Title :
High-speed characteristics of low-optical loss oxide-apertured vertical-cavity lasers
Author :
Thibeault, B.J. ; Bertilsson, K. ; Hegblom, E.R. ; Strzelecka, E. ; Floyd, P.D. ; Naone, R. ; Coldren, L.A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
Abstract :
We characterize the high-speed modulation properties of thin-oxide-apertured vertical-cavity lasers. The modulation response scales with device diameter due to the negligible optical scattering loss present in these devices. A small diameter laser of 3.1 μm has a maximum 3-dB bandwidth of 15.2 GHz at a bias of only 2.1 mA. Modeling indicates a no-parasitic bandwidth of 18.2 GHz at this current level, with an intrinsic 3-dB bandwidth limit of 45 GHz due to gain compression. The present devices are limited by parasitic capacitance across the thin oxide layer.
Keywords :
distributed Bragg reflector lasers; high-speed optical techniques; laser cavity resonators; light scattering; optical losses; optical modulation; quantum well lasers; 15.2 GHz; 18.2 GHz; 2.1 mA; 3.1 mum; 45 GHz; AlGaAs-GaAs; bandwidth; bias; current level; device diameter; gain compression; high-speed characteristics; high-speed modulation properties; intrinsic 3-dB bandwidth limit; low-optical loss oxide-apertured vertical-cavity lasers; modeling; modulation response; optical scattering loss; parasitic capacitance; small diameter laser; Apertures; Bandwidth; Bonding; Dielectric losses; Laser modes; Molecular beam epitaxial growth; Optical losses; Optical scattering; Threshold current; Vertical cavity surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
