Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Giant Optical Gain in a Rare-Earth-Ion-Doped Microstructure

09.01.2012
Prof. Markus Pollnau and co-workers at the MESA+ Institute for Nanotechnology at the University of Twente have developed a rare-earth-ion-doped optical amplifier with performance comparable to semiconductor amplifiers.
Signal amplification
Amplification of optical signals is critical in photonics applications. Semiconductor optical waveguide amplifiers have high gain per unit length (~1000 dB/cm), but suffer from spatial and temporal gain pattering effects.

In comparison, fiber amplifiers doped with trivalent rare-earth ions like Er3+ combine good overall gain with low noise and negligible non-linearities. However, this comes at the cost of having to use several meters of fiber length, making them unsuitable for on-chip applications.

By engineering the host material, dopant concentration, and geometry the MESA+ scientists were able to increase the modal gain per unit length of rare-earth-ion-doped waveguide amplifiers to ~1000 dB/cm.

As good as semiconductor amplifiers
“Our highest measured gain of 935 dB/cm is two orders of magnitude higher than previously demonstrated in any rare-earth-ion-doped amplifier and similar to the best results reported for semiconductor amplifiers,” says Dimitri Geskus, lead author on the paper.

The approach uses the family of monoclinic potassium double tungstates KY(WO4)2, KGd(WO4)2, and KLu(WO4)2. Yb3+ ions doped into these materials possess some of the highest transition cross-sections observed in dielectric materials.

Besides their applicability as on-chip amplifiers for high-bit-rate data transmission at signal wavelengths around 1 ìm, these new rare-earth-ion-doped amplifiers may be used to provide optical gain in nanophotonic devices, such as nanoamplifiers and nanolasers, and may enable lossless propagation in plasmonic nanostructures.

The research is reported in the first issue of Advanced Optical Materials, a new section in Advanced Materials (2010 IF: 10.880) dedicated to exploring light-matter interactions.

For more information on Advanced Optical Materials, visit www.advopticalmat.de.

The article is available at http://doi.wiley.com/10.1002/adma.201101781.

If you need further information or are interested in the pdf of the article please contact me at cteutsch@wiley-vch.de

Carmen Teutsch | Wiley-VCH
Further information:
http://www.wiley-vch.de

More articles from Materials Sciences:

nachricht Melting solid below the freezing point
23.01.2017 | Carnegie Institution for Science

nachricht An innovative high-performance material: biofibers made from green lacewing silk
20.01.2017 | Fraunhofer-Institut für Angewandte Polymerforschung IAP

All articles from Materials Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Scientists spin artificial silk from whey protein

X-ray study throws light on key process for production

A Swedish-German team of researchers has cleared up a key process for the artificial production of silk. With the help of the intense X-rays from DESY's...

Im Focus: Quantum optical sensor for the first time tested in space – with a laser system from Berlin

For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.

According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Breaking the optical bandwidth record of stable pulsed lasers

24.01.2017 | Physics and Astronomy

Choreographing the microRNA-target dance

24.01.2017 | Life Sciences

Spanish scientists create a 3-D bioprinter to print human skin

24.01.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>