What documentation is available for LGS (LiGaS2) Nonlinear Crystal for Mid-IR OPO and OPA, 0.32–11.6 µm?

The following documents are available for download on the LGS (LiGaS2) Nonlinear Crystal for Mid-IR OPO and OPA, 0.32–11.6 µm product page: Spec sheet.Visit the Documents tab for direct download links.

Is LGS (LiGaS2) Nonlinear Crystal for Mid-IR OPO and OPA, 0.32–11.6 µm available for purchase?

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LGS (LiGaS2) Nonlinear Crystal for Mid-IR OPO and OPA, 0.32–11.6 µm

Name: LGS (LiGaS2) Nonlinear Crystal for Mid-IR OPO and OPA, 0.32–11.6 µm
Brand: WaveQuanta
SKU: WQ-NLC-LGS

WQ-NLC-LGS

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Lasers & Sources Mirrors Nonlinear Crystals Optomechanics

RoHS REACH

LGS (LiGaS2) is an orthorhombic mid-infrared nonlinear crystal with a wide band gap, low two-photon absorption, small group-velocity mismatch, high thermal conductivity and low thermal expansion. Its UV cut-off near 320 nm allows pumping with visible and all-solid-state near-IR lasers, and mid-IR sources based on LGS have reached tuning ranges covering 3.0–11.5 µm. It is used for OPO, OPA, DFG and SHG.

Key Features

Effective transmission range 0.32–11.6 µm
UV cut-off at about 320 nm, allowing pumping by visible and near-IR solid-state lasers
Damage threshold over 50 GW/cm² at 1030 nm, 300 fs
Thermal conductivity 6–8 W/(m·K)
Low thermal expansion: αa ≈ 1.5 × 10⁻⁶ /K, αc ≈ 2.0 × 10⁻⁶ /K
Low two-photon absorption and small group-velocity mismatch
Mid-IR output tunable over 3.0–11.5 µm has been demonstrated

Typical Applications

Mid-IR optical parametric oscillators (OPO)
Optical parametric amplifiers (OPA)
Difference-frequency generation (DFG)
Second-harmonic generation (SHG)

Related Products

BGS Crystal — wide transparency
AGS Crystal — mid-IR DFG
AGGS Crystal — 1 µm-pumped mid-IR

Browse all: Mid-IR Nonlinear Crystals · Nonlinear Crystals

Model: WQ-NLC-LGS · Custom sizes, orientations and coatings on request — contact WaveQuanta for a quote and lead time.

Chemical Formula	LiGaS2
Crystal System	Orthorhombic
Point Group	mm2
Lattice Constants	a = 6.513 Å, b = 7.863 Å, c = 6.218 Å
Effective Transmission Range	0.32–11.6 µm
UV Cut-off Wavelength	≈320 nm
Nonlinear Coefficients	d31 ≈ 5.8 pm/V, d24 ≈ 5.1 pm/V, d33 ≈ −10.7 pm/V
Thermal Conductivity	6–8 W/(m·K)
Thermal Expansion Coefficients	αa ≈ 1.5 × 10⁻⁶ /K, αc ≈ 2.0 × 10⁻⁶ /K
Damage Threshold	> 50 GW/cm² @ 1030 nm, 300 fs
Demonstrated Tuning Range	3.0–11.5 µm

Specification Sheet PDF — Download

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Product Family: Mid-IR Nonlinear Crystals (11 variants)

Product ▴▾	SKU	Size ▴▾	Clear Aperture ▴▾	Operating Wavelength ▴▾
BGSe (BaGa4Se7) Nonlinear Crystal for Mid-IR, 0.47–18 µm, d11 = 24 pm/V	`WQ-NLC-BGSE`	—	—	—	Contact
HGS (HgGa2S4) Nonlinear Crystal for Mid-IR SHG and OPO, 0.55–13 µm	`WQ-NLC-HGS`	—	—	—	Contact
AGGS (AgGaGeS4) Nonlinear Crystal for 1 µm-Pumped Mid-IR, 0.5–11.5 µm	`WQ-NLC-AGGS`	—	—	—	Contact
BGGSe (BaGa2GeSe6) Nonlinear Crystal for Mid-IR, 0.5–18 µm, d11 = 66 pm/V	`WQ-NLC-BGGSE`	—	—	—	Contact
GaSe (Gallium Selenide) Nonlinear Crystal for Mid-IR SHG and THz, 0.62–20 µm	`WQ-NLC-GASE`	—	—	—	Contact
BGS (BaGa4S7) Mid-IR Nonlinear Crystal for OPO and OPA, 0.35–13.7 µm	`WQ-NLC-BGS`	—	—	—	Contact
LGS (LiGaS2) Nonlinear Crystal for Mid-IR OPO and OPA, 0.32–11.6 µm Current	`WQ-NLC-LGS`	—	—	—
ZGP (ZnGeP2) Nonlinear Crystal for Mid-IR OPO, 0.75–12 µm	`WQ-NLC-ZGP`	—	—	—	Contact
AGS (AgGaS2) Nonlinear Crystal for Mid-IR DFG and OPO, 0.50–13.2 µm	`WQ-NLC-AGS`	—	—	—	Contact
AGSe (AgGaSe2) Nonlinear Crystal for Mid-IR OPO and CO2 SHG, 0.73–18 µm	`WQ-NLC-AGSE`	—	—	—	Contact
AGGSe (AgGaGe5Se12) Nonlinear Crystal for 1 µm-Pumped Mid-IR, 0.63–16 µm	`WQ-NLC-AGGSE`	—	—	—	Contact

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