Ulrich Fischer-Hirchert
Academic and Professional Background
Ulrich H. P. Fischer holds Diploma and PhD degree in Physics from the Free University
Berlin, Germany. In 2005 he achieved his lecture qualification in photonic packaging
technology at TU Dresden. He has been working on research positions in the Heinrich-
Hertz-Institute in Germany. Several international research projects have been performed
with European partners from France, Netherlands, Norway and the UK. He is currently
Professor of Optical Communications Systems at the Harz University of Applied Sciences,
Germany, and CEO of the HarzOptics GmbH.
Publications and Publishing
He has edited several books about Photonic Packaging techniques, holds several patents
and published more than 100 papers in international scientific journals.
Key Research and Consulting Interests
Ulrich’s research activity has always been related to Photonic Packaging and Optical
Communications Technology. He has been reviewer for several publications of the Optical
Society of America's including Photonics Technology Letters and Applied Optics and also
at the Deutsche Forschungs Gemeinschaft DFG.
Personal Interests
These include motor cycling and jogging.
Supervisors: Advisor
Ulrich H. P. Fischer holds Diploma and PhD degree in Physics from the Free University
Berlin, Germany. In 2005 he achieved his lecture qualification in photonic packaging
technology at TU Dresden. He has been working on research positions in the Heinrich-
Hertz-Institute in Germany. Several international research projects have been performed
with European partners from France, Netherlands, Norway and the UK. He is currently
Professor of Optical Communications Systems at the Harz University of Applied Sciences,
Germany, and CEO of the HarzOptics GmbH.
Publications and Publishing
He has edited several books about Photonic Packaging techniques, holds several patents
and published more than 100 papers in international scientific journals.
Key Research and Consulting Interests
Ulrich’s research activity has always been related to Photonic Packaging and Optical
Communications Technology. He has been reviewer for several publications of the Optical
Society of America's including Photonics Technology Letters and Applied Optics and also
at the Deutsche Forschungs Gemeinschaft DFG.
Personal Interests
These include motor cycling and jogging.
Supervisors: Advisor
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Papers by Ulrich Fischer-Hirchert
One solution is to use the wavelength division multiplexing (WDM) technique. Here, several different wavelengths can carry information over one POF fiber. All wavelengths that are transmitted over the fiber, must be separated at the receiver to regain and redirect the information channels. These separators are so-called Demultiplexers. There are several systems available on the market, which are all afflicted with certain disadvantages. But all these solutions have one main disadvantage, they are all too expensive for most of the applications mentioned above.
So the goal of this study is to develop an economical Demultiplexer for WDM transmission over POF. The main idea is to separate the chromatic light in its monochromatic components with the help of a prism with low reciprocal dispersive power. The prism and the other assemblies, which are needed to adjust the optical path, should be manufactured in injection molding technique. This manufacturing technique is a very simple and economical way to produce a mass production applicable POF-Demultiplexer.
One solution is to use the wavelength division multiplexing (WDM) technique. Here, several different wavelengths can carry information over one POF fiber. All wavelengths that are transmitted over the fiber, must be separated at the receiver to regain and redirect the information channels. These separators are so-called Demultiplexers. There are several systems available on the market, which are all afflicted with certain disadvantages. But all these solutions have one main disadvantage, they are all too expensive for most of the applications mentioned above.
So the goal of this study is to develop an economical Demultiplexer for WDM transmission over POF. The main idea is to separate the chromatic light in its monochromatic components with the help of a prism with low reciprocal dispersive power. The prism and the other assemblies, which are needed to adjust the optical path, should be manufactured in injection molding technique. This manufacturing technique is a very simple and economical way to produce a mass production applicable POF-Demultiplexer.
Da eine manuelle Messung nur für eine begrenzte Anzahl von LEDs ökonomisch sinnvoll ist, liegt es nahe, den Messprozess zu automatisieren. Eine solche Automatisierungslösung wurde von der HarzOptics GmbH in Kooperation mit der RG Elektrotechnologie GmbH zwischen 2007 und 2008 entworfen und realisiert und wird ebenfalls in diesem Paper vorgestellt.
Abschließend soll gezeigt werden, welche Herausforderungen bei der automatisierten LED-Vermessung in den kommenden Jahren noch zu überwinden sind und mit welcher Marktentwicklung gerechnet wird.