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

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.

 

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