The Alexandrite Crystal, scientifically known as Chromium-doped beryllium aluminum oxide, is a premier laser gain material utilized in solid-state lasers. Grown using the Czochralski method, this crystal is renowned for its exceptional quality and monocrystalline form. With emission wavelengths typically ranging from 710 nm to 800 nm, Alexandrite is capable of producing broadly wavelength-tunable lasers. Most commonly, it operates at a wavelength of 755 nm, where the laser gain reaches its peak. This crystal is characterized by its anisotropic nature, meaning that its absorption and gain properties are significantly influenced by the polarization direction of the pump light. The material's strong birefringence facilitates the achievement of linearly polarized emission with minimal depolarization losses. Furthermore, Alexandrite's thermal shock resistance is five times greater than that of Nd:YAG, attributed to its exceptional mechanical and thermo-mechanical strength, as well as its thermo-optical properties. This robustness allows it to not only withstand elevated temperatures but potentially perform better under such conditions. As a result, pulsed Alexandrite lasers often exhibit enhanced performance at higher temperatures, accommodating very high pump powers. In dermatological applications, Alexandrite lasers play a crucial role. They are extensively used for hair removal, tattoo removal, and treating visible leg veins and pigmented lesions. The laser's light is preferentially absorbed by hair shafts, and the resultant heat damages the hair shafts and surrounding follicles, a process known as selective photothermolysis. By cooling the skin during treatment, damage to the epidermis is minimized. The shorter emission wavelength of Alexandrite lasers, compared to Nd:YAG lasers, is advantageous for removing finer hairs, although it poses a higher risk of skin damage in darker skin due to melanin absorption. High-intensity pulses from these lasers are typically applied to large skin areas, allowing for efficient treatment with relatively simple laser systems.