Crystals Land

* Welcome To TGG Crystal *
_________________________________________

 

 

Terbium Gallium Garnet(TGG)

The magneto-optical crystal TGG is an optimum material for Faraday devices (Rotator and Isolator) in the range from 400nm-1100nm, excluding 470-500nm.The Faraday rotator consists of a TGG rod contained inside a special designed magnet. The rotation sense of the polarization of a light beam passing through the rotator only depends on the direction of the magnetic field and not on the direction of propagation of the light beam. The optical isolator is a Faraday rotator set between two suitably aligned polarizers which allows a light beam to pass through in one direction only. TGG has a combination of excellent properties such as large Verdet constant, low light loss, high thermal conductance and high light damage threshold which makes it a unique material for Faraday devices particularly suitable for YAG lasers and Ti: sapphire tunable lasers, ring lasers and seed injected lasers.

Crystal Parameters:

Chemical Formula

Tb3Ga5O12

Lattice Parameter

a=12.355

Growth Method

Czocralski

Density

7.13g/cm3

Mohs Hardness

8.0

Melting Point

1725oC

Refractive Index

1.954 at 1064nm

Thermal Conductivity

9.4x10-6oC-1

Verdet Constant

0.12min/Oe.cm at 1064nm

Standard TGG rod specification:

Crystal rod parameters:

Orientation

[111] within 5 degrees

Wave front Distortion(Measured at 633nm)

< 1/8 wave total

Extinction Ratio

> 30dB

Dimensional Tolerances:

Diameter

+0.00mm/-0.05mm

Length

+0.2mm/-0.2mm

Chamfer

0.13mm (+0.00mm,-0.08mm)   at 45 +/- 5

End Configuration:

Flatness

< 1/10 wave at 633nm

Parallelism

< 1 minutes of arc

Perpendicularity

< 1 degree

Scratch-dig

10-5 per MIL-O13830A

_________________________________________

[SALE]
[aboutus] [PRODUCTS] [Services][CONTACT]
http://www.crystalsland.com
Copy right © 1996 GB group, Inc. All right reserved. E-Mail: webmaster@goldbridge.com