A subject of wide interest in life sciences is the noninvasive characterization of microscopic objects within a complex heterogeneous system. Fluorescence microscopy is a powerful technique for imaging of biological samples. ......Read More
Thesis describes the process and technique of optical fiber splicer based electric arc discharge method for fabrication of long period gratings in different kinds of optical fibers. Also describe the capabilities of the fabrication and the gratings morphological analysis.........Read More
In this work, we demonstrate the design and the implementation of a nonlinear microscope based on Stimulated Raman scattering, not commercially available, which is equipped with three femtosecond laser sources: Ti:Sa, OPO and OPO+SHG. In order to cover all the regions of Raman spectra: the fingerprint region (400 cm-1 – 1600 cm-1), the silent region and the CH region (greater than 2700 cm-1), they can be used in two different combinations. The first one, using Ti:Sa and OPO+SHG, can cover in SRL modality the fingerprint region and the silent region. The second one, using Ti:Sa and OPO, can cover the C-H region in SRG modality. Test of the set-up has been carried out by acquiring the images of polystyrene beads, in SRL and SRG modalities.
Co-sponsored by organizations including SPIE, the international society for optics and photonics, the 2016 Winter College on Optics focused on optical frequency combs technology.
This project leads to design and development of dual field of view optical system for 3 - 5 µm wavelength range. The Field of view (FOV) in narrow mode is 2° whereas FOV in wide mode is 10° giving a magnification of 5X. The detector pixel size is 15 µm x 15 µm. The relative aperture of detector is 3. For making simple and practical priority has been given to use of the conventional lens materials. In order to switch FOV two different optical configurations (multi-configuration) are superimposed and both the configurations are optimized to achieve the diffraction limit of the optical system
Setting up fabrication platform which is easy to set up, flexible and economical fabrication procedure also fabrication is virtually possible in all kind of optical fibers