Demonstration of novel optical multichannel grating demultiplexer receiver (MGD) for HDWDM systems

A novel implementation of a multichannel grating demultiplexer receiver suitable for HDWDM applications is described. The prototype receiver, capable of 10-channel operation spaced at 4 nm, uses a 16-element GaInAs/InP monolithic linear photodetector array and silicon preamplifier ICs. The sensitivity at the input to the demultiplexer is -31 dBm at 200 Mbit/s. Optical and electrical crosstalk measurements in the receiver are presented, and limited tests have shown that there is a negligible crosstalk penalty.<>     

Comparative performance evaluation of single-slope and pyramid-shaped solar stills: experimental evaluation

In the present research paper, experimental analysis is based on the fresh water output rate due to different structural arrangements of two different stills. In the performance evolution, the operational parameters such as water temperature, ambient temperature, inner glass temperature, and productivity have been predicted. A comparative performance between two different solar stills was carried out to evaluate the distillation and effective parameters under the same climatic conditions for several days with different depths of water (2.5 and 3.5?cm) and also to provide a large evaporation surface and utilise the latent heat of condensation using jute cloth. The experimental results show that efficiencies of these solar stills confirm that the fresh distilled water output of the pyramid-shaped solar still is higher than that of the single-slope solar still under different effective parameters.