Diode-Laser, Intracavity, Trace-Gas Spectrometer

An innovative approach to laser absorption spectroscopy with diode lasers is described. Our objective in this project is to design, build and test the first-of-its kind intracavity laser absorption spectrometer for trace gas detection based on room temperature diode lasers, which will surpass the performance of other laser absorption spectroscopic techniques. The instrument will be advantageous over currently used techniques as a result of increased sensitivity and decreased complexity. In Phase I we will set up the first model of the system and demonstrate the intracavity spectroscopy mode of operation with a diode traveling wave amplifier in an external cavity. The detection sensitivity of the technique will be verified. In Phase II we will engineer and construct a prototype system, which will be tested in collaboration with NASA Goddard Space Flight Center personnel.