scott Wohlstein2 

1 G.L. Services, Hertfordshire, England
2 The Photonics Group,West Chester, OH

Using the LaserSafePC software for laser safety calculations 



Brian D'Urso 

MSU Physics Department

Towards precision pulsed levitated optomechanics in a magneto-gravitational trap


Wataru Nakagawa

MSU ECE Department

Nanophotonics Applications and Sabbatical Exploration



Nathan Kuehl

Bryan Scherrer

MSU Physics and ECE Dep'ts Kuehl: Troubleshooting, repair and calibration of Burleigh WA-1500 Wavemeter.

Scherrer: Model and simulation of wing-beat modulation lidar for making 3D maps of flying insects .

11/19/2020 Dr. Charles Kankelborg MSU Physics Department

Designing a far ultraviolet spectrometer for the sun as a starAbstract

11/12/2020 Dr. Ioannis Roudis MSU ECE Department  Nonlinear noise in coherent optical communications systems    Abstract
4/09/2015 Dr. James G. Wessel Seagate Corporation Hard Disc-Drive Recording
3/19/2015 Dr. Jake Jacobsen Synopsys, Optical Solution Group A review of optical design software at Synopsys
2/05/2015 Dr. Mark A. Wistey ECE Department, University of Notre Dame Paths to record lasers and solar cells--and on cheap silicon
11/24/2014 Dr. Olav Solgaard ECE Department, Stanford University Miniaturized endoscopes and implantable sensors for in-vivo studies of cancer biology
11/6/2014 Dr. Kirk Knobelspiesse NASA Ames Research Center Cloud thermodynamic phase detection with polarimetrically sensitive passive sky radiometers.
10/30/2014 Dr. Kris Merkel President & CEO S2 Corporation, Bozeman, MT S2 Extreme Bandwidth Analyzer and Correlator (EBAC):Updates on Improvements and Demonstrations
11/14/2013 Dr. Upendra Singh NASA Langley Research Center Development of a pulsed 2-micron integrated-path differential absorption lidar for CO2 measurements
10/31/2013 Qing Gu University of California - San Diego Semiconductor nanolasers for dense chip-scale integration
9/16/2013 Dr. Jim Schwiegerling College of Optical Sciences - University of Arizona Leading edge optics for optimizing vision
5/14/2013 Dr. John Egan Advanced Photonic Crystals The benefits of low temperature hydrothermal crystal growth
4/25/2013 Dr. Edwin ("Ted") Heilweil National Institute of Standards and Technology (NIST) Time-resolved terahertz studies of carrier dynamics in P3HT and zinc-phthalocyanine/C60 nanolayered thin films
2/26/2013 Dr. Larry Johnson and Dr. Mark Carroll Newport Corporation Part 1. Overview of laser diode technology and applications; Part 2. Job opportunities and desired skills for graduates at Newport/ILX Lightwave
2/8/2013 Dr. Toralf Scharf Institute of Microtechnology, Ecole Polytechnique Federale de Lausanne, Switzerland From achromatic microlenses to submicron focusing: physical optics at the micro-scale