Nd:YAP is a well-known laser crystal for high output power resonators, and especially suitable for lasers with electro-optic cells or harmonic generators for its polarized output. The 1340nm emission wavelength of Nd:YAP is more advantageous for application in laser medicine than 1319nm emission wavelength of Nd:YAG.

Advantages of Nd:YAP Crystals

Comparable threshold and slope efficiency at 1079nm to Nd:YAG at 1064nm

Higher efficiency at 1340nm compared to Nd:YAG at 1319nm

Linearly polarized output beam

Higher absorption in water and body fluid of 1340nm compared to 1319nm

Specifications

Dopant concentration

Nd: 0.7-0.9 at% for cw and pulse at 1079nm
0.85~0.95 at% for cw at 1340nm
Other dopant concentrations are available upon request.

Orientation

[010] within 5°

Rod sizes

Diameter 2~10mm, Length 20~150mm
Upon request of customer

Dimensional tolerances

Diameter: +0.00/-0.05mm, Length: ± 0.5mm

Barrel finish

Ground and polished

Parallelism

≤ 10"

Perpendicularity

≤ 5′

Flatness

≤ λ/10 @632.8nm

Surface Quality

10-5(MIL-O-13830A)

Chamfer

0.15±0.05mm

AR Coating Reflectivity

≤ 0.25% (@1064nm)

Optical and Spectral Properties

Laser transition

4F3/2→4I9/2 for 930nm

4F3/2→4I11/2 for 1079nm

4F3/2→4I13/2 for 1340nm

Fluorescence lifetime

180μs

Emission cross section

2.4 x 10-19 cm2(1079 nm)
1.22 x 10-19 cm2(1340 nm)

Diode pump band

803 nm for E∥c
807 nm for E∥a

Physical and Chemical Properties

Crystal Structure

Orthorhombic

Lattice Constant

a = 0.518 nm
b = 0.532 nm
c = 0.736 nm

Density

5.35 g/cm3

Mohs Hardness

8.5

Refractive Index n

na=1.91，nb=1.92，nc=1.94

dn/dT

na : 9.7 x 10-6 /K
nc : 14.5 x 10-6/K

Thermal Conductivity

11W/(m·K)

Thermal Expansion

a: 9.5 x 10-6/K
b: 4.2 x 10-6/K
c: 10.8 x 10-6/K

Specific Heat

400 J/(kg K)

Melting Point

1870 °C