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Potassium Titanyl Phosphate (KTiOPO4 or KTP) is a positive biaxial crystal, with the principal axes X, Y, and Z (nz>ny>nx) parallel to the crystallographic axes a, b, and c, respectively. It is a nonlinear crystal mostly used in extracavity configuration when a single pass through the crystal is required. KTP has large nonlinear coefficient and its effective nonlinear optical coefficient deff at 1064nm is more than 1.5 times that of BBO. Also, its damage threshold is near 1 GW/cm2 for 1 Hz 10 ns pulses at 1064nm.

KTP crystals from Photonchina are optimized for SHG intracavity configuration in low peak power CW lasers and are ideal choice in the visible to infrared spectral region with relatively low cost. They are widely seen in both commercial and military lasers including laboratory and medical system, range-finders, LiDAR, optical communication and industrial systems.

KTP features,

• Large nonlinear optical coefficients

• Wide angular bandwidth and small walk-off angle

• Broad temperature and spectral bandwidth

• Nonhydroscopic, chemically and mechanically stable

• High thermal conductivity

• Flux grown, extremely low cost compared to KTA, BBO and LBO

• High damage threshold, low absorption

• Production capacity to support industrial customers

• High performance optical coating, mounting service

Applications of Photonchina’s KTP:

In short, KTP mainly has the following usage,

 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 0.6mm-4.5mm Tunable Output

 Electrical Optical(E-O) Modulators, Optical Switches, and Directional Couplers

 Optical Waveguides for Integrated NLO and E-O Devices

Specifications of Photonchina KTP products：

        •     Standard size:  6x6x5mm；9x9x5mm；5x5x20mm,with the maximum length of 60mm.

        •    Clear aperture: ≥90%

        •    No visible scattering paths or centers when inspected by a 50mW green laser

        •    Flatness: less than λ/8 @ 633nm

        •    Transmitting wavefront distortion: < λ/8 @ 633nm

        •    Chamfer: ≤0.2mm@45®

        •    Chip:≤0.1mm

        •    Scratch/Dig code: 10-5，MIL-PRF-13830B

        •    Parallelism: >20 arc seconds

        •    Perpendicularity: ≤5 arc minutes

        •    Angle tolerance: △θ≤0.25®, △ф≤0.25®

        •    Damage threshold [GW/cm2 ]：

>0.5 for 1064nm, TEM00, 10ns, 10HZ (AR-coated)

>0.3 for 532nm, TEM00, 10ns, 10HZ (AR-coated)

• AR coating: R< 0.2% at 1064nm and R<1.0% at 532nm;

• HR@1570(R>99.8%)&HT@1064(T>99.5%)

• HR@1064(R>99.8%)&PR@1570(R=50,60,70%+/-2%)

Ordering Information in Photonchina:

P/N Type Size(mm) Optical Coating

WP-KTP663 SHG 6x6x3 AR1064&532

WP-KTP665 SHG 6x6x5 AR1064&532

WP-KTP775 SHG 7x7x5 AR1064&532

WP-KTP885 SHG 8x8x5 AR1064&532

WP-KTP995 SHG 9x9x5 AR1064&532

WP-KTP15156 SHG 15x15x6 AR1064&532

WP-KTP4420 OPO 4x4x20 AR1570&1064

WP-KTP6620 OPO 6x6x20 AR1570&1064

WP-KTP7720 OPO 7x7x20 AR1570&1064

WP-KTP4416 OPO 4x4x16 HR1570,HT1064|HR1064,PR1570

WP-KTP5520 OPO 5x5x20 HR1570,HT1064|HR1064,PR1570