Optical sub-assembly module and cap thereof

An optical sub-assembly module, comprising:

• a cap, two opposite ends of the cap being respectively defined as a light source end and a connecting end;
• wherein the cap includes:
• a receiving groove recessed inwardly from the light source end, wherein the receiving groove is divided into a first receiving groove and a second receiving groove, the first receiving groove is disposed close to the connecting end, the second receiving groove is disposed close to the light source end, and the first receiving groove is in spatial communication with the second receiving groove;
• a plurality of limiting structures each located in the receiving groove, and each limiting structure is disposed close to the light source end;
• a longitudinal groove recessed inwardly from the connecting end;
• a lens structure integrally formed with the cap;
• wherein the lens structure is located between the receiving groove and the longitudinal groove, and the lens structure blocks spatial communication between the receiving groove and the longitudinal groove;
• and
• a plurality of pillar structures respectively connected to an inner wall that surrounds the receiving groove;
• and
• a light source module including:
• a light emitting component including a light emitting unit capable of emitting a light beam having a predetermined wavelength;
• a base seat, a side of the base seat being concavely formed with a recess, the light emitting component being fixedly disposed in the base seat, and the light emitting component being located in the recess, wherein the base seat has an annular wall and a bottom plate, and the annular wall is fixedly disposed on a side of the bottom plate;
• and
• a plurality of pins respectively and electrically connected to the light emitting component, and the pins being respectively and electrically connected to the light emitting unit;
• wherein the base seat is disposed in the receiving groove, and each pillar structure is configured to correspondingly abut against a periphery of the base seat such that the base seat is fixedly disposed at the light source end of the cap;
• wherein the light beam emitted from the light emitting component can sequentially pass through the lens structure and the longitudinal groove, and then be emitted outward from the connecting end of the cap;
• wherein an inner diameter of the first receiving groove is the same as an outer diameter of the annular wall, and an inner diameter of the second receiving groove is greater than the inner diameter of the first receiving groove;
• wherein each limiting structure extends from an inner wall that surrounds the second receiving groove toward the inside of the receiving groove, and the limiting structures are spaced apart from each other, and
• wherein when the base seat is fixedly disposed in the cap, the bottom plate abuts against a side of each limiting structure, and the bottom plate, the annular wall and a bottom wall of the second receiving groove commonly form a glue receiving space which can be filled with glue to increase a connecting strength between the base seat and the cap.