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
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
IPL Filters For Laser Beauty Machine
Fused Silica IPL Filter For Hair Removal

IPL Filter is the key optical element for IPL (intense Pulsed Light) machine, which blocks the UV wave and transmits the useful wave from 400nm to 1200nm for laser equipment, such as photo-rejuvenation hair removal, vascular and acne treatment, skin rejuvenation.

Read More
Pure YVO4 Yttrium Orthovanadate crystals
YVO4 crystal Yttrium Orthovanadate

The Yttrium Orthovanadate (YVO4) is a positive uniaxial crystal grown with Czochralski method. It has good temperature stability and physical and mechanical properties. It is ideal for optical polarizing components because of its wide transparency range and large birefringence. It is an excellent synthetic substitute for Calcite (CaCO3) and Rutile (TiO2) crystals in many applications including fiber optic isolators and circulators, interleavers, beam displacers and other polarizing optics.

Read More
Ultra Narrow Bandpass Filter
IR Cut Bandpass Antireflection Coating Filter

A band pass filter is a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range, and it’s used to selectively transmit a portion of the spectrum while rejecting all other wavelengths.

Read More
Er:YAG Crystal for solid-state laser
Er:YAG Crystals (Erbium-Doped Yttrium Aluminum Garnet)

Er: YAG (Erbium-doped Yttrium Aluminum Garnet) is a solid-state crystal widely used as a laser medium in various medical and dental applications. It is made by doping erbium ions into yttrium aluminum garnet (YAG) crystals and can emit laser light with a wavelength of approximately 2.94 micrometers in the infrared spectrum.

Read More
Long Pass Filter Fluorescence
Longpass Filters For Vision Inspection Apllication

Longpass filters are ideal for a variety of applications, such as gas monitoring, temperature, sensing, thermal imaging and motion sensing, etc. Longpass filters block shorter wavelengths and transmit longer wavelengths. Blocking can be from reflectance, absorption or a combination. Transmission in the pass band can be enhanced with an antireflection coating on the second surface.

Read More
UV Fused Silica Corner Cube Retroreflectors
UV Fused Silica Corner Cube Retroreflectors Prisms

Corner Cube Prism also called Retroreflector.It has three mutually perpendicular surfaces and a hypotenuse face. Light entering through the hypotenuse is reflected by each of the three surfaces in turn and will emerge through the hypotenuse face parallel to the entering beam regardless of the orientation of the incident beam. For its special performance, it is often used to the distance measurement, optical signal process and laser.

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