Terbium Gallium Garnet (TGG）
WALLSON INDUSTRIAL CO., LTD supplies high-quality TGG (Terbium Gallium Garnet) crystals, TSAG (Terbium Scandium Aluminum Garnet) crystals, LBO (Lithium Triborate) crystals, and BBO (Beta Barium Borate) crystals. The company has become one of the leading suppliers of LBO and BBO crystals.
Terbium Gallium Garnet (TGG): The Optimal Magneto-Optical Material for Faraday Rotators
Terbium Gallium Garnet (TGG) is a high-performance magneto-optical crystal with the chemical formula Tb₃Ga₅O₁₂, suitable for applications in the visible and infrared spectral ranges.
TGG exhibits a high Verdet constant, a broad operational wavelength range, a low absorption coefficient, high thermal conductivity, and a high laser damage threshold. It serves as a substrate material for magneto-optical, microwave, and bubble memory garnet thin films. Additionally, it is widely used in manufacturing Faraday rotators, magneto-optical modulators, industrial lasers, optical isolators, and laser gyroscope reflectors, playing a crucial role in optical communication and industrial laser applications.
TGG is recognized as the best magneto-optical material for Faraday rotators and optical isolators. Due to the high complexity of Faraday rotator research and production, the increasing localization of these components is driving the growing demand for TGG in the market.
TGG can be grown using the Czochralski method, Edge-defined Film-fed Growth (EFG) method, and the Triple-crucible Czochralski method. However, traditional TGG production faces challenges such as gallium oxide volatility, difficulties in controlling the growth process, and crystal defect formation.
According to the 2025–2030 in-depth market research and development forecast for the TGG industry, technological advancements will continue to drive production capacity expansion, leading to a promising future for TGG.
WALLSON INDUSTRIAL CO., LTD supplies high-quality TGG (Terbium Gallium Garnet) crystals, TSAG (Terbium Scandium Aluminum Garnet) crystals, LBO (Lithium Triborate) crystals, and BBO (Beta Barium Borate) crystals. The company has become one of the leading suppliers of LBO and BBO crystals.
Industry analysts emphasize that TGG remains the optimal magneto-optical material for Faraday rotators and optical isolators, and it has already achieved large-scale commercialization. As optical communication and industrial laser technologies advance, the TGG market is expected to expand further. In recent years, more companies have entered the TGG sector, continuously improving production processes. As a result, the supply capability of large-size, smooth-surfaced, and optically transparent TGG crystals is steadily increasing.
