Robust method for long-term energy and pointing stabilization of high energy, high average power solid state lasers

0501871 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Boge, Robert - Horáček, Jakub - Mazůrek, Petr - Naylon, Jack A. - Green, Jonathan T. - Hubka, Zbyněk - Šobr, Václav - Novák, Jakub - Batysta, František - Antipenkov, Roman - Bakule, Pavel - Rus, Bedřich
Robust method for long-term energy and pointing stabilization of high energy, high average power solid state lasers.
Review of Scientific Instruments. Roč. 89, č. 2 (2018), s. 1-5, č. článku 023113. ISSN 0034-6748. E-ISSN 1089-7623
Grant CEP: GA MŠMT EF16_019/0000789; GA MŠMT LQ1606
Grant ostatní: OP VVV - ADONIS(XE) CZ.02.1.01/0.0/0.0/16_019/0000789
Institucionální podpora: RVO:68378271
Klíčová slova: long-term energy * stabilization of high energy * long-term stability * intra-cavity mirror
Obor OECD: Optics (including laser optics and quantum optics)
Impakt faktor: 1.587, rok: 2018

A robust and simple method is presented for ensuring constant energy and pointing of a high average power solid state laser on a target. In addition to providing long-term stability, this scheme also eliminates any drifts in energy or pointing resulting from the initial warm-up after a cold start. This is achieved using two separate feedback loops: one loop stabilizes the pointing of the beam external to the amplifier cavity and the other locks the cavity mode to have optimum overlap with the pump spot on the active medium. The key idea of the cavity mode stabilization is to monitor the overlap of the cavity mode and the gain medium with a camera and control it with an actively controlled, intra-cavity mirror. While this method is demonstrated on a thin-disk regenerative amplifier, it can also be applied to a wide variety of solid state laser amplifiers.
Trvalý link: http://hdl.handle.net/11104/0293851