The purpose of this paper is to illustrate one of the possible areas of application of smart materials to microelectronics. The problem considered in the paper is related to the requirement to prevent optical fibers from a contraction at low temperatures. This task is achieved by combining an optical and a shape memory alloy fibers. If the latter is in the austenite phase at a reference temperature, it will experience a martensite transformation when the temperature is reduced below the martensite start value. The martensite transformation of a shape memory material is accompanied by its expansion. Therefore, it is possible to design an assembly where a contraction of the optical fiber will be compensated by an expansion of the shape memory fiber yielding a prescribed deformation.