Specifications︰ In general,most of Magneto Optical Glass element produced by MR3-2 glass in view of cost,the sizes are available on request.
Magneto Optical Glass Material
Type MR3-2,Verdet constant-0.33min/Oe*cm at 632.8nm.
Type MR4 Verdet constant-0.38min/Oe*cm at 632.8nm
* Maximum inclusion size < 0.040 mm
* Maximum total inclusion cross
section < 0.04 mm2 per 100 cm*3
* Bulk laser damage threshold > 25 J/s.q.cm(20nsec pulse at 1064 nm)
* Strain birefringence (Special-annealing) Peak extinction ratio ≥ 40 dB or better
* Strain birefringence at 632.8 nm < 2 nm/cm
Magneto Optical Glass / Faraday Rotator Glass Element Feature
* Size from min. 0.90 mm to max.300 mm diameter,thickness max.50 mm.They are available to be made in a variety of forms including rods,slabs,disks and fibers
* Dimensional tolerance:+/- 0.05 mm for diameter
* Thickness tolerance:+/-0.20 mm for length
* Transitted wavefront ≤ 1/8 Lambda at 633 nm
* Polishing and faces flat ≤ 1/10 wave at 633nm
* Clear aperture exceeds central 90% of dimension
* Surface quality:20/10um scratch/dig or better(MIL-0-13830A)
* Parallelism:End faces of the rotator rods are ground and polished < 1 minutes of arc.
( up to 5 arc seconds on request)
* Perpendicularity < 1 degree
* Chamfer: 0.10-0.30 mm at 45 +/- 5 degree
* Fine grind for rod body
* Transparence (uncoated) T% ≥ 86%
* Anti-Reflection Coatings for two sides
Anti-Reflection Coating T% ≥ 98%
* Pulsed Damage Threshold:>20 J/cm*2 at 1064 nm (20ns)
Advantages︰ *Magneto Optical Glass,the diameter from 1.00 mm to 300mm, other size and special shape can be provided.
* Magneto Optical Glass is widely used in Faraday Rotator,Optical Isolator and many kinds of sensors,polarimeters and instruments with higher sensitivity and stability.
Product Description
Obviously the most important optical element in a Faraday Rotator and isolator are the Magneto Optical Glass / Faraday rotator Rod.
The characteristics that one looks for in a Faraday rotator optic, include a high Verdet constant,low absorption coefficient,low non-linear refractive index and high damage threshold. Also,to prevent self-focusing and other thermal related effects,the optic should be as short as possible.The two most commonly used materials for the 400-1600nm range are terbium doped borosillicate glass (MR3-2) and terbium gallium garnet crystal (TGG).But TGG crystal can't grow large size and too expensive
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