A tunable laser is a laser whose wavelength of operation can be altered in a controlled manner. While all laser gain media allow small shifts in output wavelength, only some types of lasers allow continuous tuning over a significant wavelength range.
A tunable laser is a laser whose wavelength of operation can be altered in a controlled manner. While all laser gain media allow small shifts in output wavelength, only some types of lasers allow continuous tuning over a significant wavelength range.
Source: Wikipedia "Tunable laser" · CC BY-SA 4.0
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