Nonlinear optical effects have had a major impact on many fields in optics since their discovery. We developed a numerical simulation to investigate how Time-Dependent Schrodinger Equations (TDSE) of electrons travelling within atomic and molecular potential wells, propagated with Finite Difference Methods, and excited with different types of laser sources, can show nonlinear photonic output.
In particular, here we are interested in resonance conditions of these systems. The parameters of a laser source, as well as the source type, have a substantial impact on the system’s TDSE. With the right conditions, and knowledge of the system’s current energy state, we can effectively choose what energy state to move the system to. We can likewise reduce the energy state by choosing conditions matching transitions to lower states, reducing the energy state of the system and stimulating photonic output.
In this paper we will show the effects of laser source conditions both in and out of resonance, in several different atomic systems with potential wells, and resulting nonlinear photonic output for each combination of parameters.
Traditional laser scanning microscopes require complex control systems to synchronize and control image acquisition. The control system is especially cumbersome in the multimodal laser scanning microscope. We have developed a novel multimodal laser scanning microscope control system based on a National Instruments multifunction data acquisition device (DAQ), which serves as both a data acquisition device and a programmable signal generator. The novel control system is low-cost and easy-to-build, with all components off-the-shelf. We have applied the control system in a multimodal laser scanning microscope. The control system has not only significantly decreased the complexity of the microscope, but also increased the system flexibility. We have demonstrated that the system can be easily customized for various applications.
In recent years, interest in studying the components of the cornea and their arrangement, with emphasis
on the corneal stroma, has expanded rapidly. By determining the corneal stroma’s organization in detail, we will understand better the relationship between its structure and functionality. Here, the
cornea’s collagen lamellae were scanned using second harmonic generation (SHG) microscopy, in order to determine the orientation of fibers in different directions within a two-dimensional cross section. A unique algorithm was used to quantitatively measure the directions. Cross sections were
obtained at several different depths in each sample. This work offers supplemental sectioning
revelations to the methods historically used to scan at the lamella level, such as X-ray diffraction.
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