Nd:YAG

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Nd:YAG is a four-level gain medium (except for the 946nm transition), offering substantial laser gain even for moderate excitation levels and pump intensities. It allows for high gain efficiency and thus low threshold pump power. Nd:YAG lasers can be diode pumped or lamp pumped. Flash lamp pumping is possible due to the broadband pump absorption mainly in the 800nm region and the four-level characteristics. The most common Nd:YAG emission wavelength is 1064 nm.

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Product Specifications Physical & Optical Properties Product Features & Applications

Product Specifications

Dimension Tolerance	Diameter (+0/-0.05) * Length (+1/-0.5) mm
Cut Angle	<111>	Dopant Concentration	0.5 at% - 1.1 at%
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	>28dB
Coatings	Standard Coating: AR/AR 1064nm; Other coating upon request
Damage Threshold	1GW/cm² 10ns 10Hz at 1064nm
Ends Type	Parallel, Anti-Parallel, Brewster cut, Flat or Curved

Standard Products

Part Number	Size	Working Wavelength
1.CR.YAG.D95311.C006	φ9.53X116.8	1064nm
1.CR.YAG.D08115.C005	φ8X115	1064nm
1.CR.YAG.D08105.C002	φ8X105	1064nm
1.CR.YAG.D08100.C002	φ8X100	1064nm
1.CR.YAG.D08085.C003	Φ8X85	1064nm
1.CR.YAG.D07120.C004	φ7X120	1064nm
1.CR.YAG.D07121.C002	φ7X121	1064nm
1.CR.YAG.D07085.C002	φ7X85	1064nm

Physical & Optical Properties

Host material formula:	Y₃Al₅O₁₂
Crystal Structure:	Cubic
Lattice Constant (Å):	a=12.01
Thermal Expansion Coefficient (K^-1) :	7 x 10^-6
Thermal Conductivity (W∙cm^-1∙K^-1):	0.14
Melting Point (℃):	1950
Mohs Hardness:	8.5
Density (g/cm³):	4.55
Emission Cross Section (cm^-2):	2.8 x 10^-19 (1064nm)
Fluorescence Lifetime (μs):	230 (1064nm)
dn/dT (℃^-1):	7.3 x 10^-6
Refractive Index (1064 nm):	1.82
Primary Lasing wavelength (nm):	1064

Absorption Spectrum

Nd:YAG Synonyms

Neodymium-doped Yttrium Aluminum Garnet, Neodymium-doped YAG, Nd³⁺:YAG, Nd³⁺:Y₃Al₅O₁₂

Nd:YAG lasers can be diode pumped or lamp pumped. Flash lamp pumping is possible due to the broadband pump absorption mainly in the 800nm region and the four-level characteristics.

The most common Nd:YAG emission wavelength is 1064 nm. Wavelength of 532nm, 355nm and 266nm can be generated by frequency doubling, frequency tripling and frequency quadrupling, respectively. Other emission lines are at 946nm, 1123nm, 1319nm, 1338nm, 1415nm and 1444nm. When used at the 946nm transition, Nd:YAG is a quasi-three-level laser gain medium, all other transitions are four-level transitions.

Typical neodymium doping concentrations are of the order of 1 at. %. High doping concentrations can be advantageous e.g. because they reduce the pump absorption length, but too high concentrations lead to quenching of the upper-state lifetime e.g. via upconversion processes (which is particularly relevant in Q-switched lasers). Also, the density of dissipated power can become too high in high-power lasers.

Nd:YAG is usually used in monocrystalline form, fabricated with the Czochralski growth method. It is available in high quality and in large sizes.

Nd:YAG crystals have a wide range of applications in Medicine, Defense, Machinery, Scientific research, etc.

Applications :

·Diode-pumped Laser, Lamp-pumped Laser, Q-switched Laser

·Pulsed or CW operations

·Materials Processing, Marking, Welding, Cutting

·Medical Laser Systems (Dermatology)

·Laser Range Finding

Our Advantages:

·Crystal Boules growth, cutting, polishing, coating all in house

·Rod: diameter 3mm to 10mm, Length: up to 150mm

·Slab: Parallel, Anti-Parallel, Brewster cut ends