In the quest for cost-effective bi-directional transceivers for the fibre-to-the-premise (FTTP) applications, this article describes the development of such devices manufactured on the Planar Lightwave Circuit (PLC) platform. The transceiver consists of the optical head, which receives, filters and detects the optical signals and the electronics, which processes these signals according to specific protocols. In this article, the realization of the optical head (known as a diplexer or triplexer) will be the main focus, with key results, such as the manufacture of the hybridization platform, the design and performance of the optical filters and the hybridization on the laser and photodiodes, presented. The challenges faced in the development will be described as well as the next steps to achieving the final product.
Partially and fully developed speckle fields form cylindrical surfaces are described analytically with special emphasis on the measurement of surface translations. Based on the ABCD-matrix method, two generic optical system for determining angular velocities and angular displacements will be analyzed. It will be shown that robust, non-contact optical system for industrial applications can be produced. The basic system that is analyzed is as follows: a laser beam of arbitrary radius of curvature illuminates a pane or curved surface. The speckles in a plane following an optical system are analyzed with respect to various target deformations. Specifically, the speckle translation, the speckle size and the speckle decorrelation in the detector pane will be analyzed.
Bacteriorhodopsin (bR) originating from the purple membrane of the bacterium Halobacterium Halobium has been extensively studied during the last few years for a number of optical applications. Extending the lifetime of the intermediate M-state in bR chemically, has been found to improve the sensitometric properties of bR. In this paper, a new method of extending the lifetime of the M-state in the bacteriorhodopsin photocycle is presented. The method pertains to the use of 18- crown-6 ether as an agent to extend the M-state lifetime.