N. Nishizawa et al., SYMMETRICAL AND ASYMMETRIC FIBER LOOP MIRRORS FOR OBSERVING GUIDED-ACOUSTIC-WAVE BRILLOUIN-SCATTERING IN POLARIZATION-MAINTAINING FIBERS, Optics letters, 19(18), 1994, pp. 1424-1426
A new scheme of symmetric and asymmetric fiber loop mirrors is propose
d to identify clearly the polarized guided-acoustic-wave Brillouin sca
ttering spectra with multimode laser sources. The guided-acoustic-wave
Brillouin scattering spectra in PANDA fibers in the low-frequency reg
ion are unambiguously confirmed with this scheme.