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- W2027856501 abstract "One of the recent advances in solid-state laser (SSL) defense technology is the 100W level Er-doped eye-safe laserwith low quantum defect pumping at 1.53μm. Major technical challenges in achieving high-wattage devices includeincreasing the system power conversion efficiency and arranging the removal of heat from both the crystal and thepumps. It is known that performance of the crystal can be improved dramatically by cryogenic cooling. Hence, it isdesirable to have cryo-cooled pumps to realize ergonomic and efficient diode-pumped SSL with unified cryogeniccooling.In this paper we report on the development of LN2-cooled InP-based λ~1.5-1.6 μm diode pumps. The broad area lasersdemonstrated 11W in continuous-wave (CW) regime at an operating current of 20A. Despite the highest CW powermeasured to date from an InP-based emitter, we did not observe catastrophic optical mirror damage. The spectral widthof the radiation from a cooled device decreased 1.5-2 from its room-temperature value, which will significantly improvepumping efficiency.We show that laser diode design has to be optimized for performance at cryogenic temperatures. Reviewing the data onLN2 cooled lasers emitting in the wavelength range of 1.13 - 1.8 μm, we discuss the route to increase the powerconversion of the LN2 cooled InP-based pumps to greater than 60% and further narrow and stabilize the laser emissionspectrum." @default.
- W2027856501 created "2016-06-24" @default.
- W2027856501 creator A5028255138 @default.
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- W2027856501 date "2008-04-03" @default.
- W2027856501 modified "2023-09-23" @default.
- W2027856501 title "Diode laser pumping sources for cryogenically cooled solid-state lasers" @default.
- W2027856501 doi "https://doi.org/10.1117/12.777417" @default.
- W2027856501 hasPublicationYear "2008" @default.
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