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Er:YAG - Erbium Doped Yttrium Aluminum Garnet

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Er:YAG  - Erbium Doped Yttrium Aluminum Garnet
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  • Er:YAG - Erbium Doped Yttrium Aluminum Garnet

  • Er:YAG is an excellent laser crystal which lasers at 2940 nm. This band is at the hydroxyl absorption peak which can be strongly absorbed by biological tissues. So it widely applies to medical area.
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Introduction

Erbium Doped Yttrium Aluminum Garnet  (Er:YAG) is an excellent laser crystal which lases at 2940 nm. This band is at the hydroxyl absorption peak which can be strongly absorbed by biological tissues. So it widely applies to medical area, such as dental (hard tissues), orthopedics, etc.

CASTECH's laser crystal Er:YAG is featured by

      •   High slope efficiency      •   Operate well at room temperature   
      •   Operate in a relatively eye-safe wavelength range

 

Table 1. Optical and Spectral Properties

Laser Transition

4I3/24I11/2

Laser Wavelength

2940 nm

Photon Energy

6.75 × 10-20 J @2.940 µm

Emission Cross Section 

3 × 10-20 cm2

Refractive Index

1.79 @2.940 µm

Pump Bands

600~800 nm

 

Table 2. Specifications

Dopant Concentration

Er: ~50 atm%

Rod Sizes

Diameter: 3~6 mm, Length: 50~120 mm;

Upon request of customer

Dimensional Tolerances

Diameter: ±0.1 mm 

Length: ±0.5 mm

Surface Quality (Scratch/Dig)

10/5 to MIL-PRF-13830B

Wavefront Distortion

λ/8 @633 nm

Flatness

 λ/8 @633 nm

Parallelism

≦ 30 arc sec

Perpendicularity

≦ 15 arc min

Chamfer

≦ 0.2 mm×45°

Extinction Ratio

≧ 25 dB

AR Coating Reflectivity

≦ 0.2% @2940 nm

 

 

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