Fast switchable electro-optic radial polarization retarder.

Tunable electro-optic polarization modulator for quantum key distribution applications

A tunable polarization retarder based on a bulk buried heterostructure semiconductor waveguide has been demonstrated for the specific application of quantum key distribution. Simplicity of construction, low drive voltage, wide spectral range of operation and potentially high frequency response make it ideal for polarization modulation at the transmitter (Alice) and receiver (Bob) in at least tw...

Duty cycle dependence of a periodically poled LiNbO3-based electro-optic Solc filter.

We demonstrate that the performance of a periodically poled LiNbO3- (PPLN-) based electro-optic Solc filter is dependent on the duty cycle of the crystal. This may limit the performance of the device for applications such as add-drop filtering and switching, owing to the deterioration of the extinction ratio. It is shown that by adding a retarder to the Solc filter it is possible to improve the...

Anisotropic liquid crystal gels for switchable polarizers and displays

An anisotropic liquid crystal gel with low operating voltage, high contrast ratio, broad bandwidth, wide viewing angle, and fast response time was demonstrated. In the voltage-off state, the gel is highly transparent. When the gel is activated by an electric field, light scattering occurs for the polarization along the molecular axis. By incorporating a l/4 film between the gel and a reflector,...

Integrated-Optic Polarization Controlling Devices Using Electro-Optic Polymers

Analytical model of scanning laser polarimetry for retinal nerve fiber layer assessment.

PURPOSE To develop a quantitative understanding of scanning laser polarimetry (SLP) for retinal nerve fiber layer (RNFL) assessment in glaucoma diagnosis and management. METHODS The Mueller calculus was used to model the polarization optics of SLP. A birefringent retinal structure (RNFL or macula) was represented as a circularly symmetric linear retarder with a radial slow axis. The birefring...