Dual wavelength continuous wave laser using a birefringent filterC. G. Treviño-Palacios, O. J. Zapata-Nava, E. V. Mejía-Uriarte, N. Qureshi, G. Paz-Martínez and O. KolokolstevJ. Eur. Opt. Soc.-Rapid Publ., 8 (2013) 13021DOI: https://doi.org/10.2971/jeos.2013.13021