S-KTP

parallel to the crystallographic axes a, b, and c, respectively.

◆ Large nonlinear optical coefficient
◆ Wide angular bandwidth and small walk-off angle
◆ Broad temperature and spectral bandwidth
◆ High thermal conductivity

Physical and Optical Properties:
Please view NLO crysals Properities

Linear Optical Properties:

Transmitting range:	350 nm - 4500 nm
Refractive indices: 1064nm 532nm	n x n y n z 1.7377 1.7453 1.8297 1.7780 1.7886 1.8887
Sellmeier equations: (l in mm)	n x 2 =3.0065+0.03901/( l 2 -0.04251)-0.01327 l 2 n y 2 =3.0333+0.04154/( l 2 -0.04547)-0.01408 l 2 n z 2 =3.0065+0.05694/( l 2 -0.05658)-0.01682 l 2
Therm-optic coefficients:	dn x /dT=1.1x10 -5 /° C, dn y /dT=1.3x10 -5 /° C, dn z /dT=1.6x10 -5 /° C
Absorption coefficient:	a < 1% cm -1 @1064nm and 532nm

Nonlinear Optical Properties:

Phase match SHG range:	497 - 1800nm
Nonlinear optical coefficients:	d 31 =6.5pm/v, d 32 =5pm/v, d 33 =13.7pm/v, d 24 =7.6pm/v, d 15 =6.1pm/v
Effective nonlinearity expressions	d eff (II)» (d 24 - d 15 )sin2fsin2q - (d 15 sin 2 f + d 24 cos 2 f)sinq4SPAN lang=EN-US style="FONT-SIZE: 9pt; mso-bidi-font-size: 10.0pt">
For type II SHG of a Nd:YAG Laser at 1064nm:	PM angle: θ=90°, φ=23.5°: d eff »8.3xd 36 (KDP), angular acceptance: 20 mrad-cm, spectral acceptance: 5.6 Å –cm, walk-off angle: 4.5 mrad, Laser damage threshold: > 450MW/cm², (@ 1064nm, 10ns, 10Hz)
Electro-optic coefficients:	Low frequency (pm/V)	High frequency (pm/V)
r 13	9.5	8.8
r 23	15.7	13.8
r 33	36.3	35.0
r 51	7.3	6.9
r 42	9.3	8.8
Dielectric constant:	e eff =13

KTP for SHG of Nd:lasers
KTP is the most commonly used material for frequency doubling of Nd:YAG lasers and other Nd-doped lasers, particularly at the low or medium power density.

KTP for OPO
As an efficient OPO crystal pumped by the fundamental and second harmonics of a Nd:YAG or Nd:YLF laser, KTP plays an important role in parametric sources for tunable output from visible (0.6mm) to mid-IR (4.5mm). NCPM KTP OPO pumped by 1064nm, the signal output is around eye safe wavelength, find applications in eye-safe devices. The NCPM KTP OPO keeps the KTP crystal fixed in X-axis and tunes the pumping wavelength. If 1064nm pumping source, the output will be at 1.57mm (signal) and 3.3 mm (idler).

Specifications:

Dimension tolerance	± 0.1 mm
Wavefront distortion:	l /8 @ 633 nm
Clear aperture:	> 90% central area
Flatness:	l /8 @ 633 nm
S/D:	10/5 to MIL-O-13830A
Parallelism:	better than 20 arc seconds
Perpendicularity:	12 arc minutes
Angle tolerance:	Dq < ±0.2°, Dj < ± 0.2°
AR coating:	R< 0.1% at 1064nm and R<0.4% at 532 nm.
Optical damage threshold	500MW/cm 2 , (@ 1.064mm, 10ns, 10Hz)