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Long-wavelength InP-based quantum-dash lasers

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4 Author(s)
Schwertberger, R. ; Technische Phys., Wurzburg Univ., Germany ; Gold, D. ; Reithmaier, J.P. ; Forchel, A.

Self-assembled InAs quantum-dash (QD) lasers with emission wavelengths between 1.54 and 1.78 /spl mu/m based on the AlGaInAs-AlInAs-InP material system were grown by gas source molecular beam epitaxy. Threshold current densities below 1 kA/cm/sup 2/ were achieved for 1-mm-long mirror coated broad area lasers with a stack of four QD layers. The devices can be operated up to 80/spl deg/C in pulsed mode and show a high T/sub 0/ value of 84 K up to 35/spl deg/C. In comparison to quantum-well lasers a much lower temperature sensitivity of the emission wavelength was achieved. The temperature shift of /spl Delta//spl lambda///spl Delta/T = 0.12 nm/K is as low as that caused by the refractive index change.

Published in:

Photonics Technology Letters, IEEE  (Volume:14 ,  Issue: 6 )

Date of Publication:

June 2002

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