A quantitative postweld shift measurement and compensation technique in butterfly laser module packages

作者：Hsu, Yi Cheng^*; Tsai, Yin Chien; Kuang, Jao Hwa; Hung, Yu Sin; Cheng, Wood Hi

来源：Japanese Journal of Applied Physics, 2008, 47(9): 7166-7172.

DOI：10.1143/JJAP.47.7166

• postweld shift
• laser welding
• butterfly-type laser module
• fiber alignment shift

A quantitative postweld shift (PWS) measurement and compensation technique employing a high-magnification camera with image capturing system (HMCICS) in butterfly-type laser module packages is investigated. The results show that the direction and magnitude of the fiber alignment shifts induced by the PWS in laser-welded butterfly-type laser module packaging can be quantitatively determined and compensated. The measured coupling powers in laser module packages after welding and compensation were clearly confirmed the measured fiber shifts that determined by the translational and rotational parameters. Therefore, the fiber shifts due to the PWS could be realigned back closer to their original optimum position after applying, welding compensation, and hence the coupling lowers loss due to the PWS could be regained. In comparison With previous studies of the PWS compensation by the swell-known mechanical adjustment through to qualitative estimation technique. this HMCICS technique has successfully provided the mechanical adjustment through a quantitative compensation to the effect of the PWS on the fiber alignment shifts in butterfly-type laser module packages. The reliable butterfly-type laser modules with high yield used in lightwave transmission systems can be developed and fabricated.

• 出版日期2008-9
• 单位中山大学