This summer, I had the opportunity to work with the Princeton University Laser Sensing (PULSe) Lab, which is interested in laser-based spectroscopic systems. Their work has many real-world applications in trace gas detection and chemical sensing, including environmental monitoring, biomedical research, atmospheric chemistry, and industrial emissions and process control. My main project this summer was to create online tools for future spectroscopic research to be published on the PULSe website. I have completed two web applications. The first is a simple unit converter for units involved in frequency and wavelength calculations, and the second is an app that takes user-input, performs a database search, and returns a table and plot of molecular absorption data. With the time remaining in the program, we started working on a third app, which will display live measurements of carbon dioxide levels in the lab using an absorption spectroscopy-based sensor. In addition to developing web applications, I performed data fitting and analysis on measurements taken using absorption spectroscopy to determine the concentration of various samples in the lab.