Abstract
Abstract: We propose and demonstrate a 1064- and 1074-nm dual-wavelength Nd:YAGlaser by exploiting a dielectric Fabry–Perot bandpass filter (FPF) as laser output mirror.A fiber-pigtailed 808-nm laser diode array is used to pump anh111i-cut Nd:YAG crystalwith a plano-plano resonator cavity. The dielectric FPF as output mirror is specially de-signed to balance the net gain of 1064 and 1074 nm to obtain a dual-wavelength laser.Simultaneous dual-wavelength lasing at 1064 and 1074 nm is successfully achieved.The maximum output power of the laser is 581 mW, and the slope conversion effi-ciency is 18.8% with the threshold pump power of 2.1 W. The design of the FPF usedas output mirror, including the relationship between FWHM and spectral separation,peak wavelength location, and peak transmission, are discussed. Compared with thecoupled-cavity, etalon, or specially coated mirror methods, the FPF method presentedin this paper is both easy in the selection of oscillating wavelength and simple in de-sign and fabrication.Index Terms: Diode-pumped lasers, solid state lasers, dual-wavelength.
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