| Model: | MR3-2 & MR4 |
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| Brand: | - |
| Origin: | Made In China |
| Category: | Electronics & Electricity / Magnetic Materials |
| Label: | Faraday , Rotator , Isolator |
| Price: |
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| Min. Order: | - |
| Last Online:23 Apr, 2020 |
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
| Specifications: | In general,most of Magneto Optic Glass Elements produced by MR3-2 glass in view of cost,the sizes are available on request. Magneto Optic Glass 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 * Bubbles,inclusions,cord,striae:Optical grade * Bulk laser damage threshold > 25 J/s.q.cm(20nsec pulse at 1064 nm) * Strain birefringence (special-annealing) extinction ratio to perpendicular polarization ≥ 45 dB or better * Strain birefringence at 632.8 nm < 2 nm/cm Extinction ratio > 40dB 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 and disks * Dimensional tolerance:+/- 0.05 mm for diameter * Thickness tolerance:+/-0.10 mm for length * Transitted wavefront ≤ 1/8 Lambda at 633 nm * Polishing and faces flat ≤ 1/10 wave at 633nm * Clear aperture exceeds central 95% of dimension * Surface quality:20/10um scratch/dig or better(MIL-0-13830A,USA) * Parallelism:End faces of the rotator rods are ground and polished < 60 seconds of arc. ( up to 5 arc seconds on request) * Perpendicularity < 0.5 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) |
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| 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. |
