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GaSe Crystal
Optical Crystals

GaSe Crystal

Supplier
Dientech
Category
Optical Crystals
Origin
China

Gallium Selenide (GaSe) non-linear optical single crystal, combining a large non-linear coefficient, a high damage threshold and a wide transparency range. GaSe is a is very suitable material for SHG in the mid-IR.DIEN TECH provide GaSe crystal with unique large size and high quality. The frequency-doubling properties of GaSe were studied in the wavelength range between 6.0 µm and 12.0 µm. GaSe has been successfully used for efficient SHG of CO2 laser (up to 9% conversion); for SHG of pulsed CO, CO2 and chemical DF-laser (l = 2.36 µm) radiation; upconversion of CO and CO2 laser radiation into the visible range; infrared pulses generation via difference frequency mixing of Neodymium and infrared dye laser or (F-)-centre laser pulses; OPG light generation within 3.5–18 µm; terahertz (T-rays) radiation generation. It is impossibile to cut crystals for certain phase matching angles because of material structure (cleave along (001) plane) limiting areas of applications. GaSe is very soft and layered crystal. For production of crystal with specified thickness we take thicker starting blank ,For example, 1-2 mm thick and then begin to remove layer by layer trying to approach to ordered thickness while keeping good surface smoothness and flatness. However, for thicknesses about 0.2-0.3 mm or less GaSe plate easily bends and we obtain curved surface instead of flat one. So we usually stay at 0.2 mm thickness for 10x10 mm crystal mounted in in dia.1'' holder with CA opening dia. 9-9.5 mm. Sometimes we accept orders for 0.1 mm crystals, however, we do not guarantee good flatness for so thin crystals. Main Properties of GaSe crystals: Transparency range, µm 0.62 - 20 Point group 6m2 Lattice parameters a = 3.74, c = 15.89 Å Density, g/cm3 5.03 Mohs hardness 2 Refractive indexes: at 5.3 µm no= 2.7233, ne= 2.3966 at 10.6 µm no= 2.6975, ne= 2.3745 Non-linear coefficient, pm/V d22 = 54 Walk off 4.1° at 5.3 µm Optical damage threshold, MW/cm2 28 (9.3 µm, 150 ns); 0.5 (10.6 µm, in CW mode); 30 (1.064 µm, 10 ns)

Specification Snapshot
Refractive indexes no [λ=5.3μm]
2.7233
Refractive indexes ne [λ=5.3μm]
2.3966
Refractive indexes no [λ=10.6μm]
2.6975
Refractive indexes ne [λ=10.6μm]
2.3745
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Overview

Gallium Selenide (GaSe) non-linear optical single crystal, combining a large non-linear coefficient, a high damage threshold and a wide transparency range. GaSe is a is very suitable material for SHG in the mid-IR.DIEN TECH provide GaSe crystal with unique large size and high quality. The frequency-doubling properties of GaSe were studied in the wavelength range between 6.0 µm and 12.0 µm. GaSe has been successfully used for efficient SHG of CO2 laser (up to 9% conversion); for SHG of pulsed CO, CO2 and chemical DF-laser (l = 2.36 µm) radiation; upconversion of CO and CO2 laser radiation into the visible range; infrared pulses generation via difference frequency mixing of Neodymium and infrared dye laser or (F-)-centre laser pulses; OPG light generation within 3.5–18 µm; terahertz (T-rays) radiation generation. It is impossibile to cut crystals for certain phase matching angles because of material structure (cleave along (001) plane) limiting areas of applications. GaSe is very soft and layered crystal. For production of crystal with specified thickness we take thicker starting blank ,For example, 1-2 mm thick and then begin to remove layer by layer trying to approach to ordered thickness while keeping good surface smoothness and flatness. However, for thicknesses about 0.2-0.3 mm or less GaSe plate easily bends and we obtain curved surface instead of flat one. So we usually stay at 0.2 mm thickness for 10x10 mm crystal mounted in in dia.1'' holder with CA opening dia. 9-9.5 mm. Sometimes we accept orders for 0.1 mm crystals, however, we do not guarantee good flatness for so thin crystals. Main Properties of GaSe crystals: Transparency range, µm 0.62 - 20 Point group 6m2 Lattice parameters a = 3.74, c = 15.89 Å Density, g/cm3 5.03 Mohs hardness 2 Refractive indexes: at 5.3 µm no= 2.7233, ne= 2.3966 at 10.6 µm no= 2.6975, ne= 2.3745 Non-linear coefficient, pm/V d22 = 54 Walk off 4.1° at 5.3 µm Optical damage threshold, MW/cm2 28 (9.3 µm, 150 ns); 0.5 (10.6 µm, in CW mode); 30 (1.064 µm, 10 ns)

Specifications

ParameterValue
Transparency range0.62~20 μm
Point group6m2
Lattice parametersa=3.74，c=15.89
Density5.03 g/cm³
Mohs hardness2
Refractive indexes no [λ=5.3μm]2.7233
Refractive indexes ne [λ=5.3μm]2.3966
Refractive indexes no [λ=10.6μm]2.6975
Refractive indexes ne [λ=10.6μm]2.3745
Non-linear coefficient d2254 pm/V
Walk off [5.3μm]4.1 °
Optical damage threshold [9.3μm，150ns]28 MW/cm²
Optical damage threshold [10.6μm，CW mode]0.5 MW/cm²
Optical damage threshold [1.064μm，10ns]30 MW/cm²

Applications

THz (T-rays) radiation generation THz Range：0.1-4 THz Efficient SHG of CO 2 laser (up to 9% conversion) For SHG of pulsed CO, CO2 and chemical DF-laser (l = 2.36 mkm) radiation Upconversion of CO and CO2 laser radiation into the visible range; infrared pulses generation via difference frequency mixing of Neodymium and infrared dye laser or (F-)-centre laser pulses OPG light generation within 3.5 - 18 mkm. SHG in the mid-IR (CO2, CO, chemical DF-laser etc.) upconversion of IR laser radiation into the visible range Parametric generation within 3 – 20 µm

Datasheet

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Supplier Information

Di
Dientech
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Chengdu Dien Photoelectric Technology Co., Ltd. is an energetic young crystalline materials technology company, specializing in the research, design, manufacture and sales of a series of nonlinear optical crystals, laser crystals, magneto-optic crystals and substrates. With excellent quality and competitiveness, the products are widely used in scientific research, beauty and industrial markets. The company has an experienced sales and engineering team dedicated to providing customized application solutions for customers in the global beauty, industrial and scientific research fields. The products meet European and world standards. Headquartered in Chengdu, China, DIEN TECH has customers all over the world, including the USA, Europe and Asia. DIEN TECH is committed to becoming one of the most reliable and high-quality photoelectric component suppliers in the world.

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