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 {TAIL ~ the reference perpendicular line} and placed on the coupling side relative to the reference perpendicular line; and further comprising {HEAD ~ an intermediate core} between the reference perpendicular line and the second perpendicular line 
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 { TAIL ~ the reference perpendicular line } and placed on the coupling side relative to the reference perpendicular line ; and further comprising { HEAD ~ an intermediate core } between the reference perpendicular line and the second perpendicular line
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