Two single-mode laser diodes have been injection locked to the +1 and −1 diffracted orders of a 4.6-GHz acousto-optical modulator. The measured locking bandwidth was 3 GHz for a locking gain of 35 dB. The microwave signal at 9.2 GHz had a measured linewidth of less than a few hertz. We used this system to drive stimulated Raman transitions between the cesium ground-state hyperfine levels. We observed Ramsey fringes and used them to characterize the microwave signal phase noise.
© 1996 Optical Society of America
P. Bouyer, T. L. Gustavson, K. G. Haritos, and M. A. Kasevich, "Microwave signal generation with optical injection locking," Opt. Lett. 21, 1502-1504 (1996)