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laser crystal
optical crystal
Er:YAG
The Erbium-doped Yttrium Aluminum Garnet crystal (Er:YAG) is an excellent crystal capable of exciting laser in the 2940 nm band. The 2940 nm band is at the absorption peak of hydroxyl groups..
Product description
The Erbium-doped Yttrium Aluminum Garnet crystal (Er:YAG) is an excellent crystal capable of exciting laser in the 2940 nm band. The 2940 nm band is at the absorption peak of hydroxyl groups and can be strongly absorbed by biological tissues. Therefore, it is widely used in fields such as laser medical systems, such as dentistry (hard tissues), plastic surgery, etc.
Product Introduction
- High slope efficiency
- Can operate at room temperature
- Operates within the relatively safe band range for the human eye
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Energy Level Transition
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4I3/2→4I11/2
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Laser Wavelength
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2940 nm
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Photon Energy
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6.75×10-20 J @ 2.940 μm
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Emission Cross-Section
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3×10-20 cm2
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Refractive Index
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1.79 @ 2.940 μm
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Pump Band
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600~800 nm
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Doping Concentration
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Er: ~50 at.%
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Rod Size
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Diameter: 3~6 mm, Length: 50~120 mm;
Dependent on customer requirements
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Size Tolerance
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Diameter Tolerance: ±0.1 mm
Length Tolerance: ±0.5 mm
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Surface Finish
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10/5, Refer to MIL-PRF-13830B Standard
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Wavefront Distortion
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λ/8 @ 633 nm
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Flatness
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λ/8 @ 633 nm
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Parallelism
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≤30"
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Perpendicularity
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≤15′
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Chamfer
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≤0.2 mm×45°
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Extinction Ratio
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≥25 dB
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Reflectivity of Anti-reflection Coating
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≤0.2% @ 2940 nm
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