The most efficient quantum cascade laser ever designed have now been created by researchers who have done it in a way that makes the lasers easier to manufacture. Quantum cascade lasers, or QCLs, are tiny — smaller than a grain of rice — but they pack a punch. Compared to traditional lasers, QCLs offer higher power output and can be tuned to a wide range of infrared wavelengths. They can also be used at room temperature without the need for bulky cooling systems.

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