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Terbium Gallium Garnet (TGG) crystals are the premier magneto-optical material for Faraday rotators and isolators, essential for controlling light polarization in high-power lasers (400–1100 nm, excluding 470–500 nm). They offer a high Verdet constant, low optical loss, and high thermal conductivity.
This video explains how Faraday cages work to protect sensitive equipment:
Key Characteristics of TGG Crystals
- Optimal Performance: They provide superior Faraday rotation at 1064 nm (ideal for YAG lasers).
- High Power Handling: TGG displays high laser damage thresholds (>1GW/cm²) and excellent thermal conductivity (7.4 W/m·K), making them suitable for high-power laser systems.
- High Verdet Constant: Approx. 35 rad T⁻¹m⁻¹ at 1064 nm.
- Material Properties: The chemical formula is , possessing a cubic structure, a Mohs hardness of 8, and a melting point of 1725°C.
Common Applications
TGG is used to prevent laser damage from back-reflected light in:
TGG is used to prevent laser damage from back-reflected light in:
Specifications and Technical Details
- Optical Quality: Typically >30 dB extinction ratio and <λ/10 at 633 nm flatness.
- Orientation: Generally grown in the [111] direction.
- Refractive Index: 1.954 at 1064 nm.
While TGG is superior for many applications, materials such as Potassium Terbium Fluoride (KTF) may be preferred for extremely high-power applications due to lower absorption.
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Web results
TGG Faraday Crystals Manufacturers and Suppliers
meta-laser.com
https://www.meta-laser.com › Products › Faraday Crystals
meta-laser.com
https://www.meta-laser.com › Products › Faraday Crystals
TGG Faraday crystal is used in the range of 400-1100 nm wavelength (excluding 470-500 nm).TGG has a high Verdet constant and is resistant to laser damage.Read more
TGG Crystal
AG Optics
https://www.agoptics.com › TGG-Crystal
AG Optics
https://www.agoptics.com › TGG-Crystal
TGG is an excellent magneto-optical crystal used in various Faraday devices(Polarizer and Isolator) in the range of 400nm-1100nm, excluding 475-500nm.Read more
Faraday Crystals
Northrop Grumman
https://www.northropgrumman.com › space › products
Northrop Grumman
https://www.northropgrumman.com › space › products
Composition, TGG Tb3Ga5O · KTF KTb3F ; Crystal structure, cubic, cubic ; Transparency range (rad/Tm), 400 - 1500nm, 400 - 1500nm ; Verdet constant, 1064nm (rad/T•m) ...Read more
Terbium gallium garnet
Wikipedia
https://en.wikipedia.org › wiki › Terbium_gallium_garnet
Wikipedia
https://en.wikipedia.org › wiki › Terbium_gallium_garnet
This is a Faraday rotator material with excellent transparency properties and is very resistant to laser damage. TGG can be used in optical isolators for laser ...Read more
Faraday Crystals TGG - Semiconductor Electronics
semi-el.com
https://semi-el.com › products › crystals-and-optics › tgg
semi-el.com
https://semi-el.com › products › crystals-and-optics › tgg
TGG Faraday crystals are commonly used in high-power laser systems, such as solid-state and fiber lasers, to control the polarization of light. TGG has a high ...Read more
TGG( Terbium Gallium Garnet) for Faraday Rotator & Isolator
Bluebean Optical
http://www.bbotech.com › product
Bluebean Optical
http://www.bbotech.com › product
TGG (Terbium Gallium Garnet) is an excellent magneto-optical crystal used in various Faraday devices (Rotator and Isolator) in the range of 400-1100nm.Read more
TGG crystal Terbium Gallium Garnet
HG Optronics.,INC.
https://www.hgoptronics.com › tgg-crystal-terbium-gall...
HG Optronics.,INC.
https://www.hgoptronics.com › tgg-crystal-terbium-gall...
TGG is an excellent magneto-optical crystal used in various Faraday devices(Polarizer and Isolator) in the range of 400nm-1100nm, excluding 475-500nm. Product ...Read more
Fabrication and characterization of TGG crystals containing ...
ScienceDirect.com
https://www.sciencedirect.com › article › abs › pii
ScienceDirect.com
https://www.sciencedirect.com › article › abs › pii
by Z Chen2016Cited by 46 — The current investigation centers on producing larger Faraday effect based on TGG single crystal owing to its congruently nature. Some researchers have found ...Read more
TGG Terbium Gallium Garnet Crystal for Faraday Rotators
YouTube · delmarphotonics
70+ views · 2 years ago
YouTube · delmarphotonics
70+ views · 2 years ago
Request a quote for TGG crystals, Faraday rotators and Faraday Isolators at sales@dmphotonics.com A Faraday rotator is an optical device ...
What are Faraday Rotators and Isolators?
Coherent
https://www.coherent.com › Newsroom › Glossary
Coherent
https://www.coherent.com › Newsroom › Glossary
TGG has long been the Faraday rotator crystal of choice for the 650 – 1100 nm spectral range for several reasons. For example, it can be grown with high purity.Read more