We demonstrate a Colorless, Directionless, and Contentionless add/drop that is made possible by newly proposed multistage tunable filters; it will be effective in the creation of flexible and dynamic optical path networks. The filters consist of small-scale switches and AWGs (Arrayed Waveguide Gratings) and so are cost effective. The technical feasibility of the drop configuration using propose...

Intersymbol interference in direct detection optical systems can limit the channel spacing in frequency division multiplexing systems, and limit data rates and transmission distances in long distance transmission systems. We present minimum mean-square-error electrical filters to compensate for optical intersymbol interference. The performance of these filters is compared with a matched filter ...

The reduction of the soliton interaction by use of optical sliding-frequency second-order Butterworth filters is studied numerically. It is found that the second-order Butterworth filters can reduce the soliton interaction more effectively than Fabry-Perot filters or third-order Butterworth filters because the secondorder Butterworth filter induces larger frequency chirping on the soliton, comp...

Recent behavioural studies on fish have emphasized the role of ultraviolet (UV) wavelengths in mate choice. We performed female mate choice experiments, focusing on the UV wavelength range, with the three-spined stickleback, Gasterosteus aculeatus, a species in which the role of visually guided behaviour in the human-visible wavelength range (400–700 nm) has been well studied. Ripe female stick...

The use of pupil-plane filters in microscopes has been proposed as a method of producing superresolution. Here it is shown that pupil-plane filters cannot increase the support of the transfer function for a large class of optical systems, implying that resolution cannot be improved solely by adding pupil-plane filters to an instrument. However, pupil filters can improve signal-to-noise performa...

The design concept of the required optical filters for the Fluorescence Detector of the AUGER Project, is presented in this work. Due to the needed high transmittance values in the UV region, the dielectric thin film multilayer technique, using UV-transparent materials, has been selected. The design method applied, is the “Monte Carlo Simulated Annealing” (MOCASA). Two alternative target spectr...

This paper reports the design of a miniature, costeffective spectroscopy system for assessing tissue biochemical and morphological information using a few wavelengths. This instrument will be based on thin-film optical filters and silicon photodiodes, avoiding the use of a full spectrograph and optical fibers. The feasibility of using only 16 wavelengths to accurately extract tissue information...

There is strong interest in the development of tunable lasers and optical filters for a number of optoelectronic applications. From a telecommunications standpoint, compact, efficient, and affordable tunable sources and filters could find immediate widespread use for wavelength division multiplexing (WDM) systems, enabling incredibly dense optoelectronic communications over a single optical fib...

Accurate scanning of a color image, which is absolutely essential for good colour reproduction, depends upon the creation of a set of filters matched to the optical system of the scanner. Previous work developed a measure of goodness for a set of color filters. The measure provides an optimization criterion which can be maximized to obtain optimal scanning filters of arbitrary spectral shapes. ...