E-mail
Jiaxing AOSITE Photonics Technology Co.,Ltd.
co spinel
co spinel

Co2+: MgAl2O4 Laser Crystals

Co2+:MgAl2O4 Cospinel is a relatively new material for passive Q-switching in lasers emitting from 1.2 to 1.6 μm, in particular, for eye-safe 1.54 μm Er: glass laser, but also works at 1.44 μm and 1.34 μm wavelengths. Spinel is a hard, stable crystal that polishes well. Cobalt substitutes readily for magnesium in the Spinel host without the need for additional charge compensation ions. High absorption cross section (3.5×10^-19 cm2) permits Q-switching of Er: glass laser without intracavity focusing both with flash-lamp and diode-laser pumping. Negligible excited-state absorption results in high contrast of Q-switch, i.e. the ratio of initial (small signal) to saturated absorption is higher than 10.

Applications of Co2+: MgAl2O4 Laser Crystals


  • Passive Q-switch for Radar and Ranging Er: Glass lasers @1,35µm

  • Passive Q-switch for Medical lasers @1,500 µm


Advantages of Co2+: MgAl2O4 Laser Crystals


  • Rarely excited absorption

  • The high constant of Q-switch

  • High absorption section

  • Long excited lifetime

  • Evenly distributed cobalt

  • Wide absorption band


Specifications of Co2+: MgAl2O4 Laser Crystals


Orientation:

<100>or<111>

Initial absorption coefficient

0~7cm-1@1064nm

Initial transmission

50%~99%

Wavefront Distortion:

λ/8per inch @ 632.8 nm

Surface Quality:

20/10 Scratch/Dig MIL-O-1380A

Parallelism:

< 10″

Perpendicularity:

< 10′

Clear Aperture:

> 90%

Surface Flatness:

< λ/10 @ 632.8 nm

Chamfer:

< 0.1 mm @ 45deg.

Size

Upon customer request

Coating

AR/HR/PR coating upon customer’s request

Damage Threshold

750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz

Quality Warranty Period

One year under proper use


Basic Properties of Co2+:MgAl2O4 Crystal


Chemical formula

Co2+:MgAl2O4

Crystal structure

Cubic

Lattice parameters

8.07Å

Density

3.62 g/cm3

Melting Point

2105°C

Refractive Index

n=1.6948 @1.54 μm

Thermal Conductivity/(W·cm-1·K-1@25°C)

0.033W

Thermal Expansion /(10-6 /°C@25°C )

1.046

Specific Heat/ (J·g-1·K-1)

5.9

Hardness (Mohs)

8.2

Extinction Ratio

25dB

Density

1.6-1.75


Related Passive Q-switch Crystals
Contact Us
Welcome your presence, you can send us an email, we will get in touch with you within 24 hours.
Head Office: No. 66, 8 Group, Chengbei Village, Yanguan Town, Jiaxing 314411, China;

Hangzhou Branch: Room 1012, Chunhua Bussiness Center, No. 159, Hangbo Street, Shangcheng District, Hangzhou 310009, Zhejiang, China
Head Office: No. 66, 8 Group, Chengbei Village, Yanguan Town, Jiaxing 314411, China;

Hangzhou Branch: Room 1012, Chunhua Bussiness Center, No. 159, Hangbo Street, Shangcheng District, Hangzhou 310009, Zhejiang, China
sales@ostphotonics.com; info@ostphotonics.com +86-0571-86780460