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  • Name: Nd:YAG
  • No.: 132
  • Update: 2014-08-01
  • Views : 382

Neodymium-doped Yttrium-Aluminum Garnet (Nd:YAG) crystal is the best of the rare earth garnet materials that are characterized by four-level system which permits low threshold operation both in pulsed and CW mode. It is the most mature and widely used solid-state laser material adopted by R&D, medical, industrial and military customers. Its properties are a good compromise between the strengths and weaknesses of its competition. Nd:YAG crystals are used in all types of solid-state lasers systems, e.g. frequency-doubled continuous wave laser, high-energy Q-switched pulse laser, etc. Compared with other laser crystals, its fluorescence lifetime is twice that of Nd:YVO4, and thermal conductivity is also better.

 

APPLICATION:

Nd:YAG is widely used solid-state laser material adopted by R&D, medical, industrial and military customers. For example, it can operates in the following applications.

Nd:YAG can produce blue laser with the frequency-doubling of 946nm

Nd:YAG can be operated in a very high power laser up to kw level at 1064nm

Nd:YAG can be Q-switched with Cr4+YAG directly

Nd:YAG can be used for high power green laser for SHG@1064nm

ADVANTAGE:

High Gain,  Low Threshold,  High Efficiency

High damage threshold

High thermal conductivity

Low Loss at 1.06 um,  High Optical Quality

Good Mechanical Properties

 

 

Dimension Tolerance

D(+0/-0.05)  * L(+/-0.5) mm

Cut Angle

<111> or<100>

Angle Tolerance

 +/-5°

Perpendicularity

 ≤5′

Scratch/Dig

10/5

Chamfer

<0.1mmx45°

Parallelism

 ≤10″

Chips

<0.1mm

Flatness

 λ/10@633nm

Clear Aperture

95%

Wavefront Distortion

 λ/6@633nm

Extinction Ratio

 25dB

Coatings

C1:AR@1064(R<0.2%)

C2:AR@1064(R<0.2%)&808(R<0.5%)

C3:AR@946(R<0.2%)&473(R<0.5%)

C4:HR@946(R>99.8%)&473(R>99.5%)

     &HT@1064(T>90%)&1319(T>90%)&808(T>95%)

Damage Threshold

1GW/cm² 10ns 10Hz at 1064nm

 

 

 

P/N

Doping

Cut Angle

Size(mm)

Coating

YAG-11-0305-C1/C1

1.1%

<111>

Dia.3x50

AR/AR@1064nm

YAG-11-0404-C1/C1

1.1%

<111>

Dia.4x40

AR/AR@1064nm

YAG-11-0505-C1/C1

1.1%

<111>

Dia.5x50

AR/AR@1064nm

YAG-11-05115-C1/C1

1.1%

<111>

Dia.5x115

AR/AR@1064nm

YAG-11-0608-C1/C1

1.1%

<111>

Dia.6x80

AR/AR@1064nm

YAG-11-0610-C1/C1

1.1%

<111>

Dia.6x100

AR/AR@1064nm

YAG-11-06115-C1/C1

1.1%

<111>

Dia.6x115

AR/AR@1064nm

YAG-11-0612-C1/C1

1.1%

<111>

Dia.6x120

AR/AR@1064nm

YAG-11-0615-C1/C1

1.1%

<111>

Dia.6x150

AR/AR@1064nm

YAG-11-0708-C1/C1

1.1%

<111>

Dia.7x80

AR/AR@1064nm

YAG-11-0710-C1/C1

1.1%

<111>

Dia.7x100

AR/AR@1064nm

YAG-11-07115-C1/C1

1.1%

<111>

Dia.7x115

AR/AR@1064nm

YAG-11-0714-C1/C1

1.1%

<111>

Dia.7x140

AR/AR@1064nm

YAG-11-0808-C1/C1

1.1%

<111>

Dia.8x80

AR/AR@1064nm

YAG-11-0810-C1/C1

1.1%

<111>

Dia.8x100

AR/AR@1064nm

YAG-11-0811-C1/C1

1.1%

<111>

Dia.8x110

AR/AR@1064nm

YAG-07-4425-C2/C1

0.7%

<111>

4x4x25

S1:AR@1064&808nm

S2:AR@1064nm

YAG-11-332-C4/C3

1.1%

<111>

3x3x2

S1:HR@946&473&HT@1064

&1319&808nm

S2:AR@946&473nm

 

 

Physical Properties:

 

Chemical Formula

Nd:Y3Al5O12

Crystal Structure

Cubic

Lattice Parameter

12.01Å

Density

4.55g/cm3

Melting Point

1970oC

Mohs Hardness

8.5

Water Absorption

Zero

Extinction Ratio

> 28 dB (according to actual sizes)

Thermal Expansion Coefficient

[100] Orientation--8.2x10-6/oC (0-250oC)

[110] Orientation--7.7x10-6/oC (0-250oC)

[111] Orientation--7.8x10-6/oC (0-250oC)

Thermal Conductivity

20oC---0.0320 cal/secoC cm

40oC---0.0290 cal/secoC cm

100oC--0.0250 cal/secoC cm

200oC--0.0225 cal/secoC cm

Modulus of Elasticity

44.9x106 PSI

Tensile Strength

25-30x106 PSI

 

Optical properties:

 

Laser Transition

4F3/2 --> 4I11/2

Photon Energy

1.86×10-19J

Lasing Wavelength

1.064µm, 1.320µm

Emission Linewidth

4.5Å @1.064µm

Stimulated Emission Cross Section

2.8x10-19 cm2 @1.064µm

Radiative Lifetime

550µs

Fluorescence Lifetime

230µs

Pumping Wavelength

0.8075µm

Absorption Coefficient

7.2 cm-1 @0.808µm

Absorption Length

1.42 mm @0.808µm

Intrinsic Loss Coefficient

0.003 cm-1 @1.064µm

Polarized Laser Emission

non-polarization

Refractive Index

1.820 @1.064µm