Diode-pumped Q-switched Alexandrite laser in single longitudinal mode operation with Watt-level output power

Munk, Alexander; Strotkamp, Michael; Walochnik, Martin; Jungbluth, Bernd; Traub, Martin; Hoffmann, Hans-Dieter; Poprawe, Reinhart; Höffner, J.; Lübken, Franz‐Josef

doi:10.1364/ol.43.005492

Cited by 23 publications

(12 citation statements)

References 12 publications

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“…4a. It is noticeable that the pulse energy of the laser is slightly higher than the energy measured in [20], although the pump energy deposited into the crystal is 25% lower. The resulting optical-optical efficiency of the laser with the fiber-coupled pump device is 9.7% and thus 30% higher than without fiber coupling of the pump radiation.…”

Section: Resultsmentioning

confidence: 71%

“…The backfolded light is absorbed on its way back through the crystal and guarantees a homogenously pumped crystal. A similar approach is presented in [20] and [21].…”

Section: Pump Opticsmentioning

confidence: 99%

“…To overcome these drawbacks, the two pump modules are polarization coupled and symmetrized by means of step mirrors [22] to balance the beam qualities and provide a round pump beam cross section. A detailed description of the optical setup can be found in [20]. The optics design and optomechanical setup are based on off-the-shelf components and have not yet been optimized for compactness or transmission efficiency.…”

Section: Pump Opticsmentioning

confidence: 99%

“…Since the resonator design presented in [20] yielded good experimental results, the design is unchanged for the resonator in this publication, with the exception of the separation of the pump and resonator unit due to the fiber-coupled pump device. The laser resonator is schematically shown in Fig.…”

Section: Laser Designmentioning

confidence: 99%

“…One hopeful approach to overcome these drawbacks is by replacing the flashlamps with diode lasers [14,15]. Recently, new basic investigations in the field of diode-pumped Alexandrite lasers have been conducted with focus on altimetry lidar and vegetation monitoring (red edge) [16] and resonance lidar [17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

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Diode-pumped Alexandrite laser for next generation satellite-based earth observation lidar

et al. 2019

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In 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 M 2 < 1.1. By seeding the resonator with a narrow band diode laser, SLM operation with a linewidth of approximately 10 MHz is achieved. The electrooptical 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.

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Section: Resultsmentioning

confidence: 71%

“…The backfolded light is absorbed on its way back through the crystal and guarantees a homogenously pumped crystal. A similar approach is presented in [20] and [21].…”

Section: Pump Opticsmentioning

confidence: 99%