A 1064- and 1074-nm Dual-Wavelength Nd:YAG Laser Using a Fabry–Perot Band-pass Filter as Output Mirror

Abstract

We propose and demonstrate a 1064-and 1074-nm dual-wavelength Nd:YAG laser 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 an h111i-cut Nd:YAG crystal with a plano-plano resonator cavity. The dielectric FPF as output mirror is specially designed 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 efficiency is 18.8% with the threshold pump power of 2.1 W. The design of the FPF used as output mirror, including the relationship between FWHM and spectral separation, peak wavelength location, and peak transmission, are discussed. Compared with the coupled-cavity, etalon, or specially coated mirror methods, the FPF method presented in this paper is both easy in the selection of oscillating wavelength and simple in design and fabrication.

Solar-pumped 1061-/1064-nm dual-wavelength Nd:YAG monolithic laser

“…9 Lin et al reported an LD-pumped Nd:YAG continuous-wave dual-wavelength laser operation at 1064 and 1078 nm using a simple and compact two-mirror laser cavity and an undoped YAG thin plate as an F-P etalon. 10 Wang et al 11 proposed a 1064-/1074-nm dual-wavelength Nd:YAG laser by exploiting a specially designed Fabry-Perot bandpass filter as the output mirror to balance the net gain at 1064 and 1074 nm to obtain a dual-wavelength output. Hou et al 12 demonstrated an LD pumped dualwavelength Nd:YAG lasers at 1064, 1319, and 1338 nm for continuous-wave and Q-switched operation by forming a three-mirror collinear cavity.…”

Efficient multiwavelength operation of a diode-pumped Nd:YAlO3 laser at 1064, 1072 and 1079 nm

“…The dual-wavelength generation was demonstrated in lasers based on different neodymium-doped active media, including isotropic crystals Nd:YAG [9][10][11][12][13], Nd:LuAG [14], Nd:GGG [15], Nd:GYSGG [16], Nd:CNGG [17], Nd:LaF 3 [18] and anisotropic crystals Nd:YVO 4 [19][20][21][22][23][24][25][26][27][28][29], Nd:GdVO 4 [30][31][32][33][34], Nd:LuVO 4 [35,36], Nd:YLiF 4 [37][38][39][40][41], Nd:LuLiF 4 [42], Nd:YAlO 3 [43][44][45][46][47][48], Nd:LYSO [49], Nd:LaBO 2 MoO 4 [50], Nd:LSB [51]. Dual-wavelength lasers with isotropic active media usually utilize specially designed dichroic output couplers and/or spectrally selective Fabry-Perot etalons.…”

Orthogonally polarized dual-wavelength laser based totally on intrinsic birefringence of the gain crystal

“…The cavity is simple and compact. FPF has also been used as an output coupler to obtain dual-wavelength lasers, such as a 1064 and 1085 nm Nd:YVO 4 laser with a coupled cavity [32] and a 1064 and 1074 nm Nd:YAG laser by a simple linear cavity [33]. Recently, a peak wavelength linearly variable FPF has been used to generate a power-ratio tunable dual-wavelength laser [34].…”