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LTF Lithium Terbium Fluoride

LTF lithium terbium fluoride (LiTbF 4 ) crystal has a tetragonal scheelite structure, the c-axis is the optical axis, and has the characteristics of large Verdet constant, low bulk absorption coefficient, negative thermo-optic coefficient and small nonlinear coefficient.

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Product Description

It is a magneto-optic crystal material with excellent performance. When LTF crystals are used in high-power Faraday rotators and magneto-optical isolators, they can overcome the problems of traditional TGG crystals, such as the decrease in isolation caused by the "temperature rise" caused by the large volume absorption coefficient, and the deterioration of the quality of the front-end beam. After years of technical research, the company has realized the stable production of LTF crystals with a diameter of 2 inches, and can provide users with customized LTF crystal products of various sizes and specifications.

Main Features

Small body absorption coefficient (≤150ppm/cm)

large crystal size

Good optical uniformity

Small thermo-optic coefficient and nonlinear refractive index coefficient

High resistance to photodamage threshold

Product Parameters

Crystal diameter	2mm～15mm
Crystal length	10mm～40mm
crystal axis	c-axis
Orientation accuracy	≤5′
Extinction Ratio	≥30dB
use band	400～1500nm (except Tb ion intrinsic absorption peak around 487nm)
Body Absorption Coefficient	≤150 ppm/cm
through wavefront distortion	≤0.125λ/25mm @633nm
Verdet constant	38 rad/T•m @1064nm
Side droop	≤5′
Flatness of end face	≤λ/10 @633nm
Parallelism of end faces	≤10″
AR Coating Residual Reflectance	AR,R ≤0.2%