Abstract
We describe an arrangement for an Yb:YAG thin disk laser, which enables narrow bandwidth operation in single-frequency mode at freely selectable wavelengths within the broad tuning range of the laser. This is facilitated by a combination of a double-stage birefringent filter and an etalon inside the laser cavity. We investigate the wavelength selection characteristics of the single elements as well as their combination. A simple procedure is implemented for a computer-based automation of wavelength tuning. The reflectivity of the partially reflecting resonator mirror is optimised, and the laser pump power is adapted for best tuning performance. Single-frequency emission is achieved in a frequency range of 9.75 THz (wavelength range 1020 nm to 1055 nm). Each axial laser mode in this range can be selected individually. The axial mode separation of 0.47 GHz corresponds to wavelength steps of 1.7 pm at 1030 nm.
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42.55.Xi; 42.60.Fc; 42.60.Lh
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Baum, A., Grebner, D., Paa, W. et al. Axial mode tuning of a single frequency Yb:YAG thin disk laser. Appl. Phys. B 81, 1091–1096 (2005). https://doi.org/10.1007/s00340-005-2028-6
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DOI: https://doi.org/10.1007/s00340-005-2028-6