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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.
Junichiro YAMASHITA Akihiro ADACHI Shinichi KANEKO Tsutomu HASHIMOTO
Coupling optics for a monolithic array LD module has been developed. High efficient and small sized confocal optics with aspheric lenses based on hyperbolic surfaces has been designed to achieve the uniformity of coupling loss. A small sized (7.2 cc) 4 channel array LD module with this optics was fabricated. This module has low (4.2 dB) and uniform (0.5 dB) coupling loss.