A Solid-State Near-IR Laser for Spin-Exchange Optical Pumping

Synthesis of copper nanoparticles by laser ablation

“…Copper is a plastic material of golden color with good electrical conductivity and high reflectivity in the near infrared range of the spectrum at a wavelength of 1064 nm. Therefore, in this work, we used a laser [6,7] radiating in a shorter wavelength region of the spectrum, which contributed to an increase in the absorption capacity. A specially designed laser consisted of a synthetic alexandrite crystal (100 mm long, 6.3 mm in diameter).…”

Birefringent tuner for narrowband alexandrite laser

“…Tunable solid-state lasers are widely used in the field of remote sensing of the atmosphere, laser spectroscopy, and hyperpolarization of nuclear spins. [1,2]. Active media with a wide gain band, such as LISAF, Ti:Sapphire, and Alexandrite, are used to create high-power tunable lasers in the visible and near-IR ranges.…”

“…This is achieved by installing a plate with a phase shift of π / 2 relative to other plates, the transfer function of such a plate has a minimum exactly at the wavelength at which the other filter plates show a maximum. [3] Figure 2 shows the transmission of a four-component Lyot tuner with a thickness ratio of 1: 2: 4: 8 and a total thickness of 6 mm.The resulting Lyot tuner transmission is determined as the product of the transmission of all elements (2). 3 shows the transmission of the same filter, but the optical axis of the thickest plate is rotated by π / 2.…”