High Power 1.5 μm pulsed semiconductor laser design with a bulk active layer and an asymmetric waveguide

InGaAsP/InP high pulsed power lasers operating in the range of 1.3–1.6 μm have been intensely studied recently, with LIDAR technology being the primary application. We present and analyse a design with a bulk active layer which has a large refractive index step with respect to the optical confinement layer and is located close to the p-cladding. It is shown that such lasers can allow a noticeable performance increase over the state of the art. The dependence of the laser performance on the design parameters including the thicknesses of the active layer and the waveguide, the cavity length, and the waveguide asymmetry, is analysed. It is shown that short cavity lengths (~1 mm or even shorter) can be used in the design considered for achieving high pulsed power. Due to the significant waveguiding properties of the active layer, the use of both symmetric and asymmetric waveguide designs is possible, with only slightly higher output predicted for the asymmetric one. Both designs allow operation with a single, broad transverse mode enabling high brightness.

Authors:
Ryvkin Boris S., Avrutin Eugene A., Hallman Lauri W., Kostamovaara Juha T.

Publication type:
A4 Article in conference proceedings

Place of publication:
22nd International Conference on Transparent Optical Networks, ICTON 2020, 19-23 July 2020, Bari, Italy

Keywords:
eye safe lasers, high power lasers, laser efficiency, semiconductor lasers

Published:

Full citation:
B. S. Ryvkin, E. A. Avrutin, L. W. Hallman and J. T. Kostamovaara, “High Power $1.5 mu mathrm{m}$ Pulsed Semiconductor Laser Design with a Bulk Active Layer and an Asymmetric Waveguide,” 2020 22nd International Conference on Transparent Optical Networks (ICTON), Bari, Italy, 2020, pp. 1-4, doi: 10.1109/ICTON51198.2020.9203550

DOI:
https://doi.org/10.1109/ICTON51198.2020.9203550

Read the publication here:
http://urn.fi/urn:nbn:fi-fe2020111890942