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Low-threshold inGaAsP ridge-waveguide laser fabricated by a new contacting system

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3 Author(s)
Mÿller, G. ; Technische Universitÿt Mÿnchen, Lehrstuhl fÿr Allgemeine Elektrotechnik und Angewandte Elektronik, Mÿnchen, West Germany ; Hartl, E. ; Honsberg, M.

A new type of index-guided laser, the bridge-contacted ridge-waveguide (BCRW) laser, is reported. Without the use of any sophisticated fabrication processes, CW threshold currents of 28 mA and quantum efficiencies of 60% are obtained for 3 ¿m-wide and 200 ¿m-long devices. In the last processing step the lateral index-guiding properties of this structure can be adjusted within a wide range. It is demonstrated that strong passive waveguiding results in both monomode emission and a narrow single-lobed far-field pattern, even for high injection currents.

Published in:

Electronics Letters  (Volume:22 ,  Issue: 10 )

Date of Publication:

May 8 1986

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