Abstract
In late-19th century, Abbe and Rayleigh derived the resolution limit of optical microscope, which is about a half of wavelength used for illumination, implies we can only see details down to nanometre level using visible light and it is unnecessary to increase magnification power beyond this limit.
Super-resolution microscopy(SRM) are techniques which can achieve an effective resolution better than diffraction limit stated by Abbe and Rayleigh with specially-designed optics and image processing. Structured Illumination Microscopy(SIM) is one of SRM techniques and it has two core elements in experiment: creating a structured illumination by interfering light sources and acquiring data with different phases between sources, and an image with doubled resolution can be reconstructed from raw data.
Most of current implementations require the use of diffraction grating to create structured illumination and phase difference between diffraction orders can be achieved by lateral movement of the grating. We propose an alternative implementation using optical fibres assembly and fibre phase shifters. It provides more flexibility to interference pattern and mechanical control of phase can be replaced with an electrical one.
In this seminar I will present the theory and experimental results of creating interference pattern by optical fibre terminals.
Anyone interested is welcome to attend.