Acousto-Optic fiber modulations
Original Publication Date: 1985-Oct-01
Included in the Prior Art Database: 2005-Feb-19
The confinement of light in a single-mode optifal fiber weakens the Bragg condition on Acousto-optic interactions. Sound wave lengths longer than twice the core diameter cause modulation of the phase of light, but no deflection. Certain transverse sound waves cause depolarization of polarized light. This effect can be used for intensity modulators. Acoustical resonances of fiber can enhance the interaction with the core at certain frequencies. Very high frequency sound waves can make the cores lossy.