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High-power cw operation over 480 mW on five-stripe phased-array lasers assembled by a new junction-down mounting

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Abstract

The phased-array laser is the most promising candidate to give high output power over 100 mW. At high-power cw operation, the output power-current characteristics tend to saturate because the Junction temperature rises due to the high current. Hence the junction-down (J-down) mounting is important in achieving high-power cw operation. Generally, soft solders such as In alloys have been employed for the J-down assembly to avoid the mechanical stress between laser chip and heat sink. These solders, however, have many disadvantageous effects on reliability, such as solder migration into the laser crystal or formation of whisker.1,2

© 1986 Optical Society of America

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