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Structural dependence of 1.3-μm narrow-beam lasers fabricated by selective MOCVD growth

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7 Author(s)
Kasukawa, A. ; R&D Labs., Furukawa Electr. Co. Ltd., Yokohama, Japan ; Nishikata, K. ; Yamanaka, N. ; Arakawa, S.
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The effect of structural parameters on the lasing characteristics of 1.3-μm narrow beam lasers has been investigated. Monolithically integrated vertically tapered multiquantum-well (MQW) waveguide, fabricated by use of selective metal-organic chemical vapor deposition (MOCVD), is used for the expansion of the optical spot size. It is experimentally shown that the energy separation between the gain and waveguide regions that is formed simultaneously by selective MOCVD is shown to be an important parameter in order to achieve low-threshold current density and good temperature characteristics. The lengths of gain and waveguide regions have been investigated in terms of temperature characteristics of threshold current and far-field angle. A lower threshold current density and a higher characteristic temperature were obtained for longer gain region, We also have estimated the waveguide loss of the mode-field converter lasers diodes (MFC-LD's). High performance of 1.3-μm integrated vertically tapered waveguide lasers were achieved in an optimized device

Published in:

Selected Topics in Quantum Electronics, IEEE Journal of  (Volume:3 ,  Issue: 6 )

Date of Publication:

Dec 1998

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