Measurement of multispecies concentration and gas temperature in an ammonium-dinitramide-based thruster by tunable diode lasers

Tunable Diode Lasers

At the recent Photonics West and Optical Fiber Conferences, companies presented many new products, ranging from mechanical products to instruments to complex laser systems. As a product engineer, there is nothing quite like the feeling of standing in the booth, talking to potential customers about the product You’ve designed or built. But the real success happens when customers buy the product ...

Widely tunable diode lasers advance microresonator research

Due to a very distinct spectrum of resonant frequencies, the characterization of optical microcavities calls for widely tunable sources of continuous wave laser light, offering suitably narrow linewidths and single-mode operation over the entire tuning range. This is why external cavity diode lasers, which allow for mode-hop free wavelength tuning, often over more than a hundred nanometers, hav...

Lithium isotope separation with tunable diode lasers.

A laser-isotope-separation study of lithium has been performed with two-step excitation involving UV laser radiation and a visible tunable-diode laser. The method yields a high degree of selectivity by tuning the narrow-linewidth diode laser to the D1 or D2 levels of the lithium atom. Selective laser excitation is simplified by the use of the tunable diode laser and the overall approach benefit...

A Bayesian Approach for Gas Concentration Reconstruction Based on Tunable Diode Laser Absorption Spectroscopy

We address the problem of 2D reconstruction of the gas concentration map from its 1D path averages based on Tunable Diode Laser Absorption Spectroscopy (TDLAS). This problem is challenging because typically only a very small number of paths are available. In addition, a path may not be set up to our desirable configuration. These challenges result in a large percentage of unobserved pixels in t...

Gas sensing in industry by tunable diode laser spectroscopy (TDLS)