Photonics West 2024 Preview
Technical Session
Compact-Lightweight Fiber-Coupled Diode Pump Source Using a Bar Approach
January 30 at 9:50 am | Moscone Center, Room 205 (Level 2 South)
Presenter: Jenna Bergevin, Leonardo Electronics US Inc.
Abstract: The size and weight of a fiber laser source are important metrics. A bar approach has the potential for making a lighter, more compact apparatus. We will show results from the development of a bar-based fiber coupled diode source resulting in approximately 500W of power from a 231 um core 0.22 NA fiber, wavelength locked at 976 nm. The resulting weight metric is 0.38 g/W and volume metric 0.30 cm3/W, the lowest such values for comparable power fiber-coupled diodes to the best of our knowledge.
Aging Mechanisms of Broad Area High-Power Approximately 800 nm Laser Diodes
January 28 at 3:40 pm | Moscone Center, Room 205 (Level 2 South)
Presenter: Elaine McVay, Lawrence Livermore National Lab. (Co-authored with Leonardo Electronics US)
Abstract: The effect of oxygen defects on the gradual degradation rates of power and nonradiative carrier recombination in ~800 nm laser diodes was studied experimentally. While intentional introduction of oxygen at low levels (<5×10^15 cm^-3) was observed to degrade lasing performance prior to aging, no variation in gradual degradation rate of lasing power was observed. This suggests that degradation in these devices is not due to nonradiative recombination at low levels of point defects. Simulation of our data indicates that the power degradation may arise from increased intracavity absorption.
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