Products
Home /CRYSTALS /

Passive Q-switch

/Co2+:MgAl2O4 Cobalt-doped magnesium aluminate spinel

Co2+:MgAl2O4 Cobalt-doped magnesium aluminate spinel

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.

  • Product Origin:

    China
  • Shipping Port:

    Fuzhou, China
  • Lead Time:

    3-4weeks
Share To : f t y b l ins
  • Product Detail

Descriptions:



Co2+:MgAl2O4 Cobalt-doped magnesium aluminate spinel is a relatively new material for passive Q-switching specially for eye-safe 1.54 μm Er:glass laser, but also works at 1.44 μm and 1.34 μm wavelengths.



Main applications:

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

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


Advantages:

1) Rare excited absorption

2) High constant of Q-switch

3) High absorption section

4) Long excited lifetime

5) Evenly distributed cobalt

6) Wide absorption band

Basic properties of Cospinel

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


HGO offers Cospinel specifications:

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


Why Choose HGO ?

HG OPTRONICS.,INC. supplies very high quality of Co2+:MgAl2O4 Cobalt-doped magnesium aluminate spinel.The use of high quality starting materials for crystal growth, boule interferometry, and precise measurement of initial transmission and absorption using transmission spectroscopy and ZYGO measurements, assures that each crystal will comply with customer’s specification and perform well in laser system.

Tolerance of initial transmission can be well controlled within as high precision as 0.5% which could be very essential to some delicate laser systems. Besides, based on HGO’s advanced bonding technology, high quality of optical bonding kits between Er:Yb:glass and cospinel q-switch can also be supplied.

HGO could also provide high quality polishing and apply high laser induced damage threshold coating for the switch.and also for other related cavity lens and mirrors for the eye safe lasers systems.

Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.
Related Products
Cr4+:YAG passive q-switch
Cr4+:YAG crystals Chromium Doped Yttrium AIuminum Garnet

Cr4+:YAG (Y3Al5O12) crystal is ideal for passive Q-switch operation of Nd:YAG and other Nd3+ or Yb3+ doped laser crystals in the wavelength range of 900 nm to 1200 nm. Passive Q-switches or saturable absorbers provide high power laser pulses without electro-optic Q-switches, thereby reducing the package size and eliminating a high voltage power supply. A remarkable feature of Cr4+:YAG is the high damage threshold of >10 J/cm2@1064 nm, 10 ns. Its absorption band extends from 900 nm to 1200 nm and peaks around 1060 nm with a very large absorption cross-section.

Read More
Quartz Windows Fused Silica Window
UV Fused Silica High-Precision Window

Fused silica window, with low thermal expansion,  providing stability and resistance to thermal shock over large temperature excursions, wide thermal operating range and high laser damage threshold, is a better choice for transmission from UV to IR.

Read More
Reflective Of Colour Glass Window
AR Coated Colour Glass Window

Color glass changed the spectral properties of optical radiation. They therefore allow scientific experiments and industrial applications where that change is necessary. You can combine color glass filters together to change the bandpass or to increase the attenuation. Color glass change the spectral properties of optical radiation. They therefore allow scientific experiments and industrial applications where that change is necessary. You can combine color glass filters together to change the band pass or to  increase the attenuation.

Read More
Processing services
Crystals and optics processing services

HGO is a company has skillful workers with wide processing experiences and skillful processing technique. Thus we also offer processing service such as oriented, cutting, grinding, polishing ,repolishing, coating ,recoating and diffusion bonding etc. Customers are very welcome to contact with us for further information.

Read More
Elliptical Plate Beamsplitters
Visible And NIR Plate Beamsplitters

Our beamsplitter plates can be used in high power laser system. When using beamsplitter plates, it is important to make it in mind that the two partial beams travel in different optical paths. The optical paths depend on the incident angle and the thickness of plates.

Read More
Narrow Band Beamsplitters Cube
Non-Polarizing Cube Beamsplitters

Non-Polarizing Cube Beamsplitters also called NPBS Cube is a more sophisticated type consisting of two right- angle prisms cemented together at their hypotenuse faces.The cemented face of one prism is coated. Before cementing, with a metallic or dielectric layer having the desired reflecting properties, both in the percentage of reflection and the desired color. The absorption loss to the coating is minimal and transmission and reflection could be designed to 10%, 20%, 30%, 40%, 50%, etc.

Read More
High Presion Double Concave Lenses
Coated Double-Concave Lenses

Double Concave Lenses are used in beam expansion, image reduction, or light projection applications. These lenses are also ideal for expanding the focal length of an optical system. Double Concave Lenses, which have two concave surfaces, are Optical Lenses with negative focal lengths. HG OPTRONICS offers Double Concave lenses with a variety of coating options.

Read More
N-BK7 Right Angle Prisms
High Precision Optical Glass Right Angle Prisms

In optics, a prism is a transparent optical element with flat, polished surfaces that refract light. At least two of the flat surfaces must have an angle between them. The exact angles between the surfaces depend on the application. The traditional geometrical shape is that of a triangular prism with a triangular base and rectangular sides, and in colloquial use "prism" usually refers to this type. Some types of optical prism are not in fact in the shape of geometric prisms. Prisms can be made from any material that is transparent to the wavelengths for which they are designed.

Read More
Leave A Message
Leave A Message
If you are interested in our products and want to know more details,please leave a message here,we will reply you as soon as we can.

Home

Products

about

contact