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 |
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Nd:YAG |
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Abal
OptoTek社 (AOTK)
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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, |
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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
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High gain
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Low threshold
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High efficiency
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Low loss
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Good thermal conductivity and thermal
shock characteristics
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Large mechanical strength
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High optical quality
Basic Properties
Chemical
Formula
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Y2.97Nd0.03Al5O12
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Crystal
Structure
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Cubic
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Lattice
Constants
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12.01Å
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Mohs
Hardness
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8.5
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Tensile
Strength
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175-200
Mpa
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Melting
Point
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1950°C
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Density
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4.56
g/cm3
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Nd
Atoms / cm3
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1.38
x 1020
(1.0
at % Nd)
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Refractive
Index
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1.818
at
1064 nm
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Thermal
Expansion Coefficient
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7.0
x 10-6 /K
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Thermal
Conductivity
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14
W/m/K @20°C,
10.5 W/m/K @100 °C
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Specific
Heat
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0.59
Jg-1/K
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Thermal
Shock Resistance
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790
W/m
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Thermal
Optical Coefficient
(dn/dt)
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7.3
x 10-6 /°C
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Lasing
System
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Four
Level
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Lasing
Upper State
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4F3/2
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Lasing
Wavelength
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1064
nm, 1319.8 nm, 946 nm
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Fluorescent
Lifetime
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230
μs
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Loss
Coefficient
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0.003
cm-1 @ 1064 nm
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Effective
Emission Cross Section
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2.8
x 10-19 cm2
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Standard Specifications of Nd:YAG Rods
Extinction Ratio and Wavefront
Distortion of Rods
Nd
concentrations
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0.6
± 0.1 at %
0.8
± 0.1 at %
1.1
± 0.1 at %
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Orientation
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<111>
within 5°
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Rod
sizes
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Diameter
2〜15
mm, Length 0.5〜180
mm
Upon request of customer
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Dimensional
Tolerances
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Diameter
+0.000"/-0.002"
Length +
0.02"/-0.00”
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Barrel
finish
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Fine
ground to 50~80microinches
(other
barrel finishes
available
upon request)
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Parallelism
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≤10
arc seconds
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Perpendicularity
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≤5
arc minutes
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Flatness
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<
λ/10
at 632.8 nm
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Surface
Quality
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10-5
scratch-dig per MIL-O-13830A
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Chamfer
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0.005"±0.002"
x
45°
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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 < 0.20%,
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
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Standard Dimension:
- Width: from 3 mm to 20 mm
- Height: from 3 mm to 12 mm
- Length: from 20 mm to 150
mm
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Dimension Tolerance: ±0.02
mm
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Width dimension of slab to
extend radially from center of Nd:YAG boule
within 5°,
when growth axis along <111>
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Surface
S1 & S2 perpendicular to Face S5 to within
5 arc minutes
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Surface
S1 & S2 polished flat to within l/10
@632.8 nm over test region
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Surface
S3 & S4 parallel to each other within 5
arc minutes
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Surface
S3 & S4 polished flat to within l/2
per 1 inch over test region
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Surface
S1, S2, S3 & S4 surface finish 10/5
scratch/dig per MIL-0-13830A
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Surface
S5 & S6 fine ground
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Protective chamfers to be
applied to all edges unless otherwise stated
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Parallelogram-shape slabs also
available in AOTK
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