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[China]
Address: No.200, Zgaoxian Road, Jiading Zone, Shanghai, China
Contact name:sales
Nanjing Crylink Photonics Co.,Ltd |
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Description
Gadolinium Gallium Garnet (GGG, Gd3Ga5O12) is a magneto-optical and
microwave substrate. It is the best substrate material for infrared
optical isolator (1.3 and 1.5um), which is a very important device
in optical communication.
Gallium Gadolinium Garnet (Gd3Ga5O12 or GGG) single crystal is
material with good optical, mechanical and thermal properties which
make it promising for use in fabrication of various optical
components as well as substrate material for magneto-optical films
and high–temperature superconductors.It is the best substrate
material for infrared optical isolator (1.3 and 1.5um), which is a
very important device in optical communication. It is made of YIG
or BIG film on the GGG substrate plus birefringence parts. Also GGG
is an important substrate for microwave isolator and other devices.
Its physical, mechanical and chemical properties are all good for
the above applications.
Feature
Application
Main Specification
| Materials | GGG |
| Orientation | [001] or [100] or [111] < ±0.5° |
| Parallel | 10〞 |
| Perpendicular | 5ˊ |
| surface Quality | 44109 |
| Wavefront Distortion | λ/4 @632nm |
| Surface Flatness | λ/8 @632nm |
| Clear Aperture | >95% |
| Chamfer | <0.1×45° |
| Thickness/Diameter Tolerance | ±0.05 mm |
| Maximum dimensions | dia 50×100mm |
| Coatings | AR/AR@940+1030；HR@1030+HT@940+AR1030； |
Physical and chemical characteristics
| Chemical formula | Gd3Ga5O12 |
| Crystal structure | cubic |
| Lattice parameters, Å | a = 12.383 Å |
| Molecular Weight | 1012.5 |
| Density, g/cm3 | 7.08 g/cm3 |
| Transmission Range | 0.40 ～ 7.0 µm |
| Refractive index | 1.97 @480nm, |
| Melting Point | 1730°C |
| Thermal conductivity at 25°C, W x cm-1 x °K-1 | 7.05 |
| Thermal expansion coefficient | 8.2×10-6 /K |
| Dielectric Constant | 30 |
| Dielectric loss tangent, at 10 GHz | 0.15 |
Standard product
| Orientation | End configuration, nm | Thickness, nm | Refractive index |
| [0 0 1] | 10×10 | 0.5 | 1.97 @ 480nm 1.96 @ 633nm 1.95 @ 1064nm |
| [1 1 0] | |||
| [1 1 1] | |||
| [0 0 1] | dia 18 | 3.3 | |
| [1 1 0] | |||
| [1 1 1] | |||
| [0 0 1] | dia 20 | 1 | |
| [1 1 0] | |||
| [1 1 1] | |||
| [0 0 1] | dia 25.4 | 0.5 | |
| [1 1 0] | |||
| [1 1 1] | |||
| [0 0 1] | 1 | ||
| [1 1 0] | |||
| [1 1 1] |
