CY0492 Potassium Titanyl Phosphate (KTP)

Catalog No.	CY0492
Dimensions	1x1x0.05 - 30x30x40 mm

Potassium Titanyl Phosphate (KTiOPO4, KTP) is a famous laser crystal that can be widely used in medical, such as dental (hard tissues), orthopedics, etc. Stanford Advanced Materials (SAM) is a trusted supplier and manufacturer of Potassium Titanyl Phosphate (KTP) products.

Related products: Nd:YAG, Er:YAG, Ho:Cr:Tm:YAG.

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CY0492 Potassium Titanyl Phosphate (KTP)

Description

Specification

Potassium Titanyl Phosphate (KTP) Description

Potassium Titanyl Phosphate (KTiOPO4), also known as KTP Crystal, is a nonlinear optical material widely used in various optical devices. It is a transparent and colorless crystal that exhibits excellent properties for optical frequency conversion, electro-optic modulation, and wave mixing. KTP crystal is highly efficient for second harmonic generation (SHG), where it doubles the frequency of an input beam of light.

Potassium Titanyl Phosphate (KTP) Specifications

STANDARD SPECIFICATIONS

Flatness	λ/8 @ 633 nm
Parallelism	< 20 arcsec
Perpendicularity	< 5 arcmin
Angle tolerance	< 30 arcmin
Aperture tolerance	± 0.1 mm
Surface quality	10/5 scratch & dig per MIL-O-13830A
Clear aperture	90% of full aperture

PHYSICAL PROPERTIES

Crystal structure	orthorhombic
Point group	mm2
Space group	Pna21
Lattice constants, Å	a = 6.404, b = 10.616, c = 12.814, z = 8
Density, g/cm3	3.01
Melting point, °C	1172
Transition temperature, °C	936
Mohs hardness	5
Thermal expansion coefficients, °C-1	ax = 11×10-6, ay = 9×10-6, az = 0.6×10-6
Thermal conductivity, W/m*K	13
Not hygroscopic

OPTICAL PROPERTIES

Transparency	350–4400 nm
Refractive indices	at 1064 nm	at 532 nm
	nx = 1.7404	nx = 1.7797
Thermooptic coefficients in 0.4 – 1.0 μm range	ny = 1.7479	ny = 1.7897
	nz = 1.8296	nz = 1.8877
	∂nx/∂T = 1.1×10-5 (K)-1
	∂ny/∂T = 1.3×10-5 (K)-1
	∂nz/∂T = 1.6×10-5 (K)-1
Wavelength dispersion of refractive indices	nx2=3.0067+0.0395/(λ2-0.04251)-0.01247*λ2
	ny2=3.0319+0.04152/(λ2-0.04586)-0.01337*λ2
	nz2 =3.3134+0.05694/(λ2-0.05941)-0.016713*λ2

NONLINEAR PROPERTIES

Phase matching range for:
Type 2 SHG in x-y plane	0.99÷1.08 μm
Type 2 SHG in x-z plane	1.1÷3.4 μm
Type 2, SHG@1064 nm, cut angle θ=90°, φ=23.5°
Walk-off	4 mrad
Angular acceptances	Δθ = 55 mrad * cm
Δφ = 10 mrad * cm
Thermal acceptance	ΔT = 22 K * cm
Spectral acceptance	Δν = 0.56 nm * cm
Up to 80% extracavity SHG efficiency
Effective nonlinearity
x-y plane	deoe = doee = d15sin2φ + d24cos2φ
x-z plane	doeo = deoo = d24sinθ
	d31= ± 1.95 pm/V d32=± 3.9 pm/V
	d33= ± 15.3 pm/V d24= d32 d15= d31
Damage threshold	>500 MW/cm2
	for pulses λ=1064 nm, τ=10 ns, 10 Hz, TEM00

Notes:

1. To inquire or order a finished crystal, please provide specifications as listed above. For most applications, we only need to know the following:

1) Nd-dopant concentration; 2) Sizes; 3) Surface quality; 4) Coating.

2. For special requests, please provide a detailed specification for evaluation and fabrication.

Potassium Titanyl Phosphate (KTP) Applications

KTP Crystal is ideal for applications like frequency doubling of lasers, producing green light from infrared lasers, and generating ultraviolet light. KTP crystal is also used in optical parametric oscillators and optical switches, as well as in biomedical and telecommunications industries.

Potassium Titanyl Phosphate (KTP) Packing

Potassium Titanyl Phosphate (KTP) are securely packaged in moisture-resistant, anti-static, and shock-absorbing materials. Custom packaging options, such as cleanroom packaging, are also available for sensitive applications.

Potassium Titanyl Phosphate (KTP) FAQs

Q1 What makes KTP ideal for frequency doubling?

KTP is ideal for frequency doubling due to:

Its high nonlinear optical coefficient, enabling efficient conversion of fundamental wavelengths.
Broad phase-matching angles, allowing flexibility in laser design.
High thermal stability, making it suitable for continuous-wave (CW) and high-power pulsed lasers.

Q2 Can KTP be used for other nonlinear optical processes?

Yes, KTP is versatile and can be used for:

Sum-Frequency Generation (SFG): Combining two wavelengths into a higher frequency.
Difference-Frequency Generation (DFG): Producing a lower frequency from two higher frequencies.
Optical Parametric Oscillation (OPO): Generating tunable wavelengths in the mid-infrared range.

Q3 What is the difference between KTP and BBO crystals?

While both KTP and BBO are nonlinear optical crystals, they differ in properties:

KTP: Higher optical nonlinearity, easier phase matching, and higher damage threshold, ideal for mid-to-high-power applications.
BBO: Broader transparency range, higher UV transmission, and suitability for ultrafast laser systems.