Diode-Pumped CW Laser Operation of a c-cut Nd:YAlO ₃ Crystal on Low-Gain Emission Lines Around 1.1 <inline-formula> <tex-math notation="LaTeX">$\mu\textrm{m}$</tex-math></inline-formula>

Abstract

We report on the diode-pumped continuous-wave laser operation of a c-cut Nd:YAlO 3 (YAP) laser crystal at various low gain emission wavelengths around 1.1 m by using a simple and compact linear cavity and a glass etalon. Inserting and tilting the etalon in a particular position, single-wavelength operation at 1099 nm is achieved first, at low pump power, with a maximum output power value of 0.15 W. Then, increasing the pump power leads to dual-wavelength operation at 1079 and 1099 nm with a maximum output power value of 2.28 W and a laser slope efficiency value of about 20%. Further tilting the etalon, dual-and single-wavelength laser operations could be achieved, for the first time to our knowledge, at 1090 and 1106 nm. Single-wavelength laser operations at 1106 and 1090 nm are obtained with maximum output power values of 0.25 and 1.44 W, respectively, and simultaneous dual-wavelength lasing could be obtained with a maximum output power value of 1.89 W and a laser slope efficiency value of nearly 18%.

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

“…During the early days of lasers, the research of Nd:YAP mainly focused on the generation of single wavelength lasers [19][20][21][22][23]. Recently, dual-wavelength Nd:YAP lasers have attracted the attention of researchers [10,13,[24][25][26][27]. Usually an angle-tuned etalon is used to generate dual-wavelength lasers at wavelengths such as 1073 and 1080 nm [25], 1341 and 1339 nm [13] and 1079 and 1099 nm [27].…”

“…Recently, dual-wavelength Nd:YAP lasers have attracted the attention of researchers [10,13,[24][25][26][27]. Usually an angle-tuned etalon is used to generate dual-wavelength lasers at wavelengths such as 1073 and 1080 nm [25], 1341 and 1339 nm [13] and 1079 and 1099 nm [27]. As Nd:YAP is a biaxial material with different emission spectra along different directions of crystallographic axes [23,28,29], it's advantageous to generate an orthogonally polarized dual-wavelength output.…”