Abstracts
STREAM 5: Data Centres Thursday 13:30 -15:00
A micromirror array- based streak camera for multi- channel, multi-spectral LIDAR David Benton, Senior research fellow, Aston University
Session Chair: Fotini Karinoui, Principal Researcher, Microsoft Research
Micromirror arrays have found extensive use as spatial light modulators in consumer electronics within digital projectors. An underused quality of these devices is the speed with which they switch between binary positions of -12 degrees
and + 12 degrees. With a simple camera we can make use of the transition between states to access temporal dispersion resulting in a novel LIDAR concept. In addition, the diffractive nature of the device enables simultaneous spectral dispersion to be obtained making the LIDAR multispectral. The free space nature of the device further enables separate input channels to be imaged thus multiple independent multispectral LIDARs can be interrogated in parallel. In this talk multiple lasers of different wavelengths have been used to demonstrate all these concepts with a result of temporal resolution 5 orders of magnitude faster than the device operating timescales. PANEL SESSION: Could the UK stand up an industrial- scale semiconductor fab for future optical and quantum networks? Thursday 11:00 - 12:30 The demand for photonic integration is likely to grow exponentially with a plethora of use cases from high speed transport, intra-Data Centre to more esoteric applications including quantum: With many of the industrial scale semiconductor fabrication capabilities being hosted in the Far East, what is the opportunity in the UK? Would the start-up costs to build UK based fabs be simply too prohibitive? Is there a niche middle way, for example focusing on compound materials? Our expert and widely experienced panellists will explore the art of the possible and aim to produce concrete recommendations in this vital area for future growth.
Cloud-scale archival data storage using ultrafast lasers Patrick Anderson, Microsoft Research
Recent advancements in ultrafast laser technology and material processing techniques have led to the realization of high-density data storage in fused silica. The exceptional properties of this storage media, combined with our clean-slate approach to designing and engineering systems
could revolutionize archival cloud storage. In this talk I will describe the motivation for our work, before giving insight into how ultrafast laser pulses can interact with materials to form intricate polarization sensitive nanostructures – the properties of which can be interrogated via high-resolution polarization microscopy.
Optical Networks for ML Systems George Zervas, UCL
Developing network solutions for ML systems is a multi-dimensional problem. The talk will cover the requirements, challenges and opportunities of optical networks for Machine Learning Systems. I will briefly delve into the role and dependencies between optical switching technologies, topologies and system architectures, control, and collective operations to ML training.
Application of Photonic Crystal Surface Emitting Lasers in Optical Communications Richard Hogg, Aston Institute of Photonic Technologies
Panel speakers:
The photonic crystal surface emitting laser (PCSEL) is emerging as a new class of laser diode. Feedback is obtained through a large two-dimensional 2nd order photonic crystal layer close to the intrinsic region of the laser diode.
By contrast to Fabry-Perot, VCSEL, and DFB geometries, where gain, feedback, and emission are co-axial, the PCSEL has in-plane gain and feedback, yet out-of-plane emission. This results in a different set of device design trade-offs, and offers surface emission at essentially any wavelength served by edge-emitting lasers. Many of the benefits of edge emitting and surface emitting lasers can be combined. I will explore recent developments in GaAs (~1um) and InP-based PCSELs (1.3 and 1.55um), focussing on possible future applications in optical communications. The opportunities for amplitude and frequency modulation, and high power single-mode emission will be outlined. Future challenges for the technology will be discussed that need to be addressed to allow this novel component to reach its full potential.
Chair: Jose Pozo (Optica)
James Regan (Oriole Networks)
Michael Wale (UCL)
Ning Zhang (CSA Catapult)
Iain Mauchline (Innovate UK)
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