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NdYAG Slab
型号:
Advantages of Nd:YAG Include:
● High gain
● Low threshold
● High efficiency
● Low loss at 1.06μm
● Good thermal conductivity and thermal shock characteristics
● Mechanical strength
● High optical quality
● Material characteristics that allow for various modes of operation
(CW,pulsed,Q-switched,mode locked,and cavity dumped)

Nd:YAG has been and continues to be the most mature and most widely used crystals for lasers, no matter solid state or lamp pumped, CW or pulsed.It possesses a combination of properties uniquely favorable for laser operations.  

NdYAG with hot application in slab lasers.

Slab lasers represent one class of high-power solid-state bulk lasers, where the gain medium (laser crystal) has the form of a slab. Typically, a laser slab is thin in one dimension, compared with the larger extent in the other two directions. However, other lasers without a large aspect ratio of the gain medium are sometimes also called slab lasers, simply because their gain medium has a rectangular rather than a circular cross-section. Such lasers are actually often not very different from rod lasers, also in terms of power scaling

Specificaiton of Slab of NdYAG

Width

3mm to 20mm

Height

3mm to 12mm

Length

20mm to 150mm

Flatness

S1&S2 <λ/10 at 633nm

S3&S4 <λ/4 at 633nm

Perpendicularity

< 3 arc minutes

Parallelism

10 arc sec

Surface quality

S1,S2 S3,S4 10/5 per MIL-0-13830B

Coating

2um SiO2 layer with AR 808nm or upon customer request


Properties of NdYAG:

Chemical Formula

Nd:Y3A15O12

Crystal Structure

Cubic

Lattice Constants

12.01Ä

Concentration

~ 1.2 x 1020 cm-3

Melting Point

1970 °C

Density

4.56 g/cm3

Mohs Hardness

8.5

Refractive Index

1.82

Thermal Expansion Coefficient

7.8 x 10-6 /K [111], 0 - 250 °C

Thermal Conductivity

14 W/m /K @20 °C, 10.5 W /m /K @100 °C.

 Lasing Wavelength

1064 nm

Stimulated Emission Cross Section

2.8x10-19 cm-2

Relaxation Time of Terminal Lasing Level

30 ns

Radiative Lifetime

550 ms

Spontaneous Fluorescence

230 ms

Loss Coefficient

0.003 cm-1 @ 1064 nm

Effective Emission Cross Section

2.8 x 10-19 cm2

Pump Wavelength

807.5 nm

Absorption band at pump wavelength

1 nm

Linewidth

0.6 nm

Polarized Emission

Unpolarized

Thermal Birefringence

High

 

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