Femtosecond laser additive and subtractive micro-processing:enabling a high-channeldensity silica interposer for multicore fibre to silicon-photonic packaging

Great strides have been made over the past decade to establish femtosecond lasers in advanced manufacturing systems for enabling new forms of non-contact processing of transparent materials.Research advances have shown that a myriad of additive and subtractive techniques is now possible for flexible 2D and 3D structuring of such materials with micro-and nano-scale precision.In this paper,these techniques have been refined and scaled up to demonstrate the potential for 3D writing of high-density optical packaging components,specifically addressing the major bottleneck for efficiently connecting optical fibres to silicon photonic(SiP)processors for use in telecom and data centres.An 84-channel fused silica interposer was introduced for high-density edge coupling of multicore fibres(MCFs)to a SiP chip.Femtosecond laser irradiation followed by chemical etching was further harnessed to open alignment sockets,permitting rapid assembly with precise locking of MCF positions for efficient coupling to laser written optical waveguides in the interposer.A 3D waveguide fanout design provided an attractive balancing of low losses,modematching,high channel density,compact footprint,and low crosstalk.The 3D additive and subtractive processes thus demonstrated the potential for higher scale integration and rapid photonic assembly and packaging of micro-optic components for telecom interconnects,with possible broader applications in integrated biophotonic chips or micro-displays.

Future of processing and facilitating change and learning

The field of the sciences of the mind is evolving fast.With the diversification of knowledge and accumulation of data,often lacking integration and reproducibility,questions arise.The role of critical thinking and research is evident.As the science of the unconscious,psychoanalysis provides a method and theory to understand human minds and mentalities,helping the patient know his mind and transform action into reflection.Mental activities,including social skills,develop in the social context,depending on the social environment’s demands and resources put onto the individual.Encoding emotional signals,markers of meaning for the individual,is ontogenetically necessary and has influences on memory encoding.Beyond theoretical understanding,implicit relational knowledge is actualized in the therapeutic setting.With a strong focus on experiencing emotional reconsolidation of memories,previous relationships’repercussions are enriched with broadening viewpoints in the analytic environment.The long-term effects of psychotherapeutic treatments have been examined.A sufficient explanation of the specific factors contributing to success or an answer when an impact is lacking is still under investigation.When investigating subliminal and implicit mechanisms leading to memory reconsolidation and the formation of functional object relations and interaction patterns,the focus is set on affective interplay and processing prior/during and after social interactions.The present paper discusses which parameters might contribute to the reshaping of memories and the linkage of memory with the emotional load of experience.Providing insights into such dynamic mental phenomena could enhance process research by investigating moment by moment interactions in psychoanalysis,treatment,and learning processes.Due to the research subject’s complexity,different research methods and integration of associated research fields are required.

Laser technology in Poland： 2013-2016

This paper presents the state of art of laser technologies in Poland. A list of primary laser technology development centers is included. The involvement of Polish scientists in the development of lasers and fourth generation synchrotron light sources as well as their applications is discussed. The development of laser applications in medical therapy and diagnostics, material micro- and macro-processing as well as environmental monitoring and protection, safety, and security is presented.