5/21/2023 0 Comments Que es la energia fotonica![]() In this work, a 3-mm diameter, 30-mm length Nd:YAG rod was pumped through a Fresnel lens concentration system with 0.785 m 2 collection area. 2 In 2013, 2.3-W TEM 00-mode CW solar laser power was produced, corresponding to a TEM 00-mode collection efficiency of 2.93 W / m 2. In this work, a Fresnel lens solar concentration system with a large area of 4 m 2 was used to pump a 100-mm long neodymium-doped yttrium aluminum garnet (Nd:YAG) rod with a diameter of 6 mm. In 2012, 120-W continuous-wave (CW) multimode solar laser power and a laser collection efficiency of 30 W / m 2 were achieved. In the last decade, significant improvements in solar-pumped laser performances have been achieved for both multimode and fundamental-mode operations. Therefore, it can be used to produce a cost-effective laser system with the possibility of obtaining extremely high power and brightness, as compared to the conventional pumping sources such as flash lamps, laser diodes, and LEDs. 1 The main reason for this attention may be explained by the abundance of free solar energy. The production of a laser light using solar energy as a pumping source has received significant attention in laser research since its first successful operation by Young in 1966. It provides also a 1.14 and 1.19 times improvement, as compared to the previous numerical record of the TEM 00-mode solar laser pumped by the Fresnel lens primary solar concentrator. This result represents an improvement of nearly 2 and 1.24 times, in solar laser collection efficiency and solar-to-TEM 00-mode laser conversion efficiency, respectively, as compared with the previous experimental records of the TEM 00-mode solar laser pumped through the parabolic mirror primary concentrator. 155.29-W TEM 00-mode total laser power was numerically calculated, corresponding to 15.5 W / m 2 solar laser collection efficiency and 1.72% solar-to-TEM 00-mode laser conversion efficiency, respectively. The laser design parameters were optimized using ZEMAX © and LASer Cavity Analysis and Design (LASCAD ©) analysis software to maximize the TEM 00-mode laser power. Four off-axis parabolic mirrors with 10 m 2 total collection area were used as the primary solar concentrators to pump four 3.1-mm diameter, 84-mm length neodymium-doped yttrium aluminum garnet (Nd:YAG) rods within four 2V-shaped pump cavities through four secondary fused-silica aspheric concentrators and four rectangular fused-silica light guides, ensuring a good absorbed pump power distribution within each rod and avoiding the serious thermal lensing and thermal stress issues associated with classical single large rod solar lasers. ![]() A four-rod/four-TEM 00-mode beam off-axis parabolic mirror solar pumping concept is proposed.
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