Compact, Rugged, Flexible Fiber Optic Interferometer for Sensitive Gas and P

Period of Performance: 09/30/1998 - 09/30/2000


Phase 2 SBIR

Recipient Firm

Alameda Applied Sciences Corp.
3077 Teagarden Street Array
San Leandro, CA 94577
Principal Investigator

Research Topics


Alameda Applied Sciences Corporation proposes to continue into Phase II, a Phase-I effort to build and test a Fiber Optic Interferometer (FOI). This FOI uses optical fibers and diode lasers to replicate the capabilities of a conventional Mach-Zender interferometer but in a compact, rugged and flexible package. In Phase I, we demonstrated tat a single-color, single-channel FOI provides the same density sensitivity as the two color interferometer at the Naval Research Laboratory, but in a smaller package that allows portability and greater flexibility, In Phase II we will construct a 2-color, multiple-beam FOI to measure both neutral and ionized gas densities in partially ionized plasmas. The multiple beam lines enable efficient mapping of gas and electron density profiles over three spatial dimensions and on ten nanosecond time scales. The primary aim is to deliver to DSWA an instrument that will assist the design of breakthrough gas loads for better soft x-ray sources from slow (~300ns), large radius (~5cm) implosions. It is expected that several other application areas will also emerge in Phase II. Commercialization will be the province of the Phase III effort. Commercial applications include measurement of densities and species concentrations in combustion chambers and exhausts of jet and rocket engines, automobiles and power production facilities; monitoring of pollutants and contaminants in air, water, and soil; study of environments around satellites, the space shuttle and space stations.