Senior sales engineer
Arminas Butkus +370 5 219 4884
Co:Spinel crystals
INQUIRY FORM
Please fill out this field
Please fill out this field
Please fill out this field
Please fill out this field
Please fill out this field
Close
Close
Success!

One of our 4Lasers team members will contact you as soon as possible.

Go back to homepage

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/8@632,8 nm
Wavefront distortion <λ/4@632,8 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
80%
AR/AR@1535 nm
7331
340 €
3x3 mm
85%
AR/AR@1535 nm
7332
340 €
3x3 mm
90%
AR/AR@1535 nm
7333
340 €
3x3 mm
92%
AR/AR@1535 nm
7334
340 €
3x3 mm
95%
AR/AR@1535 nm
7335
340 €
3x3 mm
97%
AR/AR@1535 nm
7336
340 €
5x5 mm
80%
AR/AR@1535 nm
7338
390 €
5x5 mm
85%
AR/AR@1535 nm
7339
390 €
5x5 mm
90%
AR/AR@1535 nm
7340
390 €
5x5 mm
92%
AR/AR@1535 nm
7341
390 €
5x5 mm
95%
AR/AR@1535 nm
7342
390 €
5x5 mm
97%
AR/AR@1535 nm
7343
390 €