After making sure that the optical module is inserted properly, check whether the fault persists. If no, the fault rectification finishes. Subsequently, the driver semiconductor laser. The optical module serves as a crucial component in optical fiber communication systems, operating at the physical layer, which is the lowest layer in the OSI model. Its primary function is to achieve optoelectronic conversion by converting electrical signals into optical signals and vice versa. Optical modules typically have an electrical interface on the side that connects to the inside of the system and an optical interface on the side that connects to the outside. the present technologyrelates to an optical module, an adjustment device, and an adjustment method, and more particularly relates to an optical module and the like capable of reducing accuracy of positional deviation.