| 摘要 |
<p>The invention pertains to an optical waveguide structure comprising at least one optical main waveguide and at least one power tap for tapping of signal power carried in the guided mode of the optical main waveguide, wherein for tapping the optical main waveguide gradually widens over a length Ltaper to a width Wtaper and then gradually narrows to a finite width, thereby forming a tapered waveguide, and the power tap branches from the tapered waveguide. The tapered form of the waveguide allows only a fraction of the guided mode to be coupled into the power tap; hence the loss resulting from the power tap is kept to a minimum. Further, tapping is virtually wavelength-independent and the manufacturing tolerance is good. <IMAGE></p> |
