In the above mentioned embodiment of the optical waveguide structure according the third aspect of the present invention, preferably, the second contact point and the third contact point are located on a second perpendicular line, which is parallel to the reference perpendicular line and placed on {HEAD ~ the coupling side} relative to {TAIL ~ the reference perpendicular line}; and further comprising an intermediate core between the reference perpendicular line and the second perpendicular line 
relative to
In the above mentioned embodiment of the optical waveguide structure according the third aspect of the present invention , preferably , the second contact point and the third contact point are located on a second perpendicular line , which is parallel to the reference perpendicular line and placed on { HEAD ~ the coupling side } relative to { TAIL ~ the reference perpendicular line } ; and further comprising an intermediate core between the reference perpendicular line and the second perpendicular line
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