TeO₂is an excellent acousto-optic media because of its high AO figure of merit, larger birefringence, optical rotation and slow propagation velocity along [110] direction. The solution of AO devices made of TeO₂crystal, like AO Rotators, Modulators, Q-Switch, Resonators, Tuning Filters …, features much powerful performance than other AO medias. 

 

Transparency Range: 350~5000nm

Crystal Structure: Tetragonal

Mohs hardness: 4.5

Melting Point: 730℃

Density: 5.99 gram/cm³

Refractive Index: n_o=2.260 n_e=2.142

Phase Velocity (m/s): 616

Photo-Elastic Coefficient: P₁₁=0.074 P₁₃=0.340 P₃₁=0.091 P₃₃=0.240

AO Figure of merit: 1200 x 10^–18S³/g <110>

 

Features and Standard specifications from LNG Optics:

Orientation accuracy: ± 12 arc minutes

Dimension tolerance: ± 0.2mm

Surface Quality: 10/5 S/D

Flatness: λ/8 @ 632.8nm

Parallelism: 30 arc seconds

Wedged angles accuracy: 3 arc minutes

Perpendicularity: 5 arc minutes

AR Coatings: single band, broadband