Nd: YAG — Excellent Solid Laser Material

Short Description:

Nd YAG is a crystal that is used as a lasing medium for solid-state lasers. The dopant ,triply ionized neodymium,Nd(lll),typically replaces a small fraction of the yttrium aluminum garnet,since the two ions are of similar is the neodymium ion which provides the lasing activity in the crystal ,in the same fashion as red chromium ion in ruby lasers.

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Product Description

Nd: YAG is still the solid-state laser material with the best comprehensive performance. Nd:YAG lasers are optically pumped using a flashtube or laser diodes.

These are one of the most common types of laser, and are used for many different applications. Nd:YAG lasers typically emit light with a wavelength of 1064nm, in the infrared. Nd:YAG lasers operate in both pulsed and continuous mode. Pulsed Nd:YAG lasers are typically operated in the so-called Q-switching mode: An optical switch is inserted in the laser cavity waiting for a maximum population inversion in the neodymium ions before it opens.

Then the light wave can run through the cavity, depopulating the excited laser medium at maximum population inversion. In this Q-switched mode, output powers of 250 megawatts and pulse durations of 10 to 25 nanoseconds have been achieved.[4] The high-intensity pulses may be efficiently frequency doubled to generate laser light at 532 nm, or higher harmonics at 355, 266 and 213 nm.

The Nd: YAG laser rod produced by our company has the characteristics of high gain, low laser threshold, good thermal conductivity and thermal shock. It is suitable for a variety of working modes (continuous, pulse, Q-switch and mode locking).

It is commonly used in near-far-infrared solid-state lasers, frequency doubling and frequency tripling applications, It is widely used in scientific research, medical treatment, industry and other fields.

Basic Properties

Product name Nd:YAG
Chemical Formula Y3Al5O12
Crystal structure Cubic
Lattice constant 12.01Å
Melting point 1970°C
orientation [111] or [100],within 5°
Density 4.5g/cm3
Reflective Index 1.82
Thermal Expansion Coefficient 7.8x10-6 /K
Thermal Conductivity (W/m/K) 14, 20°C / 10.5, 100°C
Mohs hardness 8.5
Stimulated Emission Cross Section 2.8x10-19 cm-2
Relaxation Time of Terminal Lasing Level 30 ns
Radiative Lifetime 550 us
Spontaneous Fluorescence 230 us
Linewidth 0.6 nm
Loss Coefficient 0.003 cm-1 @ 1064nm

Technical Parameters

Dopant concentration Nd: 0.1~2.0at%
Rod sizes Diameter 1~35 mm, Length 0.3~230 mm    Customized
Dimensional tolerances Diameter +0.00/-0.03mm, Length ±0.5mm
Barrel finish Ground Finish with 400# Grit or polished
parallelism ≤ 10"
perpendicularity ≤ 3′
flatness ≤ λ/10 @632.8nm
Surface quality 10-5(MIL-O-13830A)
Chamfer 0.1±0.05mm
AR coating reflectivity ≤ 0.2% (@1064nm)
HR coating reflectivity >99.5% (@1064nm)
PR coating reflectivity 95~99±0.5% (@1064nm)
  1. Some casual size in industry area  :5*85mm,6*105mm,6*120mm,7*105mm,7*110mm,7*145mm etc.
  2. Or you can customize other size (it is better that you can send me the drawings )
  3. You can customize the coatings on the two end faces.

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