Barium Gallium Selenide Crystal for Nonlinear Optics

Product Description

Barium Gallium Selenide (BGSe)
Nature and Characteristics:
BaGa4Se7 (BGSe for short) has large band gap (2.64eV), wide light transmission range (0.47~18μm), large nonlinear effect (d11=24.3 pm/V, d13=20.4 pm/V) and moderate birefringence (δ n = 0.06 @ 2. BGSe crystal has good growth performance, and it is easy to obtain large-size and high-quality single crystals, which is suitable for high power output. BGSe crystal can be pumped by 1~3μm laser, and the highest tunable laser can reach 18 μ m.
Main Applications:
1. Wide pump source range and tunable infrared output band (3-18um).
2. 2μm pump can realize non-critical phase matching (NCPM) and output high-power long-wave infrared laser with more than 10 μ m.
3. OPA, OPO, DFG and other spectrum and detection fields.
Basic Parameters:

Transmission Range	0.47 - 18 μm
Lattice Constant	a=7.6252(15)Å,b=6.5114(13)Å,c=14.702(4)Å,β=121.24(2),Z=2
Density	5.16 g/cm³
Nonlinear Coefficient	(d11)=24.3 pm/V
Melting Point	1029ºC
Absorptivity	<0.01 cm-1 @ 2.09 µm
Thermal Conductivity	<1.0 W/M/°C
Damage Threshold	156 MW/cm² @8.6ns, 1.053μm

Processing Parameters:

Orientation Accuracy	<±0.1°
Surface Quality	20/10 per MIL-O-13830A
Surface Flatness	λ/8@632.8nm for T ≥ 1 mm
Clear Aperture Tolerance	+0/-0.1 mm
Length Tolerance	±0.1 mm
Parallelism	30″
Perpendicularity	10′

About Us:
Crystrong Photonics Technology Co., Ltd. was established in 2012. The company integrates research and development (R&D), production, and sales, covering the entire laser industry chain. It serves the global laser application field and is committed to becoming a globally influential laser industry solution provider. Crystrong excels in various crystal growth technologies. Their crystal products span the infrared, visible light, and ultraviolet bands, and they have a track record of supporting large-scale national projects. As a long-term strategic partner of renowned domestic and foreign laser manufacturers, Crystrong offers dozens of conventional pockels cell models. These models encompass a variety of crystal materials, wavelengths, and frequencies. Additionally, special pockels cell models can be customized to meet customers' diverse use environments and application requirements. Crystrong also provides coating services and a range of lens optics components, which constitute the core advantage of their entire industry chain, ensuring superior product quality and competitive pricing.
Company Photos:
Qualification Certificate:

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