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Broadband,Inc.

 

〒121-0832

東京都足立区

古千谷本町4-7-9

 

お問い合わせ

TEL:03-5838-0082

ask@bblaser.com

 

Nd:YAG

Abal OptoTek社 (AOTK)


Neodymium-doped Yttrium Aluminum Garnet Crystal (Nd:YAG)

Nd:YAG crystal is the most widely used solid-state laser material adopted by industrial, medical, military and scientific customers. Its advantages are: low threshold, high gain, high efficiency, low loss at 1064 nm, as well as high optical quality, good thermal conductivity and thermal shock characteristics and mechanical strength properties, which make Nd:YAG as the most suitable laser material for CW, pulsed, mode locked, Q-switched,  
and cavity dumped modes of operation. AOTK has a complete product line with facilities for the growth, polishing and coating of Nd:YAG crystal. Now, we are able to stably supply the top quality of finished Nd:YAG laser rods and slabs with high optical homogeneity, consistent performance, high processing accuracy for R&D and OEM requirements. Nd:YAG rods for 946 nm and 1319 nm lasers can be provided by AOTK.
We are developing other various ions doped YAG crystals. Cr4+:YAG,
Nd:Ce:YAG, Yb:YAG, Er:YAG crystals are available upon request.

Nd:YAG Advanced Properties

 High gain
 Low threshold
 High efficiency
 Low loss
 Good thermal conductivity and thermal shock characteristics
 Large mechanical strength 
 High optical quality 

Basic Properties

Chemical Formula
Y2.97Nd0.03Al5O12
Crystal Structure
Cubic
Lattice Constants
12.01Å
Mohs Hardness
8.5
Tensile Strength
175-200 Mpa
Melting Point
1950°C
Density
4.56 g/cm3
Nd Atoms / cm3
1.38 x 1020 (1.0 at % Nd)
Refractive Index
1.818 at 1064 nm
Thermal Expansion Coefficient
7.0 x 10-6 /K
Thermal Conductivity
14 W/m/K @20°C, 10.5 W/m/K @100 °C
Specific Heat
0.59 Jg-1/K
Thermal Shock Resistance
790 W/m
Thermal Optical Coefficient (dn/dt)
7.3 x 10-6 /°C
Lasing System
Four Level
Lasing Upper State
4F3/2
Lasing Wavelength
1064 nm, 1319.8 nm, 946 nm
Fluorescent Lifetime
230 μs
Loss Coefficient
0.003 cm-1 @ 1064 nm
Effective Emission Cross Section
2.8 x 10-19 cm2

Standard Specifications of Nd:YAG Rods

 

 


Extinction Ratio and Wavefront Distortion of Rods

Nd concentrations
0.6 ± 0.1 at %
0.8 ± 0.1 at %
1.1 ± 0.1 at %
Orientation
<111>  within 5°
Rod sizes 
Diameter 215 mm, Length 0.5180 mm
Upon request of customer 
Dimensional Tolerances 
Diameter +0.000"/-0.002" 
Length
+ 0.02"/-0.00” 
Barrel finish 
Fine ground to 50~80microinches
(other barrel finishes available upon request) 
Parallelism 
10 arc seconds
Perpendicularity 
5 arc minutes
Flatness
< λ/10 at 632.8 nm
Surface Quality
10-5 scratch-dig per MIL-O-13830A
Chamfer
0.005"±0.002" x 45°
Coatings I) Both ends AR @ 1064 nm (*)
II) S1 - AR @ 1064 nm & HT @ 808 nm (*)
III) S1 - HR @ 1064 nm & HT @ 808 nm (*)
IV) S1 - HR @ 1064 & 532 nm & HT @ 808 nm (*)
V) Other AR, HR coatings upon requests

*I) R1064 nm <, ;, ;, ; 0.15% per surface
*II) R1064 nm < 0.2
0%, R808 nm < 0.5%
*III) R1064 nm > 99.8%,
T808 nm > 95%
*IV) R1064 nm > 99.8%, R532 nm > 99.5%, T808 nm
> 95%

Standard Specifications of Nd:YAG Slabs

 

 

 Standard Dimension:
    - Width: from 3 mm to 20 mm 
    - Height: from 3 mm to 12 mm
    - Length: from 20 mm to 150 mm
 Dimension Tolerance:
±0.02 mm
 Width dimension of slab to extend radially from center of Nd:YAG boule within 5
°, when growth axis along <111>
 Surface S1 & S2 perpendicular to Face S5 to within 5 arc minutes
 Surface S1 & S2 polished flat to within l/10 @632.8 nm over test region
 Surface S3 & S4 parallel to each other within 5 arc minutes
 Surface S3 & S4 polished flat to within l/2 per 1 inch over test region
 Surface S1, S2, S3 & S4 surface finish 10/5 scratch/dig per MIL-0-13830A
 Surface S5 & S6 fine ground
 Protective chamfers to be applied to all edges unless otherwise stated
 Parallelogram-shape slabs also available in AOTK

 

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