Title :
2.5-mW single-mode operation of 1.55-μm buried tunnel junction VCSELs
Author :
Ortsiefer, M. ; Baydar, S. ; Windhorn, K. ; Bohm, G. ; Rosskopf, J. ; Shau, R. ; Ronneberg, E. ; Hofmann, W. ; Amann, M.-C.
Author_Institution :
Vertilas GmbH, Garching, Germany
Abstract :
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.
Keywords :
III-V semiconductors; aluminium compounds; calcium compounds; dielectric materials; gallium arsenide; gold; indium compounds; laser cavity resonators; laser mirrors; laser modes; optical design techniques; optical losses; reflectivity; semiconductor epitaxial layers; semiconductor lasers; surface emitting lasers; zinc compounds; 0.9 V; 1.55 mum; 2.5 mW; 293 to 298 K; 30 to 40 ohm; 5 mum; CaF/sub 2/-ZnS-Au; InGaAlAs-InAlAs; InGaAlAs-InP; InGaAlAs-InP lasers; VCSEL; buried tunnel junction; continuous-wave output power; epitaxial InGaAlAs-InAlAs; high-reflective epitaxial layer; hybrid dielectric layer; low-loss epitaxial layer; mirror design; room temperature; single-mode laser operation; single-mode output power; spectral behavior; Apertures; Dielectrics; Mirrors; Power generation; Power lasers; Surface emitting lasers; Surface waves; Temperature; Threshold current; Vertical cavity surface emitting lasers; InGaAlAs–InP; Long-wavelength vertical-cavity surface-emitting laser (VCSEL); semiconductor laser; tunnel junction;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2005.850905
