Title :
High-resolution microwave phonon spectroscopy of dispersion-shifted fiber
Author :
Oh, Ilwhan ; Yegnanarayanan, Siva ; Jalali, Bahram
Author_Institution :
Electron. Eng. Dept., Mokpo Nat. Univ., South Korea
fDate :
3/1/2002 12:00:00 AM
Abstract :
First measurements of acoustic modes in dispersion-shifted fiber are presented. High-resolution microwave phonon spectroscopy, performed using an improved method for resolving resonant spectral features, reveals the presence of the L/sub 04/ mode. The use of external cavity tunable lasers for pump and probe enables kilohertz range spectral resolution and high sensitivity. In addition, this method enables down conversion of the phonon spectrum to lower frequencies through the use of beat-Brillouin effect.
Keywords :
microwave spectroscopy; optical fibre dispersion; optical fibre testing; stimulated Brillouin scattering; Brillouin spectra; acoustic modes; dispersion-shifted fiber; down conversion; external cavity tunable lasers; fiber-doping profile; high sensitivity; high-resolution microwave phonon spectroscopy; stimulated Brillouin amplification; swept microwave sideband; third higher order acoustic mode; Acoustic measurements; Dispersion; Fiber lasers; Laser modes; Microwave theory and techniques; Phonons; Pump lasers; Resonance; Spectroscopy; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
