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Junichiro YAMASHITA Yoshio MIYAKE Eiichi NAKAGAWA Sho ITOH Hiromitsu WATANABE Yuji SAKAZAKI Hirofumi NAMIZAKI
A DIP type single mode fiber laser diode module assembled by high reliable laser welding process has been developed. The coupling efficiency of this module is 4.7 dB and any degradation has not been recognized after long time heat cycle test.