Tunable optical attenuator based on PLZT electronically controlled light scattering effect

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of electro-optical materials and devices, in particular to an adjustable optical attenuator based on PLZT electrically controlled light scattering effect. Background technique [0002] A variable optical attenuator (VOA) is a device for controllably attenuating optical power. In optical communication, VOA can not only realize optical signal power adjustment and channel equalization, but also be directly used for overload protection of optical receivers, analog detection of dynamic range and distance of optical fiber transmission systems, evaluation and adjustment of optical communication line systems, etc. At the same time, VOA realizes real-time control of light by attenuating optical power, and has a wide range of applications in laser processing, measurement and calibration of optical instruments, etc., so VOA is a key passive optical device in laser and optical communication applications. [0003] At pr...

AI Technical Summary

Problems solved by technology

However, this type of electro-optical device based on the electronically controlled birefringence effect can only be used for polarized light sources in practical applications, that is, the device is polarization-dependent, and an additional optical path is required for adjustment of non-polarized light, which increases to a certain extent It increases the design difficulty and cost of the optical system, which greatly limits its application range

Images