Abstract

Room Temperature upconversion lasing has been observed from Tm³⁺, Ho³⁺, Er³⁺, and Pr³⁺ ions in ZBLAN fibers at wavelengths as short as 455 nm [1–7]. Lasing at 380 nm has been observed in Nd³⁺:LaF₃ for temperatures up to 90 K, and lasing at 413 nm has been observed in Nd³⁺:YLiF₄ for temperatures up to 40 K [8,9]. Recently, room temperature lasing at 381 nm (⁴D_3/2 - ⁴I_9/2) and at 412 nm (²P_3/2 – ⁴I_9/2) has been observed in Nd³⁺:ZBLAN fiber and is described here.

© 1995 Optical Society of America