High Gain, Low Noise and Broadband Raman and Brillouin Fiber Optic Amplifiers, Channel Selectors and Switches.
Interim technical rept. 15 Jul 93-14 Jul 94,
NORTH CAROLINA AGRICULTURAL AND TECHNICAL STATE UNIV GREENSBORO
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Stimulated Brillouin and Raman scattering has been studied at 10.6 micron wavelength in fibers without much success due to the lack of low loss, single mode fibers and lasers with sufficiently narrow linewidth. The Brillouin based technology has advanced significantly with the advent of low loss, single mode fibers at 1.55 and l.3lO micron wavelengths. Conclusive experimental evidence points to the narrowband nature of Brillouin amplifiers, and redirects interest in their application to sensor and switching applications. Both stimulated Brillouin backscattering and guided acoustic wave forward scattering have been observed in fibers and are being explored for practical application as sensors to be bonded to or embedded in structures to monitor structural integrity. The stimulated Brillouin fiber ring laser is also being studied for its optical switching capabilities. The capability of this unique sensing mechanism is demonstrated in this report.
- Fiber Optics and Integrated Optics