We propose using blazed gratings in the resonance domain with period larger than the wavelength for anti-reflection and polarization selection. The inherent problem in this region is wavelength dispersion, which is solved by analyzing the total reflectivity and electric field distribution. The positional relationship between the area of strong electric field, and the side and tip of the grating...

Distributed lightpath establishment in WDM optical networks involves, apart from routing, two important steps, namely wavelength selection and wavelength reservation. In uni-wavelength reservation protocols, often multiple connection requests unknowingly compete for the same wavelength, even when other free wavelengths are available, resulting in a collision. Attempting multiple wavelengths for...

In this paper we present an algorithm, called the Wavelength before Time with Preventive Conversion (WTPC) algorithm, that aims at reducing the loss rate in an optical burst switched network. The algorithm resolves contention in both the time and wavelength domain and uses a preventive conversion mechanism for some optical bursts that cause large voids. Without this mechanism our algorithm coin...

Wavelength-locking by a volume holographic grating (VHG) is reported for a diode laser bar with 49 single mode emitters, fitted with a dual-axis collimation phase-plate for smile elimination and excellent beam pointing correction. The much-improved VHG feedback with the ultra-collimated array beam gives 100% wavelength locking at 975 nm over a 17°C temperature range and external cavity lengths ...

Previous works have shown that wavelength conversion can considerably improve the performance in all–optical networks. However, it is an unrealistic assumption under the current technology and wavelength conversion with a limited range, not a full range, is more promising. In this paper, we propose a new analytic approach for such networks by virtue of the layered–graph where each wavelength is...

A variable selection procedure has been developed and used to reduce the number of wavelength data points necessary to formulate a predictive multivariate model for Pt, Pd and Rh using full atomic emission spectra (5684 wavelength data points per spectrum) obtained using a Segmented-Array Charge-Coupled Device Detector (SCCD) for inductively coupled plasma atomic emission spectrometry (ICP-AES)...