Cr YAG Q Switch Crystals

Cr 4+ :Y 3 Al 5 O 12 , the so called Cr 4+ :YAG, can be used as working medium of 1350~1600nm lasers and 900~1200nm passive Q-switching lasers. Cr 4+ :YAG provides a large absorption cross section in the 900~1200 nm spectral region with an absorption center near 1064 nm, which is...

Product Details


Cr YAG Q Switch Crystals

Description

Cr4+:Y3Al5O12, the so called Cr4+:YAG, can be used as working medium of 1350~1600nm lasers and 900~1200nm passive Q-switching lasers. Cr4+:YAG provides a large absorption cross section in the 900~1200 nm spectral region with an absorption center near 1064 nm, which is well suitable for diode or lamp pumped Nd:YAG, Nd:YLF, Nd:YVO4, Yb:YAG lasers. Typically, Cr4+:YAG can be grown by Czochralski method. A small proportion of Cr3+ are induced to increase valence to Cr4+ by introducing charge compensation impurities Ca2+ and Mg2+. In recent years, Cr4+:YAG is taking the place of traditional crystal materials such as LiF and Dye owning a variety of prominent features, including merits of good chemical stability&thermal conductivity, UV resistant, and high damage threshold and easily to be operated.

Cr:YAG is one of several laser crystals in which near infrared laser action results from the presence of tetravalent chromium ions in a suitable host. In addition to the favorable thermal, mechanical and optical qualities of YAG, the most attractive feature of Cr:YAG is a broad emission band centered near 1440 nm, and extending from approximately 1100 to 1600 nm. Its absorption spectrum consists of three bands centered at 480, 640, and 1000 nm with long pump wavelength band at wavelengths between 810 and 1080 nm. The spectral properties of this material have led to widespread use of Cr:YAG as a passive Q-switch in Nd3+-based lasers. Such a broad gain bandwidth also offered the possibility of ultrashort pulse generation. Mode-locked Cr:YAG lasers have used to provide ~THz frequency comb that spanned a large number of acetylene overtone transitions.


Absorption Spectrum of Cr4+:YAG crystal

image004.png

Features

•  Large absorption cross section in the 0.9~1.2 micrometer spectral region

•  High damage threshold, good thermal conductivity, good chemical stability

•  No high voltage power supply needed

•  Compact diffusion bonding available

•  Higher reliability & longer lifetime   

•  Lower cost OEM components


Applications

•  Passive Q-switch for Nd:YAG Lasers

•  Passive Q-switch for Yb:YAG Lasers

•  Passive Q-switch for NdYVO4 Lasers

•  Injection seeding of OPOs

•  Mode-locked lasers

•  Optical Coherence Tomography   

•  Pumping erbium-doped lasers and amplifiers


Chemical and physical properties

Property

Value

Chemical formula 

Cr4+:Y3Al5O12

Crystal structure

cubic - la3d

Lattice parameters, Å 

12.01

Orientation

[100] or [110] < ±0.5°

Mass density 

4.56 g/cm3

Mohs hardness

8.5

Young's modulus

335 GPa

Tensile strength

2 GPa

Melting point

1970°C

Thermal conductivity

0.1213

Specific Heat/ (J·g-1·K-1)

0.59

Thermal Expansion /(10-6/°C@25°C ) 

7.8 <111>

7.7 <110>

8.2 <100>

Thermal shock resistance parameter

800 W/m

Extinction Ratio

25dB

Poisson Ratio

0.25

Refractive Index @1064 nm

1.83

Charge compensating ion

Ca2+, Mg2+


Optical properties

Property

Value

Optical Density    

0.1 to 0.8

Fluorescence lifetime

3.4µs

Concentrations

0.5 mol % ~ 3 mol %

Emission wavelength

1350 nm ~ 1600 nm

Absorption Coefficient

1.0 cm-1 ~ 7 cm-1

Ground state absorption cross section

4.3x10-18 cm2

Emission state absorption cross section:

8.2x10-19 cm2

Transmission

10% to 90%

Coatings

AR≤ 0.2% @1064nm

Damage Threshold:

> 500 MW / cm2


Polishing Specification

Property

Value

Orientation Tolerance

< 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

Clear Aperture

>90%

Chammfer

<0.1×45°

Maximum dimensions

2*2-15*15 mm×20mm


Standard products

Initial transmission @1064nm

Dimensions,mm

Coatings

  Surface   Flatness

Surface Quality

(scratch/dig)

T0=30%

dia 5


AR≤0.2% @1064nm

 

<λ/8@632 nm

10/5

3x3

5x5

T0=40%

dia 5

3x3

5x5

T0=50%

dia 5

3x3

5x5

T0=60%

dia 5

3x3

5x5

T0=70%

dia 5

3x3

5x5

T0=80%

dia 5

3x3

5x5

T0=85%

dia 5

3x3

5x5

T0=90%

dia 5

3x3

5x5

T0=95%

dia 5

3x3

5x5

T0=97%

dia 5

3x3

5x5



With Q Switch Crystals for sale, it is one of the leading manufacturers and supplies of good cr yag q switch crystals, welcome to buy and wholesale products at good price from our factory.

Hot Tags: cr yag q switch crystals manufacturers, suppliers, wholesale, buy, price, for sale
Related Products

Find Us On

Contact Us

No.3, Hengda Road, Economic and Technological Development Zone, Nanjing, China
+86-25-83705420
sales@meta-photonics.com
http://www.meta-laser.com
Copyright © MetaLaser INC All rights reserved.