Seminar of the Institute 2008

Prof. J. Leuthold; Prof. W. Freude

Location: NTI, Bldg. 30.10, Seminar-room 3.42
Time: Wednesday, 10:00

December 17, 2008 Amplifiers for Future Access Networks
Akhmet Tussupov (Intermediate Talk Masterthesis)

Experimental Characterization of Silicon-Organic-Hybrid (SOH)
Siegwart Bogatscher ( Talk Diploma Thesis)
December 10, 2008 Polarization Insensitive Cross-Phase Modulation in Highly Nonlinear Optical Fiber
Jörg Pfeifle, Schlussvortrag Studienarbeit

Thomas Schellinger

December 04 2008,
An easy introduction to plasmonics
W. Freude
December 03, 2008 Long Period Grating Refractive Index Sensor: Optimal design for single wavelength interrogation
Amita Kapoor

New Protocol for an Optically Powered Heterogeneous Sensor Network
Matthias Hoh (Intermediate Talk Studienarbeit)
November 26, 2008 Orthogonal frequency division multiplexing in phase and amplitude modulated WDM systems
Andreas Eisele (Bosch) about his master thesis at CREOL /USA

ATLAS: Scope and limitations with respect to inplementing ODSOAs.
Amita Kapoor
November19, 2008 Design of the Turbo Switch Schemes using bulk SOAs
Dhanamaya Kharki

QD SOA and other Amplifier for Metro and Access Networks
Akhmet Tussupov (Einführungstalk Masterthesis)
November 12, 2008 Waveguides for Ultrafast Modulators
Nicole Lindenmann
November 7, 2008

11.30 am
Diamonds in Washington, Volcanic Dust in Hawaii and Dark Matter: Optical Surface Metrology Using First Contact Polymers and the Preparation and Characterization of Nanographene
Professor James P. Hamilton,  Department of Chemistry and Engineering Physics
University of Wisconsin-Platteville, Platteville
November 5, 2008 Nonlinear Silicon-Organic Hybrid Waveguides
Christoph Heine (Final Talk)

"O-Band WDM for HFC Access Networks "
Sebastian Neuhäuser (Einführungsvortrag Diplomarbeit)
October 29, 2008; "130 Gbit/s Optical Clock Recovery"
David Hillerkuß (Final Talk Diplomarbeit)

"DPSK Regeneration: Phase and Amplitude Noise Suppression based on Kerr Medium "
Jordi Abril (Talk Master Thesis)

October 15, 2008; "Ultrafast Nonlinear Optics on a Chip"
Prof. Benjamin J. Eggleton, Director of Centre for Ultra-bandwidth Devices for Optical Systems (CUDOS),
Professor of Physics, University of Sydney, Australia
October 08, 2008; "APOC (Rehearsal talk ) "
Jingshi Li
October 01, 2008; "Erbium Doped Amplifiers and Long Period Gratings"
Amita Kapoor, University of Delhi, South Campus (Introductory Talk)

"Tunable diode-laser spectroscopy for trace-gas measurements with high sensitivity and low drift"
Dipl.-Ing. (FH) Christoph Dyroff
Forschungszentrum Karlsruhe, Institut für Meteorologie und Klimaforschung
September 10, 2008: Innovative Komponenten für Telekom- und Terahertz-Anwendungen
Dr. Bernd Sartorius, HHI Berlin, Germany

Nonlinear Silicon-Organic Hybrid Waveguides
Christoph Heine

Second Order Nonlinear Materials
Julian Groß (Studienarbeit)
September 3, 2008: kein Seminar
August 27, 2008; Receiver Software for Optical Vector Analyzer
Kai Worms (Studienarbeit - Zwischenvortrag)
August 13, 2008; "OFC 08 – Review" - Beginn 10.30 Uhr
A. Marculescu
July 16, 2008: "Quantum Dash Semiconductor Optical Amplifiers for Extended Passive Optical Network"
J. C. Rode (Final Talk Studienarbeit)
July 9, 2008: "OFC 08 – Review"
S. Sygletos
July 2, 2008: "FWM in Semiconductor Optical Amplifiers"
Akhmed Tussupov (Final Talk Studienarbeit)

"Entwurf Koplanarer Elektroden für Elektrooptische Modulatoren aus Silizium"
Simon Schneider (Zwischenvortrag Studienarbeit)



"Improved Labview Framework for Lab Automation"
Herr Baumann
June 25, 2008: kein Seminar
June 23, 2008
"Approaching the fundamental limit for the optical nonlinearity of small organic molecules: Towards a high optical quality supramolecular assembly for third-order integrated nonlinear optics"
Ivan Biaggio, Associate Professor of Physic, Lehigh University, US


June 18, 2008: Nonlinear Silicon-Organic Hybrid Waveguides
Christoph Heine (Einführungsvortrag Diplomarbeit)

"Implementation of an Optical Multiformat Transmitter "
Alexandra Ludwig (final talk)


"Design of DPSK Generators based on Kerr media "
Jordi Abril

"Parameters for optimized MIMO transmission over a multimode fiber"
Bakhyt Zupinov (final talk)
June 11, 2008: "High-Speed All-Optical TDM-to-WDM Conversion and Regeneration"
Philipp Vorreau


"Optical Clock Recovery and Demultiplexer"
David Hillerkuss (Einführungsvortrag Diplomarbeit)


"Detection of externally choppered signals in an ANDO optical spectrum analzyer"
Herr Baumann
June 4, 2008; "Development of a 1.3 um InAs quantum dot based semiconductor optical amplifier "
Shunfeng Li
June 3, 2008; (Tuesday) "Pattern Effect Mitigation Techniques for All-Optical Wavelength Converters Based on Semiconductor Optical Amplifiers "
Jin Wang
May 28 , 2008: "Design of a Measurement Setup and Measurement of Visible Light Emission from Reverse-Biased Integrated Silicon Diodes" (Studienarbeit)

"Performance Analysis of Phased Array Architectures at Millimeter Wave Frequencies"

Swen König


Abstract 1:

Visible white light emission by an integrated Si-diode with a defect engineered buried layer under moderate reverse bias was observed at the Institute of Semiconductor Engineering at the University of Stuttgart.
Spectral measurements of the emitted light of these diodes are challenging when using a common spectrometer due to small diode areas and low light intensities. Furthermore, the fiber coupling losses are critical at low intensities and most spectrometers are optimized to measure light in the infrared regime between 1000 nm and 1600 nm where optical fiber applications are working.

The result of this study work is an alternative low-cost measuring setup that allows to measure very low light intensities in the visible wavelength regime. It uses an avalanche photodiode (APD) as detector followed by a transimpedance amplifier. Spectral information of the emitted light is gained through the use color filters which are placed in the light path. The measuring setup allows both spectral and spatial measurements of the emitted light. The talk presents the working principle of the self-designed measurement setup and some measurement results.

Abstract 2:

Millimeter wave frequency applications have historically been expensive and reserved for non-consumer products and military use. Recent advances in silicon semiconductor technologies and the unprecedented allocation of several GHz of continuous, unlicensed spectrum, notably in the 60GHz band, have made this portion of the electromagnetic spectrum highly interesting for future wireless multi-gigabit applications.

Phased arrays, a multiple antenna system, allow electronically controlled beam steering and beam forming by proper phase adjustments.
Fundamental studies on the working principles and performance of phased array architectures at millimeter wave frequencies with focus on coupling, noise, and noise correlation are carried out. The radio frequency phase shifting architecture on the receiver side is considered in detail with focus on noise issues. A Matlab model that uses the concept of noise waves and scattering matrices to evaluate the system’s performance with respect to coupling effects and noise correlation is implemented. In view of the challenge of an architectural co-design, the antenna stage, the amplifier stage and the phase shifting part are incorporated in a common model.

The talk presents the major findings of the performed noise analysis of a 4-element phased array receiver. Furthermore, the tradeoffs of wireless communication systems at millimeter wave frequencies are illustrated in the context of Shannon capacity and the benefits of integrating phased arrays at such high frequencies are discussed.

May 21 , 2008: "Optically powered sensor platform"
(Arbeitstitel) "
Herrn Ruiwen Yang (KTH, Sweden)
May 14 , 2008: "Polarization Controller for Optical Communication Systems"
Siegwart Bogatscher (Endvortrag Studienarbeit)

"Quantum Dash Semiconductor Optical Amplifiers for Extended Passive Optical Network"
J. C. Rode (Einführungsvortrag Studienarbeit)

May 07, 2008: Title: "(1) Anomalies and Anderson localization: p-coupling of energy bands"
(2) "Generation and application of high power femtosecond pulses in the vibrational fingerprint region"

Dipl.-Phys. Luca Alloatti

Abstract of Part 1:
The conductance of quantum wires discretized on a lattice is studied by means of the Moeller operator. Some models of quantum wires show anomalies at the center of the energy spectrum (E=0). The Moeller operator allows to make important deductions about the role played by the Bloch angles on these anomalies. It is shown that when the average conductance is considered, the peaks appearing at E=0 are caused by a resonant effect of the energy bands (pi-coupling). New systems are found showing the same anomalies in different points of the spectrum.
Abstract of Part 2:
Sum Frequency Generation (SFG) is an important tool for examining structural properties of molecules at interfaces. In our laboratory in Stuttgart we can produce high power infrared ultrashort laser pulses allowing to perform SFG experiments in the fingerprint region. The laser system is described and results on poly-(L-lactic acid) (PLLA) are discussed.
April 30, 2008: No talk

April 23, 2008: "ECOC-Review"
P. Vorreau
April 16, 2008 "At last: Introduction to optics simulation with ZEMAX"
Dr. G. Böttger
April 09, 2008 (Title will be publication soon)
Prof. Grau
March 26, 2008 No talk
March 19, 2008: "ECOC-Review"
J. Brosi

"Introduction to optics simulation with ZEMAX"
G. Böttger
March 12, 2008: “Optimization of Red-Shifted Optical Filter in Semiconductor Optical Amplifier-based Wavelength Conversion”
Zenhao Zhang (Endvortrag Studienarbeit)


Jin Wang
March 5, 2008: "ECOC-Review"
Jingshi Li
February 27, 2008: - no seminar -
February 20, 2008: "ECOC-Review"
S.Li, R. Bonk
February 13, 2008: "High-speed data transmission over a MMF using a spatial multiplex" 
Bakhyt Zupinov (1. Zwischenvortrag Masterarbeit)

"Polarization Controller for Optical Communication Systems"

Siegwart Bogatscher (Zwischenvortrag Studienarbeit)

February 06, 2008: "ECOC-Review"
M. Röger
January 30, 2008: "ECOC-Review"
A. Marculescu
January 17, 2008
15:00 (Thursday)
Seminar-room 3.42
"Towards integration of quantum cryptography in nowadays telecom networks"
Frau Dipl.-Ing. Fotini Karinou

QC is the first field of quantum physics where applications will be realized in near future. One approach for quantum key distribution is to take advantage of the phenomenon of quantum entanglement.
In this work the first demonstration of combining quanta and classical signals was demonstrated with standard CWDM equipment.
This work that enables the entrance of Quantum Key Distribution of entangled photons in already existent optical networks was carried out at the Institute for Experimental Physics at the University of Vienna, at the Quantum Cryptography group of Prof. Anton Zeilinger under the supervision of Dr. Andreas Poppe.
January 16, 2008: "Optimization of Red-Shifted Optical Filter in Semiconductor Optical Amplifier-based Wavelength Conversion"
Zhenhao Zhang (Zwischenvortrag Studienarbeit)


January 14, 2008
11:45 (Montag)
Seminarraum 3.42
"Powermanagement in Energy Harvesting Anwendungen"
Dipl.-Ing. Peter Spies
Fraunhofer Institut Integrierte Schaltungen IIS Department Power Efficient Systems, Nürnberg

Spannungsanpassung, -regelung, Verlustleistungsminimierung, Energiespeicherung, Anwendungsbeispiel:
Thermoelektrische Sensordatenübertragung mittels Körperwärme; Ausblick: Kombination von Wandlern, Speichern und Elektronik als Mikrosystem
January 09, 2008: "Characterization of Fine Wires for Microelectronic Wire Bonding"
Dr. Michael Mayer

Bonding wires are used in the microelectronics industry to electrically connect integrated circuits. A typical bonding wire is 25 µm in diameter, consists of 99.99% Au and is doped with a variety of elements to improve the thermo-mechanical behaviour during service. As the International Technology Roadmap for Semiconductors (ITRS) directs the industry towards more miniaturized and higher reliability microelectronics, the bonding wire industry conducts research  to find improved wires by adjusting the drawing processes, wire materials, and dopants. In order to help assess the quality of new wires, characterization methods were developed at UW and are presented in this talk. The new methods use an automatic wire bonder and are designed to accelerate data collection.

Michael Mayer joined the University of Waterloo, Ontario, Canada, as an assistant professor for microjoining in 2004. His research focuses on the detailed understanding of the mechanisms of electronic packaging processes, in particular for microelectronics and microsystems, as well as on collaborating with industrial partners to  generate value through practical solutions to current technological challenges. Dr. Mayer received his MSc degree in Physics and PhD degree in Technical Sciences in 2000, both from ETH Zurich, Switzerland. He developed a novel family of CMOS microsensors for real-time feedback from microjoining processes. For this work he was awarded his PhD degree in 2000 and the ETH Medal in 2001. From 2000 to 2004 he was a senior R&D05.02.2009 9:49rded the ESEC Inventor of the Year Award in 2003.


Fruehere Vortraege aus 2006, 2007, 2008, 2009, 2010, 2011