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Ho:Cr:Tm:YAG - Holmium, Chromium, Thulium Co-doped Yttrium Aluminum Garnet

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Ho:Cr:Tm:YAG - Holmium, Chromium, Thulium Co-doped Yttrium Aluminum Garnet
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  • Ho:Cr:Tm:YAG - Holmium, Chromium, Thulium Co-doped Yttrium Aluminum Garnet

  • Ho:Cr:Tm:YAG is a high efficient laser material which lases at 2.1 µm. It has wide applications in surgery, dentistry, atmospheric testing, etc.
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Introduction

Holmium, Chromium, Thulium Co-doped Yttrium Aluminum Garnet (Ho:Cr:Tm:YAG) is a high efficient laser material which lases at 2.1 µm. It has wide applications in surgery, dentistry, atmospheric testing, etc.

 

CASTECH's laser crystal Ho:Cr:Tm:YAG  is featured by

      •   High slope efficiency
      •   Pumped by flash lamp or diode
      •   Operates well at room temperature
      •   Operates in a relatively eye-safe wavelength range

 

Table 1. Basic Properties

Laser Transition

5I7 → 5I8

Laser Wavelength

2.097 µm

Photon Energy

9.55 × 10-20 J

Emission Cross Section

7 × 10-21 cm2

Fluorescence Lifetime

8.5 ms

Refractive Index

1.80 @2.08 µm

Absorption Linewidth

4 nm

Diode Pump Band

781 nm

Major Pump Bands

400~800 nm

 

 Table 2. Specifications

Dopant Concentration

Ho:~0.35 at.%, Tm:~5.8 at.%, Cr:~1.5 at.%

Rod Sizes

Diameter: 3~6 mm, Length: 50~120 mm;

Upon request of customer

Dimensional Tolerances

Diameter: ± 0.1mm 

Length: ± 0.5 mm

Surface Quality (Scratch/Dig)

10/5 to MIL-PRF-13830B

Wavefront Distortion

λ/4 @633 nm

Flatness

 λ/8 @633 nm

Parallelism

≦ 30 arc sec

Perpendicularity

≦ 15 arc min

Chamfer

≦ 0.2 mm × 45°

AR Coating

≦ 0.2% @2094 nm

 

 

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