Silver Selenogallate (AgGaSe2) and Silver Thiogallate (AgGaS2) crystals are widely used in laser frequency conversion, difference frequency generation, optical parametric amplification, electro-optic modulation, and electro-optical deflection applications.
Silver Gallium Sulfide (AgGaS2) and Silver Gallium Selenide (AgGaSe2) crystals have recently gained significant interest for mid- and deep-infrared (IR) applications due to their large nonlinear optical (NLO) coefficients and high transmission in the IR region.
The phase matching and transmission properties of AgGaS2 enable efficient three-wave interactions in the mid and near IR ranges. AgGaS2 is widely used as an effective NLO crystal for generating IR output between 3 to 10 μm, especially in optical parametric oscillator (OPO) devices pumped by Nd:YAG lasers, frequency mixing of OPO outputs pumped by Ti:Sapphire or Nd:YAG lasers, as well as frequency mixing of Nd:YAG lasers with dye, Ti:Sapphire, or other laser sources. Additionally, AgGaS2 has demonstrated efficiency as a frequency-doubling crystal for infrared radiation, such as the 10.6 μm output of CO2 lasers.
Optical Parametric Oscillators (OPOs) and Amplifiers (OPAs):
AgGaS2 and AgGaSe2 crystals are commonly employed in OPOs and OPAs for tunable laser sources.
Frequency Conversion:
These crystals convert infrared laser light into visible and ultraviolet wavelengths, useful in laser material processing, medical treatments, and scientific research.
Second-Harmonic Generation (SHG):
Used to generate coherent light at half the original wavelength, SHG applications include fluorescence microscopy, laser displays, and advanced imaging techniques.
Terahertz (THz) Generation:
Through difference frequency generation (DFG), these crystals can produce THz radiation, which is valuable in imaging, spectroscopy, and security screening.
Laser Systems:
Integrated into solid-state, tunable, and mode-locked lasers for telecommunications, environmental monitoring, and defense.
Nonlinear Optical Research:
Widely used in experimental studies of nonlinear optics and quantum phenomena.
Biomedical Imaging:
Enable multiphoton microscopy for deep tissue imaging with high resolution and minimal photodamage.
Remote Sensing:
Applied in LIDAR systems for atmospheric, environmental, and geological surveys.
Defense and Security:
Utilized in laser rangefinders, target designators, and countermeasure technologies.
AgGaS2 and AgGaSe2 crystals are carefully packaged in moisture-resistant, airtight containers with desiccants to maintain optical quality and ensure safe transport and storage.
Flatness |
l/ 8@633nm |
S/D |
10/5 to MIL-O-13830A |
Parallelism |
20" |
Perpendicularity |
5 arc minutes |
Angle Tolerance |
Δθ<0.5° Δψ 0.5 |
Dimension Tolerance |
±0.1mm |
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