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Terahertz difference-frequency generation in quantum cascade lasers with high conversion efficiency

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Room-temperature, narrow-linewidth terahertz quantum cascade laser sources based on intracavity Cherenkov difference-frequency generation with emission at 3.5 THz, nearly 60µW power output, and conversion efficiency of approximately 0.55 mW/W2 are reported.

© 2013 Optical Society of America

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