All-fiber airtight packaging structure and method with semiconductor saturable absorber mirror

An all-fiber airtight packaging method with semiconductor saturable absorber mirror, comprising following steps:

• S1, removing coating of an optical fiber and wiping the optical fiber clean, then filling thermal curing adhesives in a central hole of a ceramic optical fiber ferrule, and inserting the optical fiber without coating into the central hole of the ceramic optical fiber ferrule to form a ceramic optical fiber ferrule connector, heating and curing the ceramic optical fiber ferrule connector, and smoothing the output end of the ceramic optical fiber ferrule connector;
• S2, smearing heat-conducting silicone rubber evenly on a TEC chilling plate placement area which is set in a sealing shell, putting a TEC chilling plate on the TEC chilling plate placement area, and respectively connecting two TEC chilling plate wiring pins with two sealing shell wiring pins on the sealing shell;
• S3, smearing sealant evenly on a surface of a SESAM fixed area which is set on a SESAM fixed block, then putting a SESAM on the central position of the SESAM fixed area and pasting the SESAM on the SESAM fixed area;
• S4, smearing heat-conducting silicone rubber on a surface of the TEC chilling plate, then putting the SESAM fixed block of step S3 on the TEC chilling plate and fixing the SESAM fixed block in the sealing shell by bolts;
• S5, fixing the ceramic optical fiber ferrule connector of step S1 by a multidimensional adjusting bracket, aligning the output end of the ceramic optical fiber ferrule connector to a surface of the SESAM, and then inserting the ceramic optical fiber ferrule connector into a sealing shell central hole which is defined in the sealing shell, connecting a tail fiber of the ceramic optical fiber ferrule connector to a mode-locked fiber laser cavity, adjusting the multidimensional adjusting bracket to make the output end of the ceramic optical fiber ferrule connector getting closer to the surface of the SESAM, meanwhile, changing the angle between the output end of the ceramic optical fiber ferrule connector and the surface of the SESAM until reaching a laser mode locked status;
• S6, filling a gap between the ceramic optical fiber ferrule connector and the sealing shell central hole with ultraviolet curing adhesives, curing the ultraviolet curing adhesives by ultraviolet light;
• S7, putting the sealing shell of step S6 in a dry environment, and then sealing the sealing shell by welding a cover plate on a surface of the sealing shell.