Nitrous oxide emissions

The purpose of this paper is to report the effect of key operating parameters, the relative importance of coal type, and the potentially significant coal properties for producing N[sub 2]O emissions in an atmospheric circulating fluidized-bed combustor (CFBC) and pressurized bubbling fluidized-bed combustor (PFBC). The generation of N[sub 2]O emissions is quantified in an empirical model based on the experimental data

Phase locking and periodic evolution of solitons in passively mode-locked fiber lasers with a semiconductor saturable absorber

Passively mode-locked lasers with intracavity weakly birefringent fiber are theoretically analyzed based on two coupled complex one-dimensional Ginzburg-Landau equations. The model includes fiber birefringence, spectral filtering, saturable gain, and saturable loss. Phase-locked soliton solutions are found for small amounts of birefringence and several types of soliton with periodic polarization evolution for higher amounts of birefringence. Numerical simulations show qualitative agreement with experimental results. © 1998 Optical Society of America.The research of J. M. Soto-Crespo was supported by Comunidad de Madrid contract 06T/039/96 and by Direcci´on Generale de Ense ˜ nanza Superior contract PB96-0819.Peer Reviewe

Observation of polarization-locked vector solitons in an optical fiber

Polarization-locked vector solitons (PLVS) were observed in an optical fiber lasers with well-controlled birefringence. Couple-nonlinear Schrodinger equations were used to describe the evolution of the polarization components along the axes of the fibers. The fiber laser allowed the monitoring of vector solitons in a transmission system.Peer Reviewe