Abstract

We demonstrate direct microwave modulation of diode lasers operated with optical feedback from a diffraction grating. We obtain substantial fractions of the laser power (2–30%) in a single sideband at frequencies as high 6.8 GHz with 20 mW of microwave power and simple inefficient microwave coupling. Using a single diode as modulated at 6.6 GHz, we trapped 87Rb atoms in a vapor cell. With only 10 mW of microwave power we laser trapped 85% as many atoms as were obtained by using two lasers in the conventional manner.

© 1993 Optical Society of America

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