1 W tunable near diffraction limited light from a broad area laser diode in an external cavity with a line width of 1.7 MHz

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• 作者：Andreas Jechow ; Volker Raab ; Ralf Menzel ; Michael Cenkier ; S ; ra Stry ; Joachim Sacher
• 关键词：Semiconductor laser ; Optical injection ; Chaos communication ; Bandwidth
• 刊名：Optics Communications
• 出版年：2007
• 出版时间：1 September 2007
• 年：2007
• 卷：277
• 期：1
• 页码：161-165
• 全文大小：176 K

文摘

A novel unstable external cavity for a broad area laser diode is presented. The cavity is based on a V-shaped setup that improves the slow axis beam quality by coupling the internal modes of a gain guided laser diode. The novelty here is the compact unstable resonator design without lenses in direction of the slow axis. For frequency stabilisation and to narrow the line width of the laser diode emission a diffraction grating in a Littrow configuration is used. With this setup up to 1 W of near diffraction limited light with a beam quality of M² 1.3 and a line width of 1.7 MHz could be achieved. The external cavity laser was tunable over a range of 35 nm (FWHM) around the center wavelength of 976 nm.