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High Quality for Middle Infrared Nonlinear Optical Crystal - Co:Spinel Crystals – Dien


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High Quality for Middle Infrared Nonlinear Optical Crystal - Co:Spinel Crystals – Dien Detail:

Passive Q-switches or saturable absorbers generate high power laser pulses without the use of electro-optic Q-switches, thereby reducing the package size and eliminating a high voltage power supply. Co2+:MgAl2O4 is a relatively new material for passive Q-switching in lasers emitting from 1.2 to 1.6μm, in particular, for eye-safe 1.54μm Er:glass laser, but also works at 1.44μm and 1.34μm laser 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 ratio of Q-switch, i.e. the ratio of initial (small signal) to saturated absorption is higher than 10.


Features

•  Suitable for 1540 nm eye-safe lasers
•  High absorption section
•  Negligible excited state absorption
•  High optical quality
•  Uniformly distributed Co


Applications

•  Eye-safe 1540 nm Er:glass laser
•  1440 nm laser
•  1340 nm laser
•  Eye-safe laser range finder


Basic Properties

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
Specific Heat/ (J·g-1·K-1) 1.046
Thermal Expansion /（10-6 /°C@25°C ） 5.9
Hardness (Mohs) 8.2
Extinction Ratio 25dB
Orientation [100] or [111] < ±0.5°
Optical density 0.1-0.9
Damage Threshold >500 MW/cm2
Doping concentration of Co2+ 0.01-0.3 atm%
Absorption coefficient 0 ～ 7 cm-1
Working wavelength 1200 – 1600 nm
Coatings AR/AR@1540，R<0.2%; AR/AR@1340，R<0.2%


Technical Parameters

Orientation Tolerence < 0.5°
Thickness/Diameter Tolerance ±0.05 mm
Surface Flatness <λ/8@632 nm
Wavefront Distortion <λ/4@632 nm
Surface Quality 10/5
Parallel 10〞
Perpendicular 5ˊ
Clear Aperture >90%
Chamfer <0.1×45°
Maximum dimensions Dia(3-15)×(3-50)mm
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Our advancement depends on the superior gear ,superb talents and consistently strengthened technology forces for High Quality for Middle Infrared Nonlinear Optical Crystal - Co:Spinel Crystals – Dien , The product will supply to all over the world, such as: Gabon, Ghana, Greece, Our solutions have national accreditation requirements for qualified, good quality products, affordable value, was welcomed by individuals all over the world. Our products will continue to improve inside the order and appear forward to cooperation with you, Definitely should any of those goods be of curiosity to you, be sure to letus know. We'll be satisfied to supply you a quotation up on receipt of the detailed needs.
We are long-term partners, there is no disappointment every time, we hope to maintain this friendship later!
5 Stars By Stephen from Slovak Republic - 2018.11.22 12:28
Speaking of this cooperation with the Chinese manufacturer, I just want to say"well dodne", we are very satisfied.
5 Stars By Novia from Surabaya - 2018.12.14 15:26

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