We developed a framework for constraint routing in multi-domain optical network which combines PCE with service
plane. With the distributed routing computation characteristic of PCE and the adaptability of service plane for service
attributes, the framework provides an optimal SLA-based constraint routing strategy. Experiment results verify our
framework and strategy.
Based on the service plane (SP) of Adaptive Multi-Service Optical Network (AMSON), this article designs and implements optical service level agreement (O-SLA),which meets the clients' requirements and improves the performance of the optical network. Our Adaptive Multi-Service Optical Network (AMSON) testbed is based on the framework of Automatic Switched Optical Network (ASON), and introduces a service plane (SP) into it as an independent functional plane. SP receives and processes the service requests submitted by the clients. An O-SLA is a formal contract between an optical network service provider and a service subscriber that contains various service levels and diverse clients' requirements. We focuses on designing and implementing O-SLA on SP of AMSON by introducing O-SLA to Bandwidth on demand (BoD). BoD is a kind of service initialized by clients in SP and can be adjusted dynamically. We classify three levels for the contents of O-SLA that enable the clients to get three kinds of authorization. To conduct this O-SLA, the network operators should publish relevant information to SP. According to this information and O-SLA, the related modules of SP can lay out proper instructions to CP. Then appropriate operation will be done by CP and the results of it will be returned to SP. Some simulations have been done and results are given, which illustrate that the implementation of O-SLA combined with BoD on SP of AMSON induces the blocking rate and improves the utilization of the network resource.
A lower-cost monochrome CCD camera, which can detect the twenty-five frames of picture in one second, provides a rapid method to measure two-dimensional luminance distributions of the screen. According to the two-dimensional luminance distribution ratios of three primary colors captured by the CCD camera and the chromaticity coordinates of R, G, and B calibrated by the spectrometer, the chromaticity coordinates of combination colors of the LCD projector can be
computed quickly. The algorithm of removing the black stimulus values and the precise calibration in five gray levels of CCD are employed to diminish the error. The two-dimensional distribution maps of chromaticity coordinates of combination colors of five levels are represented in this paper. The data show that the maximum difference between the chromaticity coordinate measured by CCD-based system and by the spectrometer is 0.009, which can present the color uniformity of LCD projector properly.
We report an Optic fiber color sensor applied to measure the inside state of an airtight container, that will be able to indicate the life time of the container material. This measurement system consists of a cool light source, Y-branch optical fiber cable, photo-detectors and an information processing module which output the experimental result as the form of triple color primaries. Because the airtight container have only one hole, it only allows inserting the fiber, so applying the fiber optic sensor to detect is the better selection than other ways. The experiment results are discussed in detail. With simple structure, small volume, light weighty, the fiber optic color sensor can measure without effecting the inside vacuity of the airtight container. It is suitable to precisely remote control the measurement in the space of narrow and having complex atmosphere, and is in prospect of wide application.
It has been shown that it is possible to fabricate very small lenses by melting islands of inorganic photoresist on a glass substrate. The inorganic photoresist composited in our laboratory is suitable to be exposed by Electron Beam (EBE) or X-Ray. We have obtained the lithophotography pattern with 0.6 micrometers line width by EGE exposure. Because the resist pattern will not swell and distort during the processing, there is no problem of shelf life. We have made lenses with diameter from 0.8 mm to 1.0 mm, in the form of spheres, and have studied their optical properties.
In this paper, we will show that it is possible to generate very small lenses by melting islands of inorganic photoresist on a glass substrate. The inorganic photoresist composited by us is suitable to be exposed by Electron Beam (EBE) or X-Ray. We have obtained the lithophotography pattern with 0.6 micrometer line width by EBE exposure. Because the resist pattern will not swell and distort in the developing solution, so there is no problem of shelf-life. We have made lenses with diameter ranging from 0.8 mm to 1.0 mm in the form of spheres and also have studied their optical properties.