Two Common Encapsulation Structures For ROSA

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ROSA (Receiving Optical Sub-Assembly): Optical receiving assembly, in the optical module to realize the conversion of optical signals to electrical signals, is an important function of the optical module parts.

· ROSA Structure

ROSA structure according to its different applications and cost requirements, usually with insert and without insert two different adapter structure, as shown in the figure below;

Figure 1 ROSA structure without ferrule

Figure 2 ROSA structure with ferrule

ROSA without insert (usually divided into stainless steel housing built-in ceramic sleeve adapter program and plastic adapter program, Figure 1 above is the plastic adapter ROSA structure) is more advantageous in terms of material and manufacturing cost, generally used in low-speed and short-distance optical modules;

Structure with insert program, its internal TO-CAN ball lens will have a TO-CAN with 8 degrees above the beveled insert, used to reduce the reflection of the optical transmission process, improve the quality of optical signal transmission, in order to enhance the processing accuracy of the ROSA generally this type of adapter are used with stainless steel with the structure of ceramic materials, generally used in long-distance and high-speed products.

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Two Common Encapsulation Structures For ROSA