Axial mode tuning of a single frequency Yb:YAG thin disk laser |
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Authors: | A Baum D Grebner W Paa W Triebel M Larionov A Giesen |
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Institution: | (1) Institut für Physikalische Hochtechnology (IPHT), Albert-Einstein-Strasse 9, 07745 Jena, Germany;(2) Institut für Strahlwerkzeuge (IFSW), Pfaffenwaldring 43, 70569 Stuttgart, Germany |
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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.
PACS 42.55.Xi; 42.60.Fc; 42.60.Lh |
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Keywords: | |
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