Optimization of multi-grating volume holographic spectrum splitters for photovoltaic applications

Spectrum resolved fluorescence imaging in multi-focal volume holographic microscopy

A real-time three dimensional (3D) fluorescence imaging system incorporating wavelength-coded and multiplexed holographic gratings is presented. Holographic gratings formed in thick Phenanthrenquinone(PQ-) Doped Poly (methyl methacrylate) (PMMA) have narrowband spectral-spatial transmittance filtering properties to generate wavelengthspectrum selective multi-focal planes within a biological obj...

Performances of volume phase holographic grating for space applications: study of the radiation effect.

The special properties of volume phase holographic gratings make them promising candidates for spectrometry applications where high spectral resolution, low levels of straylight, and low polarization sensitivity are required. Therefore it is of interest to assess the maturity and suitability of volume phase holographic gratings as enabling technologies for future space missions, with demanding ...

Optimization of Bistability in Nonlinear Chalcogenide Fiber Bragg Grating for All Optical Switch and Memory Applications

We solve the coupled mode equations governing the chalcogenide nonlinear fiber Bragg gratings (FBGs) numerically, and obtain the bistability characteristics. The characteristics of the chalcogenide nonlinear FBGs such as: switching threshold intensity, bistability interval and on-off switching ratio are studied. The effects of FBG length and its third order nonlinear refractive index on FBG cha...

Analysis and Optimization for Volume Holographic Recording

Optimization of finite-length input volume holographic grating couplers illuminated by finite-width incident beams.

A finite volume holographic grating coupler (VHGC) normally illuminated with various incident-beam profiles (such as a Gaussian beam, a flat cosine-squared beam, and an exponential-decay beam) with finite beam widths for input coupling is rigorously analyzed by use of the finite-difference frequency-domain method. The effects of the incident-beam width, the incident-beam position, the incident-...