Faraday Glasses with a Large Size and High Performance

A kind of Faraday glass with a size of Φ40 mm × 14 mm and Φ100–300 mm × 25 mm, respectively, was prepared by the melting and casting process, which had neither a Pt particulate nor a bubble or striation. The measurement results showed that the surface homogeneity of the samples was up to ± 1 × 10 ⁻⁶ , the laser threshold reached 10 J/cm ² (1ω, 3 ns), and the Verdet constants of the glasses were −0.273 min/Oe/cm at 632.8 nm and −0.076 min/Oe/cm at 1064 nm, respectively.