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2.5-mW single-mode operation of 1.55-μm buried tunnel junction VCSELs

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9 Author(s)
Ortsiefer, M. ; Vertilas GmbH, Garching, Germany ; Baydar, S. ; Windhorn, K. ; Bohm, G.
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We present 1.55-μm wavelength buried tunnel junction InGaAlAs-InP vertical-cavity surface-emitting lasers with low threshold current and high efficiency. An improved mirror design is accomplished with high-reflective low-loss epitaxial InGaAlAs-InAlAs and hybrid dielectric CaF2-ZnS-Au layer stacks, respectively. Lasers with aperture diameters of only around 5 μm exhibit continuous-wave single-mode output powers at room temperature well beyond 2 mW. Threshold voltages and series resistances as low as 0.9 V and 30-40 /spl Omega/ have been measured. The spectral behavior shows excellent performance over the relevant current and temperature range.

Published in:

Photonics Technology Letters, IEEE  (Volume:17 ,  Issue: 8 )