Abstract
The output of two grating-stabilized external-cavity diode lasers was injected into a semiconductor tapered amplif ier in a master oscillator-power amplif ier (MOPA) configuration. At a wavelength of 671 nm this configuration produced 210 mW of power in a diffraction-limited mode with two frequency components of narrow linewidth. The frequency difference delta was varied from 20 MHz to 12 GHz, while the power ratio of the two components was freely adjustable. For delta < 2 GHz additional frequency sidebands appear in the output of the MOPA. This configuration is a f lexible and simple high-power cw laser source for light with multiple narrow-linewidth frequency components.
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