LiNbO 3 :Ho 3+ Crystal as a Material for Radiation-Balanced Lasing in the 640–670 nm Region.

Holmium-doped congruent-composition lithium niobate (LiNbO₃:Ho, LN:Ho) crystals were grown by the Czochralski method. The absorption of the LN:1at% Ho³⁺ crystal was recorded at room temperature. On the basis of the analysis of emission and absorption spectra of the LN:1at% Ho³⁺ crystal, the possibilities of obtaining, at room temperature, radiation-balanced (RB) lasing in the region of 640–670 nm wavelengths corresponding to the inter-Stark transitions of manifolds ⁵F₅ and ⁵I₈ was theoretically investigated. The RB lasing parameters were calculated and the optimal pump and laser wavelengths were determined: λ O P = 652.1   n m , λ O L = 653.6   n m . The values for the RB lasing efficiency and radiation amplification in the considered wavelength region were obtained: F e f f = 3.23 × 10 − 22 c m 2 ,   F g a i n = 6.08 × 10 − 22   c m 2 . [ABSTRACT FROM AUTHOR]