Products / Laser Crystal

Nd:YAP
　　YAlO3 perovskite (YAP) is a well known host for solid state lasers. The crystal anisotropy of YAP offers numerous advantages.It permits a small tuning of wavelength by varyingthe wave vector direction in the crystal. Furthermore, the output beam is linearly polarised.

1.Main Specifications: 

 Dopant Level:

 Nd: 0.7~1.5 at%

 Dimensions:

 +0,00/-0,05mm(diameter)
 ±0.5mm(length)

 Flatness:

 ≤Lambda/10 @632.8nm

 Parallelism:

 ≤15" Arc Second

 Perpendicularity

 ≤5′ Arc Minute

 Surface Quality:

 10/5 Scratch/Dig. (per MIL-O-13830A)

 Wavefront Distortion:

 ≤Lambda/8 @632.8nm

 AR Coating Reflectivity:

 <0.25%@1064nm

Dimensions and coatings available for special customer requirements.

2. Common properties:

 Chemical Formula:

 YAlO3:Nd3+

 Crystal Structure:

 

 Lattice Constant:

 a=5,176, b=5,307, c=7,355

 Refractive Index n:

 na=1,929, nb=1,943, nc=1,952

 dn/dT:

 na:9,7x10-6 K-1
 nc:14,5x10-6 K-1

 Density:

 5,35 g/cm3

 Melting Point:

 1870°C

 Specific Heat:

 400 J/(kg K)

 Thermal Conductivity:

 0,11 W/(cm K)

 Thermal Expansion:

 9,5 x 10-6 K-1 (a axis)
 4,3 x 10-6 K-1 (b axis)
 10,8 x 10-6 K-1 (c axis)

 Knoop Hardness:

 977 (a axis)

  3.Laser characteristics:

 Lasering Wavelength

 Fluorescence Lifetime

 Transitions
 0.93 µm
 180 µs
 4F3/2 ® 4I9/2
 1.06~1.099µm
 180 µs
 4F3/2 ® 4I11/2
 1.34µm
 180 µs
 4F3/2 ® 4I13/2