Kaston Optronics Manufacturing Ltd.

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Potassium Titanyl Phosphate ( KTP ) Crystal

Advantages

u Large Nonlinear Optical (NLO) Coefficients
u Wide Angular Bandwidth and Small Walk-off Angle
u Broad Temperature and Spectral Bandwidth
u High Electro-Optic (E-O) Coefficient and Low Dielectric Constant
u Large Figure of Merit for an Optical Waveguide Modulator
u Nonhygroscopic, Good Chemical and Mechanical Properties

Applications

u Frequency Doubling (SHG) of Nd-doped Lasers for Green/Red Output.
u Frequency Mixing (SFM) of Nd Laser and Diode Laser for Blue Output.
u Parametric Sources (OPG, OPA and OPO) for 0.6mm-4.5mm Tunable Output.
u E-O Modulators, Optical Switches, Directional Couplers.
u Optical Waveguides for Integrated NLO and E-O Devices.

KASTON provides:

u Standard size of KTP crystal for DPSS application;
u Strict Quality Control;
u 1 - 2 Weeks Delivery;
u Unbeatable Price and Special OEM Discount;
u Free Technical Support;
u AR-Coating, Mounting and Re-polishing Service;
u Mass Production to Support Industrial and Commercial Applications;
u Precision Oven & Temperature Controller for Heating KTP.

With KASTON's advanced crystal growing technique 45x62x85mm³ transparent KTP boules have been grown with flux method. As large as 25x25x30 mm³ KTP devices are fabricated . The mass production line with well organized Quality Assurance system for KTP makes us a reliable supplier to not only R&D customers but also industrial and commercial users.

Basic Properties

1. Structural and Physical Properties

Crystal Structure	Orthorhombic,point group mm²
Cell Parameters	a = 6.404Å,b = 10.616Å, c = 12.814Å, Z = 8
Melting Point	1172^oC Incongruent
Curie point	936^oC
Mohs Hardness	≈5.0
Density	3.01 g/cm³
Linear Absorption Coefficients	a<0.001 cm^-1 @ l =1064 nm or 532 nm
Hygroscopic Susceptibility	no
Relative Dielectric Constant	e_eff=13
Specific heat	0.1643 cal/g·^oC
Electrical conductivity	3.5 x 10^-8s/cm (c-axis,22^oC,1KHz)
Thermal Conductivity	13 W/m/K

2. Linear Optical Properties

Transparency Range: 350 - 4500 nm, See Transparency Curve	KTP Transparency Curve
Refractive Indices: at 1064 nm n_x = 1.7377, n_y = 1.7453, n_z = 1.8297 at 532 nm n_x = 1.7780, n_y = 1.7886, n_z = 1.8887
Therm-Optic Coefficients: dn_x/dT = 1.1 x 10^-5/^oC dn_y/dT = 1.3 x 10^-5/^oC dn_z/dT = 1.6 x 10^-5/^oC
Sellmeier Equations: N²_x = 3.0065+0.03901/(l²-0.04251) -0.01327l² N²_y = 3.0333+0.04154/(l²-0.04547) -0.01408l² N²_z = 3.3134+0.05694/(l²-0.05658) -0.01682l²

3. Nonlinear Optical Properties

Phase-Matchable Output Range:	492- 1700 nm
NLO Coefficients: d₃₁=2.54pm/V, d₃₂=4.35pm/V, d₃₃=16.9pm/V d₂₄=3.64pm/V, d₁₅=1.91pm/V at 1064 nm d_eff(II)» (d₂₄ - d₁₅)sin2fsin2q - (d₁₅sin²f + d₂₄cos²f)sinq
Electro-Optic Coefficients:	Low Frequency (pm/V)	High Frequency(pm/V)
g₁₃	9.5	8.8
g₂₃	15.7	13.8
g₃₃	36.3	35.0
g₅₁	7.3	6.9
g₄₂	9.3	8.8