1319 nm and 1338 nm dual-wavelength operation of LD end-pumped Nd:YAG ceramic laser

Abstract

In this paper, we demonstrate the efficient 1.3 um dual-wavelength operation of LD end-pumped Nd:YAG ceramic laser. With a plano-concave cavity, a maximum continuous-wave dual-wavelength output power of 5.92 W is obtained under an incident pump power of 20.5 W, giving a slope efficiency of 30.3% and an optical-optical conversion efficiency of 29.0%. With Co(2+):LaMgAl(11)O(19) crystal as the saturable absorber, the passively Q-switched dual-wavelength operation is achieved for the first time to our knowledge. The maximum passively Q-switched average output power is 226 mW, the minimum pulse width is 15 ns, and the highest pulse repetition rate is 133 kHz.

Single- and multi-wavelength laser operation of a diode-pumped ND:GGG single crystal around 1.33µm

“…As such laser emission wavelength is a typical laser emission transition ( 4 F 3/2 -4 I 13/2 ) of a number of Nd 3 þ doped crystals, many laser sources based on these crystals, such as Nd: YAG [1][2][3][4], Nd:YAP [5,6], Nd:YVO 4 [7][8][9][10], Nd:GdVO 4 [11][12][13][14][15][16][17], Nd: YLF [18] and even Nd:GGG [19,20] which is the crystal considered here in this communication, have been investigated and successfully operated. Laser operation of these solid state laser sources at several laser wavelengths simultaneously is also very interesting to address other important applications such as atmospheric sensing via differential Lidar (DIAL) or the production of stable and coherent THz waves via difference frequency generation [21][22][23].…”

“…In fact, very few works have been dedicated in the past to that particular aspect in the 1.3 mm spectral domain [3,18]. There are several reasons for that.…”

“…However, except with Nd:YAG [3] and Nd:YLF [18], no results were reported so far concerning dual-or multi-wavelength laser operation of any other diode-end-pumped laser crystals around 1.3 mm. In the case of Nd:GGG, no laser operation other than at the 1331 nm laser wavelength corresponding to the highest cross section emission line at 1.3 mm was ever reported previously to our knowledge.…”

Second-Stokes dual-wavelength operation at 1321 and 1325 nm ceramic Nd:YAG/BaWO_4 Raman laser

“…Solid state lasers emitting dual-wavelengths with a small wavelength separation have attracted much attention due to their promising applications in terahertz (THz) radiation by difference frequency generation [1,2]. Traditionally, the methods to realize this type dual-wavelength laser are by designing a typical coating for the output coupler (OC) to appropriately choose the transmission values of the two wavelengths [2], or using an intracavity etalon as a wavelength tuning element [1].…”

“…Traditionally, the methods to realize this type dual-wavelength laser are by designing a typical coating for the output coupler (OC) to appropriately choose the transmission values of the two wavelengths [2], or using an intracavity etalon as a wavelength tuning element [1]. The work cited above focused on the fundamental laser frequency in neodymium host crystals.…”