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- W2752047553 abstract "Quantum Cascade Lasers represent one of the most significant recent advances in solid state lasers. Their ability to generate mid-IR through THz wavelengths have found numerous application in IR Countermeasures and Remote Sensing for defence, security, and commercial application. In many practical defence and security applications, to achieve the required power levels, it may become desired to combine several beams to form a single focused beam. This paper examines both coherent and incoherent beam combining, and the effects imposed by atmospheric turbulence on the propagation of these combined beams. Here, beam centroid wander and beam spread are analyzed along with their eventual contribution to laser spot size to obtain energy/power on target at range for varying turbulence levels. Interestingly, it is found that there is little difference between the energy/power delivered to a target whether beams are coherently or incoherently combined. Additionally, it is found that there is a maximum intensity that can be propagated to a target that is independent of initial beam quality and size for km-type ranges and at moderate turbulence levels." @default.
- W2752047553 created "2017-09-15" @default.
- W2752047553 creator A5038897315 @default.
- W2752047553 date "2017-08-31" @default.
- W2752047553 modified "2023-09-25" @default.
- W2752047553 title "Atmospheric propagation of coherently and incoherently combined quantum cascade lasers" @default.
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- W2752047553 doi "https://doi.org/10.1117/12.2275867" @default.
- W2752047553 hasPublicationYear "2017" @default.
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