Efficient laser-diode end-pumped Nd:GGG lasers at 1054 and 1067  nm

Abstract

Efficient and compact laser-diode end-pumped Nd:GGG simultaneous multiwavelength continuous-wave lasers at ∼1059, ∼1060 and ∼1062 nm were first demonstrated in a free-running 30 mm plano-concave laser cavity. The maximum output power was up to 3.92 W with a slope efficiency of about 53.6% with respect to the absorbed pump power. By inserting a 0.1 mm optical glass plate acting as a Fabry-Pérot etalon, a single-wavelength laser at ∼1067 nm with a maximum output power of 1.95 W and a slope efficiency of 28.5% can be obtained. Multiwavelength lasers, including those at ∼1054 or ∼1067 nm, were also achievable by suitably tilting the glass etalon. These simultaneous multiwavelength lasers provide a potential source for terahertz wave generation.

Passively Q-switched Nd:GGG laser at 1110.2 nm by Cr:YAG

“…The Nd 3+ -doped gain medium is an admirable and efficient laser material for the all-solid-state laser, which has valuable applications in substantial fields [1][2][3][4]. Compared with conventional Nd 3+ -doped medium, such as YVO 4 , YAG, LuAG, YLF, GSGG, GYSGG, etc, Nd:GGG crystals have attracted much attention due to their excellent mechanical and optical properties, a more favorable thermal capacity and a higher doping level [5][6][7][8].…”

“…Compared with conventional Nd 3+ -doped medium, such as YVO 4 , YAG, LuAG, YLF, GSGG, GYSGG, etc, Nd:GGG crystals have attracted much attention due to their excellent mechanical and optical properties, a more favorable thermal capacity and a higher doping level [5][6][7][8]. Recently, continuous-wave (CW), passively or actively Q-switched, and high-power Nd:GGG lasers, which emit single-wavelength or multi-wavelength lines at 937, 1062, and 1331 nm, have been reported [2,3]. Besides these lines, other wavelengths can be also generated, i.e.…”

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>

“…Moreover, the emission cross section of Nd:YAG around 1.06 m is quite high, which makes it favorable for laser generation with relatively low threshold and high-power output. Nd:YAG [1]- [3] as well as other Nd-doped oxides like Nd:GGG [4], [5], Nd:YVO 4 [6], [7] and Nd:GdVO 4 [8] were also proved to lead to interesting laser performance at different longer laser wavelengths with lower gain cross sections between 1.07 and 1.1 m. It deserves to be pointed out that these lasers around 1.07 and 1.1 m have important applications in detecting carbon monoxide poisoning by being frequency doubled to about 538 and 555 nm since carbonylhemoglobin and hemoglobin have broad absorption at these two visible laser radiations [2], [9]. In fact, such laser sources have already garnered much attention during the past decade.…”

Diode-pumped simultaneous multi-wavelength linearly polarized Nd:YVO4laser at 1062, 1064 and 1066 nm

“…Diode-pumped Nd 3+ -doped laser crystals for ~1.06 μm laser operation are the most attractive candidates because of their true four-level laser operation mode ( 4 F 3/2 → 4 I 11/2 ) and their usually higher gain cross sections. In fact, based on these advantages, in the past decades, Nd 3+ -doped laser crystals have been widely employed in multi-wavelength laser systems, such as Nd:YAG [4][5][6], Nd:GGG [7][8][9], Nd:GdVO 4 [10,11], Nd:YAP [12,13] and Nd:YLF [2,14]. Similar to Nd:YAG, Nd:YVO 4 is one of the few laser crystals that exhibit the high thermal conductivity and hardness combined with low threshold that are necessary for high-average-power operation.…”