What are the advantages and disadvantages of Nd:YAG crystal?

The Nd:YAG crystal laser, with a wavelength of 1064nm, possesses several advantages: low pump threshold, high efficiency, low loss, high beam quality, excellent thermal conductivity, stable chemical and mechanical properties. It finds extensive applications in laser beauty instruments, laser medicine, optical communication, radar and ranging, medical fields, among others.

Nd:YAG Crystal application for laser cosmetic medicine and laser measures | Laser Crystals

Q: What is a Nd:YAG Crystal used for?

Nd:YAG crystal, short for Neodymium-doped Yttrium Aluminum Garnet crystal, is a type of solid-state laser gain medium commonly used in various laser applications. Nd:YAG crystal find extensive use in laser medical procedures , such as laser surgery and dermatology. They are employed for procedures like eye surgeries (e.g., LASIK), treating skin conditions (e.g., tattoo removal, hair removal), and various other surgical interventions due to their ability to precisely target tissues. Dental Procedures: Nd:YAG lasers are utilized in dentistry for tasks such as cavity preparation, gum contouring, and soft tissue surgeries. They offer advantages like reduced bleeding, less pain, and faster healing times compared to traditional dental techniques.

Crystals Materials

Nd:YAG Crystals application for laser cosmetic medicine and laser measures

Size: Upon customer request

Nd³⁺ Concentration: 0.1- 2.5(+/-0.1)atm%

Length: 3 ~ 150mm

Surface Quality: 10/5 Scratch/Dig MIL-O-1380A

Parallelism: < 10″

Perpendicularity: < 5'

Clear Aperture: > 90%

Surface Flatness: < λ/10 @ 632.8 nm

Coating: AR/HR/PR coating upon customer's request

Quality Warranty Period: One year

Key Words: Laser Crystals , Laser Rods , Nd:YAG Crystals , YAG Rods

Nd:YAG crystal is the most widely used solid state laser crystal. Nd:YAG laser crystal are wildly used in all types of solid-state laser systems-frequency-doubled continuous wave, high-energy Q-switched, and so forth. Its good fluorescent lifetime thermal conductivity and physical strengths makes it suitable for high power lamp pumped laser.

Nd:YAG crystal are widely employed in laser medical surgery, such as laser surgery and dermatology. Nd:YAG crystal are employed for procedures like eye surgeries (e.g., LASIK), treating skin conditions (e.g., tattoo removal, hair removal), and various other dental surgical due to high gain, low threshold, high efficiency.

Specifications of Nd:YAG Crystal

Material	Nd³⁺:Y₃Al₅O₁₂
Doping	0.1 ~ 2.5atm%
Size	3 mm ~ 150 mm or Upon customer request
Dimension Tolerances	±0.05 mm
Surface Quality	10/5 S/D
Parallelism	< 10 arcsec
Perpendicularity	< 5 arcmin
Clear Aperture	> 90%
Wavefront Distortion	λ/10 @ 633 nm
Surface Flatness	< λ/10 @ 632.8 nm
Chamfer	< 0.1 mm @ 45°
Coating	AR/HR/PR coating upon customer's request
Damage Threshold	750mW/cm2 at 1064 nm, TEM00, 10 ns, 10Hz

Physical and chemical properties

Chemical Formula	Nd³⁺:Y₃Al₅O₁₂
Crystal Structure	Cubic
Lattice Constant	12.01Å
Density	4.5g/cm³
Melting Point	1970°C
Thermal Conductivity (W/m/k@25°C)	0.14 W
Specific Heat/(J/g/K)	0.59
Rupture Stress	1.3-2.6*10³ kg/cm²
Mohs Hardness	8.5
Young's Modulus/GPa	317
Shear Modulus/Gpa	54.66
Extinction Ratio	25 dB
Poisson Ratio	0.25

Optical properties

Laser Transition	⁴F_3/2 →> ⁴I_11/2
Photon Energy	1.86 x 10^-19J
Laser Transition Wavelength, λl	1064 nm
Pump Transition Wavelength, λp	808 nm
Pump Transition Bandwidth, Δλp	< 4 nm
Laser Transition Bandwidth, Δλl	~0.6 nm
Pump Transition Peak Cross Section, σp(E-20 cm2)	6.7
Laser Transition Peak Cross Section, σl(E-20 cm2)	28
Upper Laser Manifold Lifetime, τ(msec)	0.26
Quantum Defect Fraction	0.24
Fractional Heat Generation	0.37
Refractive Index	1.8197 @1.064 µm
Fluorescence Lifetime	230 µs

nd-yag-crystal-absorption-and-emission — Nd³⁺:YAG Laser Crystals Absorption and Emission

Stock specification list

If need other specifications and quantities products, please contact us(sales@aogcrystal.com).

Part Number	Face size	Length	Doping, atm.%	Coating
Nd-YAG-001	Φ3.0 mm	60.0 mm	0.8	AR/AR@1064 nm
Nd-YAG-002	Φ9.0 mm	150.0 mm	0.8	AR/AR@1064 nm
Nd-YAG-003	3.0*3.0 mm	2.0 mm	1.1	HR@1064 nm + HT@808 nm/AR@1064 nm
Nd-YAG-004	3.0*3.0 mm	5.0 mm	1.1	HR@1064 nm + HT@808 nm/AR@1064 nm

Notes

Anti-reflection coatings are available at your specified wavelength.

Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.

To inquiry or order a finished Nd:YAG laser rod, please specify the specification listed above, for common application, we only need to know the main specification: Nd-dopant concentration, sizes, and coating. For special request, please specify specification in details for evaluation and fabrication.

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