Virtual simulation experiment in the course Laser Principles and Techniques for undergraduates

Abstract

The course Laser Principle and Technology for undergraduates is a multi-physics subject with main contents of laser's basic principle, laser modulation techniques, Q-switching techniques, etc. . In order to help students understand the complex theory and to integrate the theory with the engineering practice, we developed a virtual simulation platform/software. This platform consists of three main modules (laser generation, laser propagation and laser controlling), which can be subdivided into eight secondary modules, including laser output characteristics, laser resonator, laser modulation, frequency conversion, et al. . Each module has its input and output parameters and can be modified by the user. The theoretical models and the algorithms are introduced in this article. The output characteristics of the relaxation oscillation process are presented as an example of the simulation results.

Cyanobacterial Blooms Enhance Nitrogen Removal in Lakes through Carbon/Nitrogen Coupling Metabolism

“…The carbohydrate and protein concentrations were measured using the modified phenol method and the Coomassie brilliant blue G250 method, respectively. The collected cells were used to measure lipid-soluble pigments (chlorophyll a , Chl a , and carotenoids) according to the methods of the APHA (1999) and water-soluble phycobilins (phycocyanin, PC, allophycocyanin, APC, and phycoerythrin, PE) according to the methods reported by Li and Padgett and Krogmann . Details of the analytical processes are presented in the Supporting Information Text.…”