CC BY 4.0 UnportedStrotkamp, MichaelMunk, AlexanderJungbluth, BerndHoffmann, Hans-DieterHöffner, Josef2022-10-102022-10-102019https://oa.tib.eu/renate/handle/123456789/10234http://dx.doi.org/10.34657/9270In this work, the design of a diode-pumped Alexandrite ring laser in Q-switched single-longitudinal-mode (SLM) operation for a spaceborne lidar mission is presented. The laser is pumped by a self-developed fiber-coupled laser diode pump device and yields a pulse energy of 1.7 mJ at a repetition rate of 500 Hz with an excellent beam quality of M2 < 1.1. By seeding the resonator with a narrow band diode laser, SLM operation with a linewidth of approximately 10 MHz is achieved. The electro-optical efficiency of 2% is the highest achieved for all Alexandrite lasers in SLM operation and reasonable for space operation. The performance analysis as well as benchmarking with the space-qualified mounting technology points out the TRL and the remaining effort for the development of the technology. An estimation of the requirements for a spaceborne resonance lidar mission underlines the suitability of such a lidar system with a diode-pumped Alexandrite laser as the beam source.enghttps://creativecommons.org/licenses/by/4.0/620Alexandrite laserDiode-pumped laserLidarQ-switched laserRing laserSingle-longitudinal-mode laserSpaceborne laserTunable laserArticle