Abstract We proposed a compact 1 × multimode interference (MMI) optical modulator with high extinction ratio. A triply coupled quantum well structure is designed for the core layer enhancement of quantum-confined Stark effect, and MMI waveguide isolation trenches symmetrically designed. The length reduced by 30%, wavelength dependence was compared that observed in previously reported modulator....

The possibility of retrieving size distribution of aerosol particles in the stratosphere by measuring the extinction of solar radiation traversing the aerosol medium at two different wavelengths is explored in this work. This paper presents a parametric study of the effects of size distribution and composition of stratospheric aerosols on the value R, the ratio of extinction of solar radiation ...

In the present work, we investigate the impact of extinction ratio (ζ) of Mach-Zehnder (MZ) amplitude modulator on the performance of 2.5Gb/s Wavelength Division Multiplexed Passive Optical Networks (WDM-PONs) for optical fiber length varying upto 60km. The system performance has been analyzed by varying the value of ζ from 2 to 22dB. It is found that the system gives optimum performance at ext...