Related Experiment Video
Updated: Jul 9, 2026
10:17
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
Published on: July 12, 2017
Noncritically phase-matched frequency conversion in Gd(x)Y(1-x)Ca(4)O(BO(3))(3) crystal.
Optics Letters
|December 12, 2007
Summary
Researchers explored a new nonlinear optical crystal, Gd(x)Y(1-x)Ca(4)O(BO(3))(3), for efficient third-harmonic generation (THG). This material offers noncritical phase-matching, simplifying laser applications.
Area of Science:
- Nonlinear optics
- Materials science
- Laser physics
Background:
- Yttrium calcium oxyborate (YCa(4)O(BO(3))(3) or YCOB) crystals are known for nonlinear optical applications.
- Third-harmonic generation (THG) is crucial for frequency conversion in lasers, but often requires precise phase-matching conditions.
Purpose of the Study:
- To investigate the potential of Gd(x)Y(1-x)Ca(4)O(BO(3))(3) solid solutions for achieving noncritical phase-matching in THG.
- To characterize the nonlinear optical properties of Gd(x)Y(1-x)Ca(4)O(BO(3))(3) for THG applications.
Main Methods:
- Synthesis of Gd(x)Y(1-x)Ca(4)O(BO(3))(3) solid solutions by substituting Gadolinium (Gd) for Yttrium (Y) in the YCOB crystal structure.
- Experimental determination of phase-matching angles for THG of a Nd:YAG laser (1.064 μm fundamental wavelength).
- Characterization of the THG properties for the specific composition Gd(0.28)Y(0.72)Ca(4)O(BO(3))(3).
Main Results:
- Partial substitution of Gd for Y in YCOB gradually shifts the phase-matching angles for THG.
- The composition Gd(0.28)Y(0.72)Ca(4)O(BO(3))(3) exhibits noncritical phase-matching (NCPM) at (θ, φ) = (90°, 90°).
- The properties of noncritically phase-matched THG were successfully demonstrated in this material.
Conclusions:
- Gd(x)Y(1-x)Ca(4)O(BO(3))(3) solid solutions offer a tunable platform for achieving noncritical phase-matching in THG.
- Noncritical phase-matching simplifies optical setups and can improve the efficiency and stability of THG processes.
- This material shows promise for advanced laser applications requiring efficient frequency conversion.
Related Concept Videos
01:29Determination of Crystal Structures
In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
02:18X-ray Crystallography
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
01:26Imperfections in Crystal Structure: Stoichiometric Point Defects
Schottky defects arise when some lattice points in a crystal, such as those in NaCl, remain unoccupied, creating lattice vacancies without disturbing the overall electrical neutrality of the crystal. This defect is common in ionic crystals where the positive and negative ions are similar in size, as seen in sodium chloride and cesium chloride. The presence of Schottky defects enables the crystal to conduct electricity to a small extent through an ionic mechanism. Electric fields cause nearby...
01:29Imperfections in Crystal Structure: Non-Stoichiometric Defects
Non-stoichiometric defects refer to a type of defect in the crystal structure of a compound where the ratio of its constituent elements deviates from the ideal stoichiometric ratio. There are two main types of non-stoichiometric defects: metal excess defects and metal deficiency defects.Metal excess defects occur when there is a slight surplus of metal ions than what is required by the stoichiometric ratio of the compound. For example, heating a sodium chloride crystal in sodium vapor results...