PRODUCT CENTER

MgO:SLT

Stoichiometric lithium tantalate (s-LT) is emerging as a superior alternative to lithium niobate (LN) for integrated photonic devices, offering twice the photorefractive damage threshold at 532 nm and a broader transparency range (280–5600 nm vs. LN's 320–5200 nm). Its lower absorption edge enables UV applications, while advantages like reduced polarization switching voltage and enhanced thermal conductivity further solidify its potential in advanced optical systems.

Key words:

Lithium Niobate /Tantalate Crystals

Classification:

Lithium Niobate /Tantalate Crystals

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Application

Low defect density (100times lower）

Wide transparent region (UV cut-off 20nm lower)

Large EO and NLO constants (d₃₃ >26.2pm/V)

Small coercive field (<1-2kV/mm)

High photorefractive damage threshold (>5MW/cm²@532nm, cw laser)

High laser damage threshold (>2GW/cm²@1064nm, pulse laser)

There is almost no birefringence index

No GRIIRA (Green Induced IR Absorpution）

Preperties of Stoichiometric LiTao₃

Properties		(Stoichiometric】 LiTaO₃ (SLT)1	【Congruent】 LiTaO₃ (CLT)
Absorption edge	(nm)	270
Refractive index³	n_o(nm)	2.1770(@633nm)
Refractive index³	ne(nm)	2.1745(@633nm)
Birefringence	ne-n_o(nm)	-0.0025(@633nm)
Linear EO constants	r31(pm/V)	8.4(@633nm)
Linear EO constants	r33(pm/V)	30.5(@633nm)
E-field for domain switch (coercive field)	Ec(kV/mm)	<1.7	approx.1/13 of CLT
Thermal conductivity	W/(m ·K)	8.78	approx.2 times CLT
Thermal conductivity	W/(m ·K)	8.43(MgO-doped)	approx.2 times CLT
Photorefractive damage threshold	MW/cm²@532nm	2	approx.200 times CLT
GRIIR A9	ppm/cm	<100	<1/3 of CLT
	@3.6kW/cm²CW	~50(MgO-doped)
	Green	~50(MgO-doped)

PRODUCT CENTER

MgO:SLT

Application

Preperties of Stoichiometric LiTao3

Preperties of Stoichiometric LiTao₃