KTA

KTA crystal, is an excellent nonlinear optical crystal for Optical Parametric Oscillation (OPO) Application. OPO devices based on KTAs are reliable, solid state sources of tunable laser radiation exhibiting energy conversion efficiencies above 50%. In addition KTA has a very high damage threshold.

In comparison to KTP, KTA crystals feature large non-linear optical and electro-optical coefficients and have significantly reduced absorption in the 2.0 - 5.0 m range. Its low dielectric constants, low loss tangent and ionic conductivities are orders of magnitude less than that of KTP.
 

Advantage:

 
Large nonlinear optical and electro-optical coefficients
Wide angular bandwidth and small walk-off angle
Broad temperature and spectral bandwidth
Low dielectric constants, loss tangent and ionic conductivities (much less than that of KTP)
High damage threshold
Lower absorption and high transmission in the 3-4 µm spectrum range than KTP.
Highly resistant to high intensity laser radiation
 

Specification of KTA

Dimension Tolerance
(W±0.1mm) x (H±0.1mm) x (L+0.2/-0.1 mm) (L≥2mm)
(W±0.1mm) x (H±0.1mm) x (L±0.1 mm) (L<2mm)
Absorption
<0.01%@1064nm, <1%@532nm
Cutting Angle Tolerance
Dq< ±0.2°, Df< ±0.2°
Wavefront Distortion
<λ/8 @632.8 nm
Chamfer
≤ 0.15 mm x 45°
Perpendicularity
< 5 arc minutes
Parallelism
< 20 arc seconds
Flatness
<λ/10 @633 nm
Scratch/Dig 
10/5 per MIL-PRF-13830B
Clear Aperture
> Central 90%
Antireflection Coating
R < 0.2% @1064nm, R < 0.5% @532nm

Application: OPO 1064nm

Part No
W
H
L
θ
φ
Coating
KTP-4420O1
4
4
20
90
0
AR/AR1064&1570nm
KTP-5515O1
5
5
15
90
0
AR/AR1064&1570nm
KTP-5520O1
5
5
20
90
0
AR/AR1064&1570nm
KTP-6620O1
6
6
20
90
0
AR/AR1064&1570nm
KTP-7720O1
7
7
20
90
0
AR/AR1064&1570nm
KTP-8820O1
8
8
20
90
0
AR/AR1064&1570nm