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.
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.
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 firstname.lastname@example.org
Carmen Teutsch | Wiley-VCH
Melting solid below the freezing point
23.01.2017 | Carnegie Institution for Science
An innovative high-performance material: biofibers made from green lacewing silk
20.01.2017 | Fraunhofer-Institut für Angewandte Polymerforschung IAP
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...
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...
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...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
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...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
24.01.2017 | Physics and Astronomy
24.01.2017 | Life Sciences
24.01.2017 | Health and Medicine