An external cavity has been developed for use with commercial diode lasers. It uses a diffraction grating at grazing incidence for wavelength selection and output coupling. This configuration allows a GaAlAs diode laser to be tuned conveniently anywhere in a range greater than 20 nm. Also, the linewidth is reduced by a factor of more than 1000 from 40 MHz to less than 10 kHz. The new laser system should be useful for high-resolution spectroscopy, laser cooling of atoms, time standards, and coherent optical communications.
© 1991 Optical Society of America
Original Manuscript: January 14, 1991
Published: June 15, 1991
K. C. Harvey and C. J. Myatt, "External-cavity diode laser using a grazing-incidence diffraction grating," Opt. Lett. 16, 910-912 (1991)