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CrYAG
型号:CrYAG
High power laser pulses without electro-optic Q-switches
Good thermal conductivity
High damage threshold
Pricision control in Transmittance

Cr4+:YAG Crystal is an excellent crystal for passively Q-switching diode pumped or lamp-pumped Nd:YAG, Nd:YLF, Nd:YVO4 or other Nd and Yb doped lasers at wavelength from 0.8 to 1.2 µm. Because of its chemical stability, durability, UV resistance, good thermal conductivity and high damage threshold (> 500 MW/cm2) and easy machining, it is replacing traditional materials, such as LiF, organic Dye and color centers.  

Physical Properties

 

Chemical Formula

Cr4+:Y3A15O12

Crystal Structure

Cubic garnet

Recovery time

8.5μs

Hardness 

8.5 Mohs

Density

4.56g/cm

Orientation

[100]+/-10°

Thermal conductivity

12.13w/m/kv

Refractive index

1.82 @ 1064nm

Optical Properties

 

Base state absorption cross section

σs1=4.3x10-18cm2

Emission state absorption cross section

σs2=8.2x10-19cm2

Fluorescence lifetime

3.4us





















Specification of CrYAG

Main Specifications

 

Cr4+ dopant concentration:

0.5 mol% ~ 3 mol%

Aperture:

2x2 ~ 14x14mm

Length:

0.1 ~ 12mm

Initial transmission:

10% ~ 99%

Coating:

Antireflective

Angle tolerance:

Δθ< ±0.5°; Δφ<±0.5°

Dimension tolerance:

(W±0.1mm) x (H±0.1mm) x (L + 0.2mm/-0.1mm)

Flatness:

λ/8 @ 633nm

Scratch/Dig code:

10/5 Scracth/dig per MIL-O-13830B

Parallelism:

better than 20 arc seconds

Perpendicularity:

5 arc minutes

Wavefront distortion:

less than λ/8 @ 633nm

Clear aperture:

> 90% central area

Note:
To inquire or order a finished Cr4+ crystals, please provide specification as  listed above, particularly the size, initial transmission and coatings.

 

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