An intracavity photorefractive crystal is used in a cw dye laser. The frequency selection of the grating written in the crystal by the laser’s standing-wave intensity pattern reduces the laser spectrum to a pair of hole-burning modes. The wavelength can be tuned by varying the laser-cavity length. Wavelength scans across an entire gain curve are possible without mode hops.
© 1987 Optical Society of America
J. M. Ramsey and W. B. Whitten, "Controlled scanning of a continuous-wave dye laser with an intracavity photorefractive element," Opt. Lett. 12, 915-917 (1987)