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Distributed fibre-optic temperature and strain measurement with extremely high spatial resolution

13.11.2012 - Photonik international /2012

"Scanning the Rayleigh scattering along a length of optical fibre enables a distributed sensor system where every point along the fibre acts as a sensor. This novel metho...
[ read more ] | [ deutsche Version lesen ] 

This technical articel is also under the category: Optical Metrology

Asymmetric fused fibre coupler consisting of different single-mode glass fibres

13.11.2012 - Photonik international /2012

Fused fibre couplers either combine or separate optical signals of different wavelength in telecommunications, laser development, and biomedical optics. Here, we report o...
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This technical articel is also under the category: Laser Sources

Guide structures for splicing single-mode fibres fabricated using deep lithography

12.11.2009 - Photonik international 2/2009

Deep lithography is used for cost-efficient fabrication of a precise guide structure for aligning single-mode fibres. Subsequent splicing, of the fibres positioned with t...
[ read more ] | [ deutsche Version lesen ] 

This technical articel is also under the category: Manufacturing of Optics

Red VCSELs for high-speed data communication via POF

12.03.2009 - Photonik international 1/2009

For efficient data communication via polymer optical fiber (POF) the emission wavelength of vertical cavity surface emitting semiconductor lasers (VCSELs) has to be adjus...
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This technical articel is also under the category: Laser Sources

Scaling capacity and functionality in large-scale photonic integrated circuits

14.11.2008 - Photonik international 2/2008

While large scale integrated circuits have revolutionised the electronics industry, the optical components industry has been surprisingly slow to recognise the benefits t...
[ read more ] | [ deutsche Version lesen ] 

This technical articel is also under the category: Electronics

40 Gbit/s directly modulated lasers become reality

12.03.2008 - Photonik international 1/2008

Optical Telecommunication requires semiconductor injection lasers with emission wavelengths around 1.3 µm and 1.55 µm. Here, good semiconductor lasers can be directly mod...
[ read more ] | [ deutsche Version lesen ] 

This technical articel is also under the category: Laser Sources

Intelligent light guiding with structured optical fibres

12.03.2008 - Photonik international 1/2008

Microstructures and nanostructures can change the optical properties of materials. In optical fibres the optically important parameters can be influenced in many ways wit...
[ read more ] | [ deutsche Version lesen ] 

Multiplexing for innovative mass communications applications

12.03.2008 - Photonik international 1/2008

To providers of mass communications, components have to be cost-effective as well as space saving. Therefore, the development of CWDM multiplexers from daisy-chained GRIN...
[ read more ] | [ deutsche Version lesen ] 

This technical articel is also under the category: Optical Components

Specialty fibres for light transmission from UV to IR

15.03.2007 - Photonik international /2007

The transmission properties of a glass fibre are predominantly determined by its content of hydroxide ions (OH–). Fibres with a high OH-content feature very good transmis...
[ read more ] | [ deutsche Version lesen ] 

The roadmap to next generation Ethernet:100-Gigabit-Ethernet with integrated optical-electrical high-speed circuits

15.03.2007 - Photonik international /2007

Communication networks have to be further evolved to cope with the continuously increasing data traffic. The most promising option is the scaling from the current 10 Gb/s...
[ read more ] | [ deutsche Version lesen ] 

This technical articel is also under the category: Electronics

Frequency combs and frequency dissemination for scientific and industrial applications

15.03.2007 - Photonik international /2007

Optical frequency combs enable us to count oscillations of visible light with unprecedented precision. The invention that formed a basis for the patented frequency comb t...
[ read more ] | [ deutsche Version lesen ] 

This technical articel is also under the category: Laser Technology

New applications for integrated optical devices

15.03.2007 - Photonik international /2007

Apart from the well-known applications in optical telecommunications, new technology for rapid modulation of high power light as well as for ultra-short pulse generation ...
[ read more ] | [ deutsche Version lesen ] 

This technical articel is also under the category: Optical Components

Large-scale photonic circuits become practical reality

04.05.2006 - Photonik international /2006

The practical development of large-scale photonic integrated circuits (PICs) has allowed the consolidation of many devices and functions into a single optical component. ...
[ read more ] | [ deutsche Version lesen ] 

This technical articel is also under the category: Electronics

Quantum well-, quantum dot-, and quantum cascade lasers with DFB-gratings

04.05.2006 - Photonik international /2006

Quantum wells are thin semiconductor layers typically with a thickness in the nanometer range and embedded within a semiconductor matrix. These pre­cisely controllable la...
[ read more ] | [ deutsche Version lesen ] 

This technical articel is also under the category: Laser Sources

Asymmetrische Faserkoppler aus unterschiedlichen Singlemode-Glasfasern

15.05.2012 - Photonik 3/2012

Faserbasierte Schmelzkoppler vereinen oder trennen optische Signale unterschiedlicher Wellenlänge in der Nachrichtentechnik, Laserentwicklung und biomedizinischen Optik. ...
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This technical articel is also under the category: Laser Sources

Verteilte faseroptische Temperatur- und Dehnungsmessung mit sehr hoher Ortsauflösung

13.12.2011 - Photonik 6/2011

Durch Abtasten der Rayleigh-Streuung entlang einer Standardglasfaser lässt sich ein verteilt messendes Sensorsystem realisieren, bei dem jeder Faserpunkt als Sensor wirkt...
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This technical articel is also under the category: Optical Metrology

Tiefenlithographie zum Spleißen von Singlemodefasern

16.10.2008 - Photonik 5/2008

Über Tiefenlithographie lassen sich günstig und präzise Faserführungsstrukturen herstellen, die sich für ein alternatives Spleißverfahren für Singlemodefasern eignen. Die...
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This technical articel is also under the category: Manufacturing of Optics

Skalierbarkeit und Funktionalität großflächig integrierter photonischer Schaltkreise

17.04.2008 - Photonik 2/2008

Großflächig integrierte Schaltungen (Integrated Circuits, ICs) haben die Elektronikindustrie revolutioniert. Die Hersteller optischer Komponenten haben dagegen erst ersta...
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This technical articel is also under the category: Electronics

Rote VCSEL für Hochgeschwindigkeits-Datenübertragung über POF

14.02.2008 - Photonik 1/2008

Für die effiziente Datenübertragung über optische Polymerfasern muss die Wellenlänge vertikal emittierender Halbleiterlaser, bekannt als VCSEL, an das Dämpfungsminimum de...
[ read more ]

This technical articel is also under the category: Laser Sources

Innovative Multiplexing-Technik für Massenkommunikations-Anwendungen

16.10.2007 - Photonik 5/2007

Für Anbieter von Massenkommunikations-Produkten müssen Komponenten kostengünstig und platzsparend sein. Daher war es notwendig, statt CWDM-Multiplexern mit hintereinander...
[ read more ]

This technical articel is also under the category: Optical Components

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