Topic summary
Diode laser
Extracted from the Wikipedia article Laser diode.
External-cavity diode lasers
External-cavity diode lasers (ECDLs) are tunable lasers which utilize a resonant optical cavity to feed light back to the laser. The first external-cavity diode lasers used intracavity etalons and simple tuning Littrow gratings. Other designs include gratings in grazing-incidence configuration, multiple-prism grating configurations, and piezo-transduced diode laser configuration.