19 February 2018 Reflectors and tuning elements for widely-tunable GaAs-based sampled grating DBR lasers
Author Affiliations +
Widely-tunable lasers without moving parts are attractive light sources for sensors in industry and biomedicine. In contrast to InP based sampled grating (SG) distributed Bragg reflector (DBR) diode lasers which are commercially available, shorter wavelength GaAs SG-DBR lasers are still under development. One reason is the difficulty to integrate gratings with coupling coefficients that are high enough for functional grating bursts with lengths below 10 μm. Recently we have demonstrated > 20 nm wide quasi-continuous tuning with a GaAs based SG-DBR laser emitting around 975 nm. Wavelength selective reflectors are realized with SGs having different burst periods for the front and back mirrors. Thermal tuning elements (resistors) which are placed on top of the SG allow the control of the spectral positions of the SG reflector combs and hence to adjust the Vernier mode. In this work we characterize subsections of the developed SG-DBR laser to further improve its performance. We study the impact of two different vertical structures (with vertical far field FWHMs of 41° and 24°) and two grating orders on the coupling coefficient. Gratings with coupling coefficients above 350 cm-1 have been integrated into SG-DBR lasers. We also examine electronic tuning elements (a technique which is typically applied in InP based SG-DBR lasers and allows tuning within nanoseconds) and discuss the limitations in the GaAs material system
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
O. Brox, O. Brox, H. Wenzel, H. Wenzel, P. Della Case, P. Della Case, M. Tawfieq, M. Tawfieq, B. Sumpf, B. Sumpf, M. Weyers, M. Weyers, A. Knigge, A. Knigge, } "Reflectors and tuning elements for widely-tunable GaAs-based sampled grating DBR lasers", Proc. SPIE 10553, Novel In-Plane Semiconductor Lasers XVII, 1055310 (19 February 2018); doi: 10.1117/12.2287413; https://doi.org/10.1117/12.2287413


New directions in GaN photonics
Proceedings of SPIE (February 28 2016)
Tilted cavity laser (Critical Review Lecture)
Proceedings of SPIE (August 01 2004)
Power scaling of cw and pulsed IR and mid IR...
Proceedings of SPIE (February 21 2011)
Grazing-incidence-slab semiconductor laser (GRISSL)
Proceedings of SPIE (February 04 2008)

Back to Top