Advantages:
- large nonlinear optical
coefficient
- wide angular bandwidth and
small walk-off angle
- broad temperature and
spectral bandwidth
- high electro-optic
coefficient and low dielectric constant
- large figure of merit
- nonhydroscopic, chemically
and mechanically stable
Applications:
- frequency doubling (SHG) of
Nd-doped lasers for green/red output.
- frequency mixing (SFM) of Nd
laser and diode laser for blue output.
- parametric sources (OPG, OPA
and OPO) for 600nm-4500nm tunable output.
- E-O modulators, optical
switches, directional couplers.
- optical waveguides for
integrated NLO and E-O devices.
Using advanced technique in
crystal growth, 35x55x68mm3 transparent KTP boule with
flux method has been grown. As large as 15x15x20mm3
KTP devices are fabricated.
We provide KTP with:
- strict quality control on
optical homogeneity, transmission and scattering
- quick delivery
- unbeatable price and quantity
discount
- technical support
- AR-coating, mounting and
re-polishing service
Structural and
Physical Properties:
|
Crystal
structure |
Orthorhombic,
space group Pna21,point group mm2 |
|
Cell
parameters |
a=6.404
Angstrom, b=10.616 Angstrom, c=12.814 Angstrom, Z=8 |
|
Melting
point |
1172�
C incongruent |
|
Curie
point |
936�
C |
|
Mohs
hardness |
� 5 |
|
Density |
3.01
g/cm3 |
|
Color |
colorless |
|
Hygroscopic
susceptibility |
no |
|
Specific
heat |
0.1643
cal/g�C |
|
Thermal
conductivity |
0.13
W/cm/�K |
|
Electrical
conductivity |
3.5x10-8
s/cm (c-axis, 22� C, 1KHz) |
Nonlinear Optical Properties:
|
Phase
matchable SHG range:
|
497
- 1800nm
|
|
Nonlinear
optical coefficients:
|
d31=6.5pm/v,
d32=5pm/v, d33=13.7pm/v, d24=7.6pm/v,
d15=6.1pm/v deff(II) � (d24
- d15)sin2f sin2q - (d15sin2f + d24cos2f )sinq
|
|
For
type II SHG of a Nd:YAG laser at 1064nm:
|
PM
angle: q =90� , j
=23.3� Effective
SHG coefficient: deff � 8.3xd36(KDP)
Angular acceptance: 20
mrad-cm
Temperature acceptance:
25� C-cm
Spectral acceptance: 5.6
Angstrom -cm
Walk-off angle: 4.5 mrad
(0.26� )
Damage threshold:
>450MW/cm2 @1064nm, 10ns, 10Hz
|
|
Electro-optic
coefficients:
r13
r23
r33
r51
r42
|
Low
frequency (pm/V) High frequency (pm/V)
9.5 8.8
15.7 13.8
36.3 35.0
7.3 6.9
9.3 8.8
|
|
Dielectric
constant:
|
eeff=13
|
Optical
Properties:
|
Transmitting
range:
|
350
nm - 4500 nm
|
|
Refractive
indices: 1064nm
532nm
|
nx
ny nz
1.7377 1.7453 1.8297
1.7780 1.7886 1.8887
|
|
Therm-optic
coefficients:
|
dnx/dT=1.1x10-5/�
C, dny/dT=1.3x10-5/� C, dnz/dT=1.6x10-5/�
C
|
|
Absorption
|
a < 1% cm-1
@1064nm and 532nm
|
| |
|
Applications
for SHG and SFG 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.
To date, extra- and intra-cavity frequency doubled Nd:lasers
using KTP have become a preferred source of pumping visible dye
lasers and tunable Ti:Sapphire lasers as well as their
amplifiers. Applied to diode-pumped Nd:laser, KTP has provided
the basis for the construction of compact visible solid state
laser systems.
Recent advances in
intracavity-doubled Nd:YAG and Nd:YVO4 lasers, have increased the
demand for compact green lasers used in optical disk and laser
printer. Over 100mW and 76mW TEM00 green outputs are available
from LD pumped Nd:YAG and Nd:YVO4 lasers, respectively. Moreover,
2.5mW green light has derived from 50mW LD pumped and intracavity
doubled Nd:YVO4 mini-lasers with a 9mm long cavity.
KTP has also shown its powerful
applications in extracavity SHG with conversion efficiency
exceeding 60%. The applications of KTP for intracavity mixing of
810nm diode and 1064nm Nd:YAG laser to generate blue light and
intracavity SHG of Nd:YAG or Nd:YAP lasers at 1300nm to produce
red light are also in progress.
Applications
for OPG, OPA and OPO
As an efficient OPO crystal pumped
by a Nd:laser and its second harmonics, KTP plays an important
role for parametric sources for tunable output from visible
(600nm) to mid-IR (4500nm). KTP's OPO results in stable,
continuous outputs of femtosecond pulse of 108 Hz repetition rate
and miliwatt average power levels in both signal and idler
output. KTP's OPO pumped by a 1064nm Nd:YAG laser has generated
above 66% efficiency for degenerately converting to 2120nm.
KTP
Specifications
- Transmitting wavefront
distortion: less than l /4 @ 633 nm
- Dimension tolerance: (W �
0.1 mm) x (H � 0.1mm) x (L + 0.2 mm/-0.1mm)
- Clear aperture: > 90%
central area
- Flatness: l /8 @ 633 nm
- Scratch/Dig code: 10/5 to
MIL-O-13830A
- Parallelism: better than 20
arc seconds
- Perpendicularity: 5 arc
minutes
- Angle tolerance: D q < �
0.5� , D f < � 0.5�
- AR coating: R< 0.2% at
1064nm and R<1.0% at 532 nm.
Quality Warranty Period: one
year under proper use.
 Nd:YAG rod
Nd:YVO4
KTA
(Nd, Ce):YAG
Yb:YAG
Cr4+:YAG
KTP
LBO
BBO
|
|
