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Researchers from Belgium, the Netherlands, France and the US have demonstrated how telecom equipment designers can significantly increase the capacity of their electrical backplanes. Their unique backplane materials result in a transmission rate of 42.8 Gbit/s, which is almost twice the rate previously recorded.
To provide high optical power and high beam quality at the same time, researchers in Poland have applied similar concepts used in nitride lasers to tapered semiconductor laser devices. The design will be significant for medical instruments such as endoscopes, colour display systems, and printing applications.
Researchers in Japan have proposed a folded waveguide and suspended ridge structure to improve the performance of a thermo-optic switch. The switch achieves a 1/3 power reduction with this simple design change, increasing the efficiency of WDM optical networks, as well as reducing their size.
An antenna system for microwave non-invasive hyperthermia lipolysis is presented in work from Korea. The design incorporates a cooling system and waveguide antenna using a high-order mode, and is able to heat the subcutaneous fat layer without damage to the surrounding skin and muscle. The researchers believe the proposed antenna could also be applied to treatment of superficial cancers and breast cancer.
20 Gbit/s error-free operation of 850 nm VCSELs beyond 1 km of multimode fibre is reported by researchers in Sweden. The result is the highest bit rate distance product for a link employing a directly modulated VCSEL and multimode fibre, useful for applications such as data centres, which require high bit rate data links over significant distances on a large site.