Progress in Standardization for lasers and Relevant Technologies. Standardization for Lasers Characteristics.

Towards safe and effective phytomedicines:the need for standardization

Over the past 20 years herbal medicinal products have become a topic of increasing global importance, with both medical and economic implications. In developing countries in Africa and Asia, botanicals have always played a central role in healthcare. Data from WHO suggest that 65 to 80% of the populations in these countries depend on traditional and botanical medicines as the primary source of ...

Power Supply and Current Modulation Circuits for Semiconductor Lasers

Design and construction of a stable current supply with protection circuits are described. The reported circuit provides a high-stable and high-level current variable from 0.5-1.2 A with the protect ion circuits to prevent over load current, voltage and off-range temperature operation. A detailed analysis of the circuit parameters is given and the time behaviors of the load voltage/current and ...

Guidelines on Lasers and Technologies

Design Optimization for 4.1-THZ Quantum Cascade Lasers

We present an optimized design for GaAs/AlGaAs quantum cascade lasers operating at ‎‎4.1THz. This was based on a three-well active module with diagonal radiative transition. This ‎was performed by modifying the existing model structure, to reduce the parasitic anticrossings ‎‎(leakage currents) as well as the optical gain linewidth. While the gain FWHM was reduced by ‎more than 50% the gain pea...

Towards safe and effective phytomedicines:the need for standardization

Over the past 20 years herbal medicinal products have become a topic of increasing global importance, with both medical and economic implications. In developing countries in Africa and Asia, botanicals have always played a central role in healthcare. Data from WHO suggest that 65 to 80% of the populations in these countries depend on traditional and botanical medicines as the primary source of ...