8 February 2012 External-cavity high-power dual-wavelength tapered amplifier with tunable THz frequency difference
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Abstract
A tunable 800 nm high-power dual-wavelength diode laser system with double-Littrow external-cavity feedback is demonstrated. The two wavelengths can be tuned individually, and the frequency difference of the two wavelengths is tunable from 0.5 to 5.0 THz. A maximum output power of 1.54 W is achieved with a frequency difference of 0.86 THz, the output power is higher than 1.3 W in the 5.0 THz range of frequency difference, and the amplified spontaneous emission intensity is more than 20 dB suppressed in the range of frequency difference. The beam quality factor M2 is 1.22±0.15 at an output power of 1.35 W. The simultaneous oscillation of the two wavelengths is under test by the sumfrequency generation experiment in a bismuth triborate (BIBO) nonlinear crystal.
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Mingjun Chi, Ole Bjarlin Jensen, Paul Michael Petersen, "External-cavity high-power dual-wavelength tapered amplifier with tunable THz frequency difference", Proc. SPIE 8241, High-Power Diode Laser Technology and Applications X, 824114 (8 February 2012); doi: 10.1117/12.908248; https://doi.org/10.1117/12.908248
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