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Arminas Butkus +370 5 219 4884
Co:Spinel crystals
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Co:Spinel crystals

Main features

 

  • Low optical losses in the wavelength range of 1,3 µm - 1,6 µm
  • The high laser-induced damage threshold
  • Custom crystals available upon request

 

Application examples

 

  • Passive Q-switch for Er:Glass lasers @1,54 µm
Request custom View stock
  • Description
  • Properties
  • Absorption and emission curves
  • Standard specifications

Co:Spinel is a recently developed material, which has been proven to be a very effective passive Q-switch in lasers emitting in the range of 1,2 µm - 1,6 µm. Co:Spinel has a high absorption cross-section, which permits Q-switch operation of Er:glass laser (both flash-lamp and diode-laser pumped) without an intracavity focusing. Negligible excited-state absorption results in a high contrast Q-switch operation, the ratio of the initial (small signal) to saturated absorption is higher than 10.

Material related spectroscopic and thermo-mechanical properties
Material σgsa1)@1,54 µm σesa2)@1,54 µm τsa3) Laser crystal λlaser σgsaem4)
Co2+:MgAl2O4 3,5 × 10-19 cm2 0,1 × 10-19 cm2 220-350 ns Nd:YAP 1,34 µm 1,5
Nd:KGW 1,35 µm 4
Nd:YAG 1,44 µm 12
Er:glass 1,54 µm 40

 

Crystal structure Cubic
Density 3,58 g/cm3
Thermal expansion coefficient 6,14 × 10-6 K-1
Thermal conductivity 17 Wm-1K-1
Mohs hardness 8
Refractive index 1,6-1,75

Co:Spinel crystals
Available initial transmission 50-99%@1535 nm
Initial transmission tolerance ±1% (for values larger than 80%)
Clear aperture >90%
Face dimensions tolerance +0,0/-0,1 mm
Parallelism error <20 arcsec
Perpendicularity error <10 arcmin
Protective chamfers <0,1 mm at 45˚
Surface quality 20-10 S-D
Surface flatness <λ/[email protected],8 nm
Wavefront distortion <λ/[email protected],8 nm 
Coatings AR(R<0,15%)@1535 nm
Laser-induced damage threshold >8 J/cm2@1535 nm, 10 ns
Mount Unmounted
Order your item
Face dimensions Initial transmission Coatings SKU PRICE QUANTITY
3x3 mm
70%
7330
440 €
3x3 mm
80%
7331
440 €
3x3 mm
85%
7332
440 €
3x3 mm
90%
7333
440 €
3x3 mm
92%
7334
440 €
3x3 mm
95%
7335
440 €
3x3 mm
97%
7336
440 €
5x5 mm
70%
7337
540 €
5x5 mm
80%
7338
540 €
5x5 mm
85%
7339
540 €
5x5 mm
90%
7340
540 €
5x5 mm
92%
7341
540 €
5x5 mm
95%
7342
540 €
5x5 mm
97%
7343
540 €