In this paper, based on the traditional dislocation-type optical fiber variable optical attenuator with large dynamic range, the fluid pressure/pressure regulation is transformed into optical fiber micro-displacement control, which is easy to realize the. In this paper, based on the traditional dislocation-type optical fiber variable optical attenuator with large dynamic range, the fluid pressure/pressure regulation is transformed into optical fiber micro-displacement control, which is easy to realize the. A variable optical attenuator is a key component for wavelength division multiplexing (WDM) transmission node power equalization, optical amplifier gain flattening, multiplexing point channel balancing, and receiving node power management in fiber optic communication. A fiber optic type variable. According to the working principle of optical attenuators, optical attenuators can be divided into displacement optical attenuators, direct coating optical attenuators, attenuating sheet optical attenuators, and liquid crystal optical attenuators. Optical attenuator is a very important Optical attenuator is a device used to. The silicon based VOA array device is an all solid state chip, with a response speed of 100 nanoseconds, eight channel monolithic integration, and low power consumption. Along with power consumption of as low as 30. The main applications are: preset optical power balancing.