A fixing device for thermally fixing a developer image to a sheet fed in a sheet feeding direction includes: a tubular flexible fusing member; a heater; a nip member; a resiliently deformable backup member; and an adjustment mechanism. A number of systems and methods are disclosed to adjust the coupling of the waveguide device to the optical fiber. , but is substantially dissolved in the polar organic liquid at temperatures of from 40 to 100 C. Each transistor of the first plurality has a source coupled to a source voltage bus, and each transistor of the second plurality has a source not coupled to the source voltage bus, through use of a programmable contact window during fabrication. The first section opening edge and the second section opening edge define an upper surface opening in an upper surface of the housing.