Abstract: A device has a plurality of waveguide structures including two active (one of which comprises two sub-layers), two passive, and three intermediate waveguide structures on a common substrate. At least partial butt coupling between active and intermediate waveguide structures, and tapering in the intermediate and/or passive waveguide structures at each junction therebetween facilitates efficient optical mode transformations as optical signals travel through the device, either from a first sub-layer of the first active waveguide structure through the other sub-layer, then sequentially though a first intermediate waveguide structure, a passive waveguide structure, a second intermediate waveguide structure, a second active waveguide structure, a third intermediate structure, and a second passive waveguide structure; or in reverse from the second passive waveguide structure back through to the first sub-layer of the first active waveguide structure.

Abstract: An agricultural header for use with an agricultural harvester includes a frame, a row unit having a row unit frame, a first body and a second body. The first body is coupled to the row unit frame and includes a first post, a second post, and a third post defining a plurality of adjustment openings. The second body is pivotally coupled to the second post and selectively coupled to the third post via one of the plurality of adjustment openings. A first contact member and a second contact member are movably coupled to the second body. A sensing unit is disposed in contact with the first and second contact members. A stalk feeler is deflectably coupled to the sensing unit and is configured to being disposed within a plane. A movement of either contact member induces movement of the stalk feeler relative to the plane.

Abstract: A device has a plurality of waveguide structures including two active (one of which comprises two sub-layers), two passive, and three intermediate waveguide structures on a common substrate. At least partial butt coupling between active and intermediate waveguide structures, and tapering in the intermediate and/or passive waveguide structures at each junction therebetween facilitates efficient optical mode transformations as optical signals travel through the device, either from a first sub-layer of the first active waveguide structure through the other sub-layer, then sequentially though a first intermediate waveguide structure, a passive waveguide structure, a second intermediate waveguide structure, a second active waveguide structure, a third intermediate structure, and a second passive waveguide structure; or in reverse from the second passive waveguide structure back through to the first sub-layer of the first active waveguide structure.