The housing serves as a protective enclosure for the delicate components inside the optical transceiver, such as the laser diode, photodiode, and electronic circuitry. One of the key functions of the optical transceiver case is to provide physical protection to the internal. An optical module housing is the protective outer shell that encloses the internal components of an optical transceiver module. These modules are essential for converting electrical signals into light signals and vice versa, forming the backbone of fiber optic communication systems in data centers. Module housing plays a crucial role in the performance and durability of optical modules. Think of it as the chassis or skeleton of the module. Among various optical module form factors, SFP (Small Form-Factor Pluggable).