Title :
High-speed directly-modulated lasers with photon-photon resonance
Author :
Dumitrescu, M. ; Telkkälä, J. ; Karinen, J. ; Viheriälä, J. ; Laakso, A. ; Afzal, S. ; Reithmaier, J.P. ; Kamp, M. ; Melanen, P. ; Uusimaa, P. ; Gready, D. ; Eisenstein, G.
Author_Institution :
Optoelectron. Res. Centre, Tampere Univ. of Technol., Tampere, Finland
Abstract :
The epitaxial overgrowth, employed in the fabrication of conventional buried gratings, is avoided by using lateral corrugations of the ridge-waveguide as surface gratings, thus decreasing the fabrication complexity, increasing the yield and reducing the fabrication cost of distributed feedback and distributed Bragg reflector edge-emitting lasers. Single-and multiple-contact edge-emitting lasers with laterally-corrugated ridge waveguide gratings have been developed both on GaAs and InP substrates with the aim to exploit the photon-photon resonance in order to extend their direct modulation bandwidth. The characteristics of such surface-grating-based lasers emitting both at 1.3 and 1.55 μm are presented, including photon-photon-resonance-extended small-signal modulation bandwidth in excess of 20 GHz achieved with a 1.6 mm long single-contact device under direct modulation. Similarly structured devices, with shorter lengths are expected to exceed 40 GHz small-signal modulation bandwidth under direct modulation.
Keywords :
Bragg gratings; distributed Bragg reflector lasers; distributed feedback lasers; integrated optics; laser cavity resonators; optical fabrication; optical modulation; ridge waveguides; semiconductor lasers; surface emitting lasers; waveguide lasers; GaAs; InP; conventional buried grating fabrication; distributed Bragg reflector edge-emitting lasers; distributed feedback lasers; epitaxial overgrowth; high-speed directly-modulated lasers; laterally-corrugated ridge waveguide gratings; multiple-contact edge-emitting lasers; photon-photon resonance; single-contact edge-emitting lasers; size 1.6 mm; small-signal modulation bandwidth; structured devices; surface-grating-based lasers; wavelength 1.3 mum; wavelength 1.55 mum; Bandwidth; Distributed feedback devices; Fabrication; Gratings; Modulation; Power lasers; Surface emitting lasers;
Conference_Titel :
Compound Semiconductor Week (CSW/IPRM), 2011 and 23rd International Conference on Indium Phosphide and Related Materials
Conference_Location :
Berlin
Print_ISBN :
978-1-4577-1753-6
Electronic_ISBN :
978-3-8007-3356-9