In this study, a novel technique (TO-Butterfly package) for butterfly-type laser module packaging based on the coaxial type structure is proposed. By applying the low cost TO packaging technique, the cost and fabrication time can be reduced, and the yield rate can be increased. The achievement can be employed to package the novel butterfly-type laser module in the fiber optics communication.
In traditional butterfly-type module package, the PWS was large while saddle clip and fiber ferrule being jointed by laser welding after the fiber ferrule and laser being aligned. Therefore, the coupling efficiency and the yield rate are low with long fabrication time. On the contrary, the TO-Butterfly package, similar to TO-Can laser module, includes upper part and lower part. The direction of the main PWS in TO-Butterfly laser module parallels to the optical axis, in which direction the components are constrained. Therefore, the PWS takes less influence on the coupling efficiency. Furthermore, the aligning process between the fiber and the laser and laser welding process is completed on Newport LW4000 workstation to build up a TO-Butterfly TOSA. After that, the TO-Butterfly TOSA is taken out of the workstation and combined with the case through solder. As a result, the fabrication time can be reduced to one-third. And the coupling efficiency and yield rate can also be improved.
After several times of process modification, the coupling efficiency of the 19 TO-Butterfly TOSA modules by applying the novel packaging technology was all over 70%. The average and the highest coupling efficiency were 81.3% and 95.7%, respectively, and the standard deviation was 6.5%.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0727110-155905 |
| Date | 27 July 2010 |
| Creators | Hung, Chen-Hsu |
| Contributors | Jao-Hua Kuang, Yi-Cheng Hsu, Ying-Chien Tsai, Wood-Hi Cheng, Maw-Tyan Sheen |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0727110-155905 |
| Rights | campus_withheld, Copyright information available at source archive |
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