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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We always follow the principle "Quality Very first, Prestige Supreme". We have been fully committed to delivering our customers with competitively priced high-quality products and solutions, prompt delivery and experienced services for High Quality for Middle Infrared Nonlinear Optical Crystal - Co:Spinel Crystals – Dien , The product will supply to all over the world, such as: Bogota, Greek, Armenia, Our company regards "reasonable prices, efficient production time and good after-sales service" as our tenet. We hope to cooperate with more customers for mutual development and benefits. We welcome potential buyers to contact us.

The customer service reprersentative explained very detailed, service attitude is very good, reply is very timely and comprehensive, a happy communication! We hope to have a opportunity to cooperate.