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3.6-MHz linewidth 1.55-μm monomode vertical-cavity surface-emitting laser

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10 Author(s)
Signoret, P. ; CEM2, Univ. des Sci. et Tech. du Languedoc, Montpellier, France ; Marin, F. ; Viciani, S. ; Belleville, G.
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We report on high-resolution linewidth measurement of proton-implanted bottom-emitting InGaAsP long-wavelength vertical-cavity surface-emitting lasers (VCSELs) employing the heterodyne method. Devices with 35-μm active diameter exhibit record linewidths of 3.6 MHz and negligible extrapolated linewidth for infinite power, at room temperature. This result relies on the long-cavity-designed VCSEL. The linewidth enhancement factor is also determined: /spl alpha//spl ap/2.1.

Published in:

Photonics Technology Letters, IEEE  (Volume:13 ,  Issue: 4 )