Abstract

When a laser beam passes through the SWAOM, two laser beams emerge: a diffracted first-order beam ψ₁ and an undiffracted zeroth-order beam ψ₂. The two beams are launched into the opposite ends of a rotating fiber loop. The diffracted beam ψ₁ passes through the rotating fiber loop and then back into the SWAOM. When the beam ψ₁ enters the SWAOM after traversing the fiber loop two beams emerge: a diffracted first-order beam ψ₃, and an undiffracted zeroth-order beam ψ₄. Similary the undiffracted beam ψ₂ passes through the rotating fiber loop and reenters the SWAOM. The beam also becomes two beams, a diffracted beam ψ₅ and an undiffracted beam ψ₆. The two superimposed beams ψ₃ and ψ₅ can be detected by a photodetector.

© 1987 Optical Society of America