High optical power pulsed laser structures at 905 nm for automotive LIDAR

M. Krakowski; M. Meghnagi; P. Afuso-Roxo; P. Resneau; E. Izquierdo; C. Theveneau; E. Vinet; Y. Robert; J. P. Legoec; M. Garcia; O. Parillaud; B. Gerard

doi:10.1117/12.2650026

15 March 2023 High optical power pulsed laser structures at 905 nm for automotive LIDAR

M. Krakowski, M. Meghnagi, P. Afuso-Roxo, P. Resneau, E. Izquierdo, C. Theveneau, E. Vinet, Y. Robert, J. P. Legoec, M. Garcia, O. Parillaud, B. Gerard

Author Affiliations +

Proceedings Volume 12440, Novel In-Plane Semiconductor Lasers XXII; 124400J (2023) https://doi.org/10.1117/12.2650026
Event: SPIE OPTO, 2023, San Francisco, California, United States

Abstract

In the area of smart mobility, a major challenge is to insure secure transportation. LIDAR are acknowledged as key enablers for Advanced Driver Assistance Systems (ADAS) and autonomous driving. Our approach for the Time of Flight (ToF) LIDAR is to use an Optical Phase Array (OPA), for the optical beam steering, together with a high peak power and high beam quality laser diode emitting at 905nm. To the best of our knowledge, a high-power laser diode at 905nm directly compatible with an OPA does not exist. We report on the design, realization and characterization of laser diode, with different geometries, emitting several watts (>10W) in a short pulse (typically 10ns) operation, in order to be coupled into the silicon nitride waveguide input of the OPA developed by the CEA LETI. The high power 905nm LASER coupled into the OPA, and their respective drivers, will constitute the optical steerable source, without no moveable parts, of the medium range TOF LIDAR developed within the European VIZTA project. The Aluminum free active region laser structure have been grown by Metal Organic Vapor Phase Epitaxy (MOVPE) on 3” GaAs substrates. It contains a single GaInAsP compressively strained Quantum Well (QW) for emission at 905nm, located in a GaInP waveguide. This structure exhibits high internal quantum efficiency η_qi of 0.99, low internal losses α_i of 1.3cm^-1 and low transparency current density J₀ of 59A/cm². Peak optical powers of 11.4W at 15.4A and 7.7W at 10.2A are obtained, respectively, for two different geometries.

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M. Krakowski, M. Meghnagi, P. Afuso-Roxo, P. Resneau, E. Izquierdo, C. Theveneau, E. Vinet, Y. Robert, J. P. Legoec, M. Garcia, O. Parillaud, and B. Gerard "High optical power pulsed laser structures at 905 nm for automotive LIDAR", Proc. SPIE 12440, Novel In-Plane Semiconductor Lasers XXII, 124400J (15 March 2023); https://doi.org/10.1117/12.2650026

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