Abstract

Tunable dual-wavelength operation of a diode laser system based on a tapered diode amplifier with double-Littrow external-cavity feedback is demonstrated around 800nm. The two wavelengths can be tuned individually, and the frequency difference of the two wavelengths is tunable from 0.5 to 5.0THz. An output power of 1.54W is achieved with a frequency difference of 0.86THz, the output power is higher than 1.3W in the 5.0THz range of frequency difference, and the amplified spontaneous emission intensity is more than 20dB suppressed in the range of frequency difference. To our knowledge, this is the highest output power from a dual-wavelength diode laser system operating with tunable terahertz frequency difference.

© 2011 Optical Society of America

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