Automated optical main distributing frame system

Automated optical main distributing frame (MDF) system comprising;

• a plurality of optical directional couplers having three ports, a first port of each directional coupler being coupled with an external optical line, a second port being coupled with a second matrix waveguide, a third port being coupled with a first matrix waveguide,
• a jumper section having a link with at least one of said first matrix waveguide deposited on a substrate with a plurality of waveguides intersecting one another at crosspoints,
• said first waveguide being coupled with external optical lines through said directional couplers and office optical lines so that one of external lines is connected to selected office line through a crosspoint of the first matrix waveguide,
• each crosspoint of said first matrix waveguide having a groove which is slanted to waveguides by a predetermined angle and is subject to be filled with matching oil which has essentially the same refractive index with that of a waveguide so that a light signal in a waveguide goes straight through the cross point when a groove is filled with matching oil, and the light signal changes its direction to another waveguide at the crosspoint through total internal reflection by the groove when the groove is empty,
• a second matix waveguide of 1.times.n crosspoints of similar structure to that of the first matrix waveguide,
• said second matrix waveguide being coupled with third ports of said directional couplers, and a signal test device which is subject to be coupled with selected external optical line through said second matrix waveguide, and said directional couplers, first matrix waveguide and second matrix waveguide being deposited on a common substrate.