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Improved high-temperature characteristics in a thickness-tapered 1.3-μm beam-expander integrated ridge-waveguide laser

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8 Author(s)
Sato, H. ; Central Res. Lab., Hitachi Ltd., Tokyo, Japan ; Aoki, M. ; Tsuchiya, T. ; Komori, M.
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High-temperature performance of a beam-expander (BEX) integrated laser was dramatically improved by reducing the current leakage in both longitudinal and lateral directions. Proton implantation into the BEX region and a reverse-mesa structure were combined to improve the high-temperature characteristics. A threshold current of 23.1 mA at 85/spl deg/C and a very high-characteristic temperature T/sub 0/ (25/spl deg/C-85/spl deg/C) of 74 K were achieved. Stable operation for over 3000 h under a 10-mW output power at 70/spl deg/C were confirmed.

Published in:

Photonics Technology Letters, IEEE  (Volume:10 ,  Issue: 4 )