Optical frequency shifter technique based on stimulated Brillouin scattering in birefringent optical fiber.
An optical technique for producing a heterodyne carrier frequency suitable for electronic signalprocessing schemes in sensing applications is described. The technique exploits stimulated Brillouin scattering (SBS) generated in birefringent optical fiber. Systems based on single-fiber and dual-fiber topologies are reported that yield 10.6 ± 8.0- and 665 ± 10.0-MHz carrier frequencies, respectively. Frequency instabilities arose from nonlinear dynamical effects inherent to the SBS process. The implications of the results for future signal-processing and sensing schemes based on SBS are then discussed.
Duffy
C J
CJ
Tatam
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RP