Extremly Sensitive Atomic Detection Using Tunable Laser Spectroscopy

Tunable Far Infrared Laser Spectroscopy

using C02 laser difference generation in metal-insulator-metal diodes either from the difference between a fixed frequency C02 laser and a tunable waveguide laser, or from the difference between two fixed frequency C02 lasers plus microwave sidebands. is being used to make highly accurate FIR frequency measurements of stable species to serve as frequency and wavelength calibration standards; to...

Stable isotope analysis using tunable diode laser spectroscopy.

Measurements of ratios of stable isotopes are used in such diverse fields as petroleum prospecting, medical diagnostics, and planetary exploration. The narrow emission linewidth available from tunable diode lasers permits high-resolution infrared absorption measurements of closely spaced isotopic rovibrational lines. Our dual beam spectrometer uses the sweep integration technique in a spectral ...

Tunable laser resonance raman spectroscopy of bacteriorhodopsin.

Bacteriorhodopsin is a rhodopsin-like protein found in the cell membrane of Halobacterium halobium. It shows an absorption maximum at 570 nm and, in the light, undergoes cyclic spectral changes which include a relatively long-lived complex absorbing maximally at 412 nm. Excitation profiles have been obtained with several laser frequencies for two vibrations in the resonance Raman spectrum of ba...

Tunable Diode Laser Absorption Spectroscopy of Oxygen

Sensitive Detection of Epithelial Ovarian Cancer Biomarkers Using Tag-Laser Induced Breakdown Spectroscopy

Epithelial ovarian cancer (EOC) is the 5th leading cause of death from cancer in women and the main cause of death from gynecological cancer (Barber, 1986). Women have a lifetime risk of ovarian cancer of around 1.5%, which makes it the second most common gynecologic malignancy after breast cancer. Ovarian cancer is often referred to as 'the silent killer' because it frequently causes non-speci...