Efficient continuous wave second harmonic generation of 872 nm diode laser radiation using KNbO3 with high stability. (22nd August 2017)

• Record Type: Journal Article
• Authors: Rein, Benjamin; Heck, Johanna; Walther, Thomas
• Is Part Of: Laser physics letters. Volume 14:Number 9(2017:Sep.)
• Publication Date: 2017-08-22
• Subjects: diode laser -- tapered amplifier -- second harmonic generation -- frequency stabilization -- linewidth measurement; Lasers -- Periodicals; Physics -- Periodicals; 621.366
• DOI: 10.1088/1612-202X/aa7f0b
• Languages: English
• ISSNs: 1612-2011

Abstract

Abstract: We report on a highly stable laser system at a wavelength of 436 nm for the coherent excitation of the 6 3 P 1 ↔ 7 3 S 1 transition in mercury based on efficient second harmonic generation in a potassium niobate crystal. The system delivers up to 220 mW of blue light with a peak-to-peak stability of 2.3%. This stability is achieved by setting the whole build-up cavity inside a massive and temperature stabilized aluminum block. Absolute frequency stability to 480 kHz peak-to-peak is achieved by polarization spectroscopy. With a short time linewidth of 59.9 kHz and a tunability of more than 6 GHz the system is suitable for experiments requiring coherent excitation as well as applications in spectroscopy.