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Gain, refractive index, and /spl alpha/-parameter in InGaAs-GaAs SQW broad-area lasers

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2 Author(s)
Bossert, D.J. ; US Air Force Phillips Lab., Kirtland AFB, NM, USA ; Gallant, D.

Gain, refractive index, and the linewidth enhancement factor, or /spl alpha/-parameter, are measured in broad-area InGaAs-GaAs single-quantum-well semiconductor lasers using below-threshold amplified spontaneous emission spectra and a far-field filtering technique. The /spl alpha/ parameter is shown to increase dramatically with increasing carrier density and wavelength. Modes propagating in the transparent substrate of the lasers are shown to have a significant influence on the measured value of /spl alpha/.

Published in:

Photonics Technology Letters, IEEE  (Volume:8 ,  Issue: 3 )

Date of Publication:

March 1996

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