The invention relates to a tunable
optical attenuator based on an PLZT electronically controlled
light scattering effect. The attenuator comprises a first
optical fiber collimator, a PLZT transparentceramic with a parallel
electrode, a first convex lens, an aperture, a second convex lens and a second
optical fiber collimator. When the first
optical fiber collimator is used in the
optical path ofan optical
fiber, the first optical
fiber collimator and the second optical
fiber collimator are light input / output paths, and the first optical fiber collimator, the PLZT transparent
ceramic with theparallel
electrode, the first convex lens, the aperture, the second convex lens and the second optical fiber collimator are coaxially arranged. The tunable
optical attenuator has a compact structure,the designing of the
optical path is simple and easy to achieve, the lost is low, the producing and adjusting are simple, not only can accurate control of
optical power attenuation be conducted, butalso
optical beam conversion can be achieved, control manners are flexible, and the
adaptation of different application demands is facilitated.