A cover article of the January 2019 issue of Nature Photonics, a highly-referenced journal in the field of photonics, describes a chip-scale Brillouin laser capable of emitting light with a fundamental linewidth of less than 1 Hz - narrow enough to move demanding scientific applications to the chip scale.
Cátia Pinho a fellow researcher from IT in Aveiro contributed to this work in the scope of a scientific research mission under her Ph.D. studies at the Optical Communications and Photonic Integration (OCPI) group from the University of California, Santa Barbara (UCSB) advised by Daniel Blumenthal, Professor of Department of Electrical and Computer Engineering at UCSB.
Spectrally pure lasers, the heart of precision high-end scientific and commercial applications, are poised to make the leap from the laboratory to integrated circuits. Translating this performance to integrated photonics will dramatically reduce cost and footprint for applications such as ultrahigh capacity fibre and data centre networks, atomic clocks and sensing. The demonstrated sub-hertz fundamental linewidth Brillouin laser translates advantages of non-integrated designs to the chip scale. Single- and multiple-frequency output operation provides a versatile low phase-noise solution, highlighted by the demonstration of an optical gyroscope and a low-phase-noise photonic oscillator.
Cátia Pinho is currently finalizing her Ph.D. from the MAP-tele Doctoral Programme in Telecommunications at the University of Aveiro, supervised by António Teixeira and Mário Lima, Professors of the Department of Electronics, Telecommunications and Informatics (DETI) of University of Aveiro and senior researchers from IT.
Daniel Dinis, who recently concluded his PhD in Telecommunications at University of Aveiro (UA) hosted by IT, supervised by Arnaldo Oliveira and José Vieira (Both from IT/UA), received an honorable mention in this years´ edition of the IBM Scientific Award.
Since its first edition in 1990, this award is attributed every year by IBM Portugal to a young Portuguese researcher to distinguish works of high merit in the field of Computer Science.
The work that got Daniel the honorable mention is entitled “Real-time Tunable Delta-Sigma Modulators for All-Digital RF Transmitters”, and was developed in collaboration with researchers from Mitsubishi Electric Research Laboratories (Cambridge, MA, USA), namely Dr. Rui Ma, Principal Researcher. Daniel is currently a Radar Front-End Engineer at Thales Nederland B.V., in The Netherlands, which prevented him from attending the event. However through a video presentation played during the ceremony he got to explain the lines that oriented the work developed within his PhD. “The 5G is the next generation of mobile communications. Some of the most innovative features include the use of a massive number of radios in the base stations, peak data transmission rates in the order of Gbps, with low latency and a high density of mobile devices. However, previous generations cannot be ignored by encouraging the design of new flexible and highly integrated radio transceivers. The thesis proposes flexible and software-defined radio architectures capable of supporting high-bandwidth and multi-band signal transmission. Unlike conventional approaches based on digital-to-analog converters and analog conversion systems, the proposed architectures have a fully digital radio datapath from baseband up to the RF stage, which enables the design and development of highly-integrated radio systems”, explained Daniel.
The 28th award ceremony of the IBM Science Award was chaired by President Marcelo Rebelo de Sousa, in Instituto Superior Técnico (IST), Lisbon, this January 16, who handed the diploma to this edition´s winner Marija Vranic from the Instituto de Plasmas e Fusão Nuclear. Maria Vranic thus succeeds to Caroline Conti, the last year´s winner of the €15k award, whose PhD was accomplished at ISCTE-IUL hosted by IT.
Besides President Marcelo Rebelo de Sousa, there were also interventions of other high-profile personalities such as the Minister of Science, Technology and Higher Education, Manuel Heitor, the President of IBM Portugal, António Raposo de Lima, the President of IST, Arlindo de Oliveira and the President of the Jury and also the President of IT, Carlos Salema.
Photo: Daniel during his video presentation