Abstract
We demonstrate a versatile dual-wavelength synchronous mode-locking of a diode-pumped Cr:LiSAF laser for the first time, to our knowledge. A two-color mode-locked operation is achieved by using intracavity birefringent filters (BRFs) or etalons as frequency-selective elements. Using filters with different thicknesses and hence different free spectral ranges (FSRs), wavelength separation in two-color mode-locking could be selected between 1 and 9 nm, with corresponding beating frequencies in the 0.4–3.5 THz range. Moreover, the central wavelength of the two-color output could be tuned smoothly between 840 and 875 nm, only limited by the bandwidth of the semiconductor saturable absorber mirror (SESAM) used for mode-locking. The method, which enables easy adjustment of the central wavelength and beating frequency of a dual-wavelength operation, is suitable for use in other laser gain media as well.
© 2024 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Umit Demirbas, Jelto Thesinga, Martin Kellert, Simon Reuter, Bernd Sumpf, Mikhail Pergament, and Franz X. Kärtner
Appl. Opt. 60(29) 9054-9061 (2021)
O. B. Jensen, A. K. Hansen, M. Chi, and P. Tidemand-Lichtenberg
Opt. Lett. 49(10) 2713-2716 (2024)
Ferda Canbaz, Nurbek Kakenov, Coskun Kocabas, Umit Demirbas, and Alphan Sennaroglu
Opt. Lett. 40(17) 4110-4113 (2015)