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KTP
- 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
PRODUCT DESCRIPTION
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, 35x55x68mm3transparent KTP boule with flux method has been grown. As large as 15x15x20mm3KTP 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 |
3.5x10-8s/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 |
nxnynz 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 nmDimension 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. |