Influence of nonlinear effects on the characteristics of pulsed high-power broad-area distributed Bragg reflector lasers
Opt. Quant. Electron., vol. 50, no. 2, pp. 88 (2018).
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We theoretically analyze the influence of nonlinear effects such as spatial holeburning, two-photon absorption and gain compression on the power-current and beam characteristics of a high-power broad-area distributed Bragg reflector laser with a stripe width of 50 µm operated in pulsed mode and compare them with simulations of a similar Fabry-Pérot laser. On the one hand, spatial holeburning leads to a higher mean intensity within the cavity for a Fabry-Pérot laser and resulting higher losses in combination with two-photon absorption and gain compression, on the other hand, excitation of higher order lateral modes leads to losses through the Bragg grating. In combination with spatiotemporal power variations resolved by the utilized time-dependent traveling wave model two-photon absorption leads to higher power losses compared to those models using averaged powers.
1 Ferdinand-Braun-Institut, Leibniz-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, 12489 Berlin, Germany
2 Weierstrass Institute for Applied Analysis and Stochastics, Mohrenstr. 39, 10117 Berlin, Germany
High-power lasers, Broad-area lasers, DBR lasers, Traveling wave model, Nonlinear effects, Spatial holeburning, Two-photon absorption, Gain compression.