In-situ Measurement for Gas Concentrations using Tunable Lasers

Managing in situ gold concentrations in placers

In studying of the in situ gravitational concentration process part feature for placer, the technological ability to transform the in situ massif placer structure is evident. The two main processes involved in altering the massif in situ have been examined and outlined in detail. The in situ disintegration of massif material results in a new massif gravitational stratification structure. Regula...

Wavelength Swapping using Tunable Lasers for Fractional λ Switching

Lambda Switching (FλS) is a novel proposal for the management of all-optical networks with sub-wavelength provisioning capability. The unique characteristic of FλS is the utilization of the UTC (coordinated universal time) for alignment and switching. Several central research issues are still open in FλS and need to be formally defined and analyzed. Within the scope of this paper, we introduce ...

Using Narrow-Linewidth Lasers for Rapidly Tunable Microwave Signal Generators

Narrow-linewidth lasers are a key component of photonic microwave signal generators, as the width of the generated RF signal is equal to the beat note of used lasers. Heterogeneous silicon photonics platform opens up a possibility of improving the coherence of fully integrated photonic microwave generators by providing means to separate the photon resonator and absorbing active medium; improvin...

Detection and Measurement of Middle Distillate Fuel Vapors Using Tunable Diode Lasers

A sensor for rapid (10 msec response time) measurement of vapors from the hydrocarbon-based fuels JP-8, DF-2, and gasoline is described. The sensor is based upon a previously reported laser mixing technique that uses two tunable diode lasers emitting in the near-infrared spectral region [1] to measure concentrations of gases having unstructured absorption spectra. The fiber-mixed Published in A...

3 Tunable Dye Lasers