CY2253 Thulium-Doped Yttrium Aluminum Garnet Crystal (Tm:YAG)

Catalog No. CY2253
Perpendicularity <5'
Chamfer 0.15±0.05mm
Refractive Incex@632nm 1.83
Laser Transition 3 F4 →3 H6

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Related Products: Titanium-doped Sapphire Crystal (Ti:Sapphire), Ho:Cr:Tm:YAG, Neodimium-doped Yttrium Aluminum Garnet (Nd:YAG).

Description of Thulium-Doped Yttrium Aluminum Garnet Crystal

Tm: YAG operating on the 3H4 -3H6 transition in the 0.82 µm wavelength range. It can be pumped with efficient diode lasers in the 0.78 - 0.8 mm wavelength range. The transition has a small quantum defect for low thermal dissipation. The upper state lifetimes can be long, on the order of a millisecond for good energy storage. It also has sufficient gain bandwidth to support sub-ps-long pulses depending on the host material and temperature of operation. Compared with the single-crystal material, the transparent ceramic materials combine the advantages of single crystals and glasses. The transparent ceramic materials are fabricated by solid-state reaction and vacuum sintering. So, they not only possess good optical and thermal properties as fine as single crystals but also can be fabricated with large size, high concentration. Furthermore, they also have other superiorities, such as a short fabrication period and less cost.

Advantages of Tm: YAG:

- High quantum efficiency
- High efficiency with LD pump
- Long upper state lifetime
- Sufficient gain bandwidth
- Small quantum defect
- High damage threshold

 

Specifications of Thulium-Doped Yttrium Aluminum Garnet Crystal

Material specifications

Tm concentration tolerance

Tm: 0.5~5 at%

Orientation

[111], <5°

Parallelism

≤10"

Surface quality

10-5(MIL-0-13830A)

Perpendicularity

<5'

Wavefront distortion

≤ 0.125λ/25 mm @632.8nm

Surface flatness

λ/8@632nm

Clear aperture

>95%

Chamfer

0.15±0.05mm

Size

D: 2~10mm, L: 3~150mm

Coatings

AR: ≤0.25% @2µm

Optical and spectral properties

Laser transition

3 F4 →3 H6

Laser wavelength

1.87~2.16µm

Temperature dependence of the refractive index

7.3 10-6/K

Absorption cross-section

7.5×10-21cm2

diode pump band

785nm, 680nm

Emission cross section@2013nm

2.9×10-20 cm2

Fluorescence lifetime

11ms

Refractive index@632nm

1.83

 

Applications of Thulium-Doped Yttrium Aluminum Garnet Crystal

- 2000m laser
- Medical laser
- Laser radar
- Atmospheric sensing
- Military engineering
- Photoelectric countermeasures
- Remote sensing

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