Laser Interaction with Materials for Applications in Optics and photonics: LIMAO

点击翻译按钮获取中文摘要

This proposal aims to investigate the interaction of lasers and dielectrics, especially glass, one of the most interesting materials known to man. While it has several different areas of investigation, the link nevertheless remains as laser-material interaction. Hence, the proposal seeks several answers, on the noise characteristics of stimulated Brillouin scattering in optical fibre beyond the first order, the enhancement in Rayleigh scatter in optical fibre with exposure to UV radiation which we were the first to report, the implementation of “perfect” meter long fibre Bragg grating with ultra-narrow bandwidths and the possibility of “tailoring” the optical characteristics of sources by manipulating phase and amplitude, and narrow linewidth lasers, exhibiting an outstanding performance for a low cost laser. Combining this with broadband harmonic generation with in-house built periodically poled nonlinear crystals will allow ultra-narrow wavelength transposition to new regions with ease at a far lower cost than has been possible so far. Random lasers is an area of intense curiosity not only from a scientific point of view but also from serious applications such as in chaotic communication and association with scattering effects in bio tissue. One of the next frontier in photonics integration into cell-phone glass is a challenge which needs to be fully exploited. The related area of “Photonics on a tape” is an area that has only just begun, and one which should yield interesting application in the clinical and laboratory environment. Exploiting the nonlinearity of chalcogenide waveguides on a tape, written with fs lasers offers exciting possibilities for combining interconnects with functionality. How this technology may be harnessed for added functionality is yet to be discovered. We also seek to find the limits of cold atom guidance in hollow-core optical fibres as well as push the boundaries of laser cooling by introducing more managable materials to the currently limited high efficiency coolers. Many aspects of multiplexing of SPR sensors have to be investigated: for example, how the guided mode coupling to the SPR may be effected remotely. Optical fiber being the conduit for light, has remained a passive device; we aim to coat it with specialist coatings such as carbon nanotubes and oriented polymers to add novel functionality for optical sensing and specially coated fibre without a buffer layer, so far unavailable in the commercial world.