We describe a simple electro-optically activated external-cavity diode laser designed to provide high-speed, high-coherence tuning over gigahertz frequency ranges. Tuning as fast as 23 GHz/ µs is demonstrated. Coherence measurements indicate transform-limited quiescent laser linewidth in observation windows as wide as ~100 µs and transform-limited chirps. A self-heterodyne, cross-correlation-based coherence diagnostic is developed for characterizing phase coherence during high-speed chirps.
© 1998 Optical Society of America
(030.1640) Coherence and statistical optics : Coherence
(140.2020) Lasers and laser optics : Diode lasers
(140.3600) Lasers and laser optics : Lasers, tunable
(320.1590) Ultrafast optics : Chirping
(320.7090) Ultrafast optics : Ultrafast lasers
B. Boggs, C. Greiner, T. Wang, H. Lin, and T. W. Mossberg, "Simple high-coherence rapidly tunable external-cavity diode laser," Opt. Lett. 23, 1906-1908 (1998)