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Arminas Butkus +370 5 219 4884
Cr:YAG crystals
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Cr:YAG crystals

Main features

 

  • Good chemical stability and reliability
  • Long lifetime and good thermal conductivity
  • Easy to operate
  • Custom crystals available upon request

 

Application examples

 

  • Passively Q-switched lasers for laser rangefinders, LIDAR, and LIBS systems
  • Laser systems where short pulses are required
Request custom View stock
  • Description
  • Properties
  • Specifications

Cr4+:YAG crystals are ideal for passive Q-switch operation of Nd:YAG and other Nd3+ or Yb3+ doped laser crystals in the wavelength range of 900 nm to 1200 nm. A remarkable feature of Cr4+:YAG is the high damage threshold of >10 J/cm2@1064 nm, 10 ns. Its absorption band extends from 900 nm to 1200 nm and peaks around 1060 nm with a very large absorption cross-section.

Spectroscopic and thermo-mechanical properties
Material σgsa, cm2@1,064 µm σesa, cm2@1,064 µm τsa3) Laser crystal λlaser σgsaem4)
Cr4+:Y3Al5O12 46 × 10-19 cm2 8,2 × 10-19 cm2 3,4 μs Nd:YAG 0,946 µm 130
Nd:YAG 1,06 µm 17
Nd:GSAG 1,06 µm 55
Nd:YVO4 1,06 µm 3,5
Nd:GdVO4 1,06 µm 5
Nd:LuVO4 1,06 µm 3,4
Nd:LSB 1,06 µm 40
Nd:YAP 1,08 µm 14
Yb:NLM 1,01 µm 500
Yb:YVO4 1,02 µm 625
Yb:GGG 1,025 µm 250
Yb:YAG 1,03 µm 250
Yb:LuAG 1,03 µm 185
Yb:KGW 1,035 µm 185

 

Crystal structure Cubic
Density 4,56 g/cm3
Thermal expansion coefficient 6,14 × 10-6 K-1
Thermal conductivity 11,2 Wm-1K-1
Mohs hardness 8,2
Refractive index 1,[email protected] nm
Cr:YAG crystals
Initial transmission T0 5-99%@1064 nm
Initial transmission T0 tolerance ±1% (for values larger than 80 %)
Clear aperture >90%
Face dimensions tolerance +0,0/-0,1 mm
Parallelism error <10 arcsec
Perpendicularity error <10 arcmin
Protective chamfers <0,1 mm at 45˚
Surface quality 10-5 S-D
Surface flatness <λ/[email protected],8 nm
Wavefront distortion <λ/[email protected],8 
Coatings AR(R<0,15%)@1064 nm on both sides
Laser-induced damage threshold >10 J/cm2@1064 nm, 10 ns
Mount Unmounted
Order your item
Face dimensions Initial transmission Coatings SKU PRICE QUANTITY
⌀3 mm
20%
7279
195 €
⌀3 mm
30%
7280
195 €
⌀3 mm
40%
7281
195 €
⌀3 mm
50%
7282
195 €
⌀3 mm
60%
7283
195 €
⌀3 mm
70%
7284
195 €
⌀3 mm
80%
7285
195 €
⌀3 mm
85%
7286
195 €
⌀3 mm
90%
7287
195 €
⌀3 mm
95%
7288
195 €
⌀3 mm
98%
7289
195 €
3x3 mm
20%
7290
195 €
3x3 mm
30%
7291
195 €
3x3 mm
40%
7292
195 €
3x3 mm
50%
7293
195 €
3x3 mm
60%
7294
195 €
3x3 mm
70%
7295
195 €
3x3 mm
80%
7296
195 €
3x3 mm
85%
7297
195 €
3x3 mm
90%
7298
195 €