摘要:
To provide an optical switcher capable of sending incident light on one input port to any plurality of output ports. The optical switcher includes input ports disposed on extensions of m input optical paths (m being 2 or greater natural number), output ports disposed on extensions of n output optical paths (n being 2 or greater natural number), and movable translucent switch mirrors 311-3mn, disposed at intersections of the m input optical paths and the n output optical paths, for switching between the input optical paths and the output optical paths. A switch mirror 311-3mn located nearer the input ports has a higher transmittance.
摘要:
This invention provides the easy and consistent displacement control of a piezo-electric actuator for driving the variable wavelength filter used for wavelength multiplexed optical communication, wherein the piezo-electric actuator is controlled once to the initial displacement condition and, thereafter, a driving voltage is applied to the piezo-electric actuator based on the displacement characteristic data stored in a memory circuit for obtaining a desired displacement.