Introduction

Ytterbium-doped Calcium fluoride (Yb: CaF₂), grown by Czochralski technique, is with long fluorescence lifetime and broad absorption bands, which make it an ideal material for laser diode pumping. Yb:CaF₂ exhibits broad emission bandwidth as well as limited non-linear effects under intense irradiation, supporting generation of ultra-short pulses and high-power operation.

CASTECH's laser crystal Yb: CaF₂ is featured by

•  Low quantum defect ,Long fluorescence lifetime

•  Wide optical transmission range, from 0.12μm to 10μm

•  Low dispersion behavior

•  Limited nonlinear effects under intense laser irradiation

•  Customized coatings are available

Table 1. Basic Properties

Figure 1. Absorption Coefficient and Transimission Spectra of a 3.0 at.%Yb³⁺ Doped CaF₂ Crystal