The stability of optical communications depends on the specification stability of optical components and on the properties of materials conjugated with the electromagnetic properties of light. Diffraction, the product of interference and the periodic variation of refractive index, is applicable in a plethora of optical devices that are deployed in dense wavelength division multiplexing (DWDM), such as optical filters, optical add-drop multiplexers (OADM), and others. However, temperature variation affects the optical and the mechanical properties of materials and thus the propagation characteristics of optical signals. Similarly, thermal expansion affects the properties of diffraction gratings, which is manifested as spatial angular shift. This shift has an adverse effect on the proper operation of grating devices and the function they perform. In this paper, we provide a temperature sensitivity analysis of diffraction gratings and a self-compensating method that provides performance stabilization due to temperature.