Optogama, UAB (Lithuania): Optical equipment manufacturer
Please contact the import agency Taihei Boeki for details.
Nonlinear crystal
Nonlinear Crystals
Optogama provides nonlinear crystals used for wavelength conversion and optical control of laser light.
These crystals are used in applications such as SHG (second harmonic generation), sum-frequency and difference-frequency generation, and optical parametric oscillation (OPO), and they cover a wide wavelength range from ultraviolet to infrared.
Our lineup includes a diverse range of materials, including BBO, LBO, KTP, and AgGaS₂ and GaSe for the infrared and mid-infrared regions. Featuring high nonlinearity coefficients, phase matching characteristics, and excellent laser damage resistance, these materials are widely applicable to processing, measurement, and research applications, and we also offer various customization options.
Product Selection
When selecting a nonlinear crystal, it is important to consider the laser wavelength to be used, the desired conversion process (SHG, THG, OPO, etc.), output power, and pulse characteristics.
BBO and LBO are widely used for highly efficient conversion from visible to ultraviolet, with LBO being particularly suitable for high-power lasers. KTP is widely used for frequency conversion of Nd:YAG lasers due to its high nonlinearity and ease of use.
In the mid-infrared region, AgGaS₂, AgGaSe₂, and GaSe are suitable, and the optimal material is selected according to the wavelength band and power output conditions. Furthermore, characteristics such as transmission range, phase matching conditions, nonlinear coefficients, and damage thresholds greatly affect performance.
In the mid-infrared region, crystals such as AgGaS₂, AgGaSe₂, GaSe, and CdSe are used depending on the application and wavelength range.
| Ingredients | Wavelength band | Main features | Main uses | Key characteristics |
|---|---|---|---|---|
| BBO | UV~visible~near infrared | Highly nonlinear and broadband | SHG, OPO, ultrashort pulse | Ideal for UV applications |
| LBO | UV to near infrared | High damage resistance and stability | High-power SHG, THG | For high power output |
| ID card | Visible to near infrared | High efficiency and easy to use | Nd:YAG harmonic | Highly versatile |
| KDP/DKDP | UV to visible | Large diameter compatible | High-energy pulse and large-diameter beam compatible | For large optical systems |
| LiNbO₃ | Visible to near infrared | Electro-optic properties | EO modulation, OPO | Multifunctional material (also compatible with nonlinear wavelength conversion) |
| AgGaS₂ | Mid-infrared | Wide IR transmission | IR conversion | mid infrared standard |
| AgGaSe₂ | Mid-infrared | Long wavelength compatible | IR-OPO | Strong on the longer wavelength side |
| GaSe | Mid-infrared | Highly nonlinear | IR conversion | Highly nonlinear (high design difficulty) |
| CdSe | Mid-infrared | Broadband IR transmission | IR use | For long-wavelength mid-infrared applications |
Selection criteria
- Wavelength conversion to visible and ultraviolet → BBO, LBO
- High output stable operation → LBO
- General-purpose harmonic converter → KTP
- High-energy pulses → KDP/DKDP
- Mid-infrared wavelength conversion → AgGaS₂, GaSe, AgGaSe₂, CdSe
- Multi-function (EO/OPO) → LiNbO₃
Technical supplement
Nonlinear crystals utilize the property that their dielectric polarization responds nonlinearly to the intensity of incident light to generate new wavelength components. By satisfying the phase matching condition, energy conversion efficiency is maximized, making it possible to obtain light of the desired wavelength with high efficiency.
Crystal transmission properties, birefringence, nonlinear coefficients, and damage thresholds significantly affect conversion efficiency and output stability; therefore, selecting materials optimized for the laser conditions is crucial.
Product List (Nonlinear Crystals)
| BBO crystals BBO crystals This is a representative nonlinear crystal with a wide transmission bandwidth from 188 nm to 5.2 µm and high nonlinear coefficients. Its excellent phase matching characteristics make it suitable for a wide range of applications, including SHG, THG, and OPO, and it exhibits particularly high performance in the ultraviolet region. It is also a suitable material for ultrashort pulse lasers and tunable light sources. |
| LBO crystal LBO crystals This crystal features a wide transmission bandwidth and an extremely high laser damage threshold, making it suitable for frequency conversion of high-power lasers. It enables non-critical phase matching through temperature control, achieving stable conversion efficiency. It is widely used in high-power applications such as SHG, THG, and OPO. |
| KTP crystal KTP crystals This is an easy-to-handle nonlinear crystal with high nonlinear coefficients and good mechanical stability. It is widely used for frequency conversion in Nd:YAG lasers and is suitable for low-to-medium power SHG applications. It is a highly versatile material combining a wide transmission bandwidth with high efficiency. |
| KDP / DKDP crystal KDP / DKDP crystals This nonlinear crystal, capable of producing large-diameter crystals, is suitable for high-energy laser systems. It is particularly used for wavelength conversion applications with high peak power and large-area beams, and is widely utilized in laser nuclear fusion and large-scale laser facilities. |
| LiNbO₃ crystal (lithium niobate crystal) Lithium niobate crystals This is a multi-functional crystal possessing excellent nonlinear optical properties in addition to electro-optical properties. It is widely used in optical modulators, OPOs, and frequency conversion elements, playing a crucial role in communication, measurement, and research fields. It is suitable for applications requiring simultaneous wavelength conversion and optical control. |
| AgGaS₂ crystal AgGaS₂ crystals This nonlinear crystal exhibits broad transmission characteristics up to the mid-infrared region, making it suitable for infrared wavelength conversion and OPO applications. Its relatively high nonlinearity makes it a suitable material for mid-infrared light generation using 1µm band lasers. |
| AgGaSe₂ crystal AgGaSe₂ crystals This is a mid-infrared nonlinear crystal capable of handling even longer wavelengths than AgGaS₂. Its wide transmission range and excellent nonlinear properties make it suitable for long-wavelength IR-OPO and wavelength conversion applications. It is an ideal material for extending the mid-infrared region. |
| GaSe crystal GaSe crystals This mid-infrared crystal possesses extremely high nonlinear coefficients, enabling highly efficient wavelength conversion. Leveraging its wide transmission bandwidth and strong nonlinear response, it is used for highly efficient conversion in the infrared region and for generating special wavelengths. |
| CdSe crystal CdSe crystals This nonlinear crystal exhibits broad transmission characteristics in the mid-infrared region and is used for specific IR wavelength conversion applications. While its applications are relatively limited, it is a material that demonstrates effective nonlinear properties in specific wavelength bands. |
