What documentation is available for HGS (HgGa2S4) Nonlinear Crystal for Mid-IR SHG and OPO, 0.55–13 µm?

The following documents are available for download on the HGS (HgGa2S4) Nonlinear Crystal for Mid-IR SHG and OPO, 0.55–13 µm product page: Spec sheet.Visit the Documents tab for direct download links.

Is HGS (HgGa2S4) Nonlinear Crystal for Mid-IR SHG and OPO, 0.55–13 µm available for purchase?

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HGS (HgGa2S4) Nonlinear Crystal for Mid-IR SHG and OPO, 0.55–13 µm

Name: HGS (HgGa2S4) Nonlinear Crystal for Mid-IR SHG and OPO, 0.55–13 µm
Brand: WaveQuanta
SKU: WQ-NLC-HGS

WQ-NLC-HGS

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HGS (mercury thiogallate, HgGa2S4) is a negative uniaxial nonlinear crystal transparent from 0.55 to 13 µm. Its laser damage threshold and conversion efficiency support frequency doubling and OPO/OPA operation across 1.0–10 µm; a 4 mm long element has shown about 10% SHG efficiency for CO2 laser radiation (30 ns pulses, 60 MW/cm²). Large HGS crystals are difficult to grow, so available apertures are confirmed at the time of quotation.

Key Features

Transparency range 0.55–13.00 µm
Negative uniaxial crystal (no > ne)
Energy gap 2.34 eV
About 10% CO2 laser SHG efficiency in a 4 mm long element (30 ns, 60 MW/cm²)
Suitable for frequency doubling and OPO/OPA in the 1.0–10 µm range
Mohs hardness 3–3.5; density 4.95 g/cm³

Typical Applications

Second harmonic generation of CO and CO2 lasers
Optical parametric oscillators and amplifiers in the 1.0–10 µm range
Difference-frequency generation into the mid-IR
Frequency mixing in the mid-IR

Related Products

AGS Crystal — mid-IR DFG
LGS Crystal — 1 µm-pumped OPO
ZGP Crystal — high-power mid-IR

Browse all: Mid-IR Nonlinear Crystals · Nonlinear Crystals

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

Chemical Formula	HgGa2S4
Optical Class	Negative uniaxial (no > ne)
Transparency Range	0.55–13.00 µm
Energy Gap	2.34 eV
Mohs Hardness	3–3.5
Density	4.95 g/cm³
Operating Range (SHG, OPO/OPA)	1.0–10 µm
CO2 Laser SHG Efficiency	About 10% (4 mm length, 30 ns pulses, 60 MW/cm²)

Specification Sheet PDF — Download

No CAD drawings available for this product.

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 Current	`WQ-NLC-HGS`	—	—	—
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	`WQ-NLC-LGS`	—	—	—	Contact
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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