ZGP (Zinc Germanium Phosphide) is a nonlinear crystal that has been gaining attention for its potential applications in mid-infrared (MIR) generation, sensing, and imaging. It has a relatively high nonlinear coefficient and wide transparency range in the MIR region, which makes it a promising candidate for use in frequency conversion and optical parametric amplification.
In frequency conversion, ZGP is used to convert laser radiation from one frequency to another by nonlinear optical processes such as difference frequency generation and optical parametric amplification. This process is used to generate laser light in the MIR region, which has applications in areas such as spectroscopy, sensing, and imaging.
ZGP is also used in optical parametric amplification, where it can be used to amplify laser pulses at a specific frequency range by transferring energy from a pump beam. This process is used for applications such as ultrafast laser systems and nonlinear optics.
ZGP has several advantages over other MIR nonlinear crystals, such as AgGaS2 and AgGaSe2. It has higher damage threshold and is easier to grow and process, making it more suitable for high-power and high-energy applications.
|Transparency range, µm||0.75 - 12.0|
|at 2.00 µm||no = 3.1490; ne = 3.1889|
|at 4.00 µm||no = 3.1223; ne = 3.1608|
|at 6.00 µm||no = 3.1101; ne = 3.1480|
|at 8.00 µm||no = 3.0961; ne = 3.1350|
|at 10.00 µm||no = 3.0788; ne = 3.1183|
|at 12.00 µm||no = 3.0552; ne = 3.0949|
|Non-linear coefficient, pm/V||d36 = 68.9 (at 10.6 µm), d36 = 75.0 (at 9.6 µm)|
|Optical damage threshold, MW/cm2||60 (at 10.6 µm, 150 ns)|