Laurain Alexandre, Mart Cody, Hader Jörg, Moloney Jerome V, Kunert Bernadette, Stolz Wolfgang
Opt Lett. 2014 Mar 15;39(6):1573-6. doi: 10.1364/OL.39.001573.
We present a study of an actively stabilized optically pumped semiconductor laser operating single frequency at a wavelength of 1015 nm. In free running operation, the laser exhibits a single frequency output power of 15 W with a linewidth of 995 kHz for a sampling time of 1 s. The intensity and the frequency of the laser were independently stabilized to reach a laser linewidth of only 4 kHz for the same sampling time. To identify and reduce the different sources of noise, the relative intensity noise and frequency noise spectral density are investigated under various conditions.
