Abstract: In one embodiment, the instant invention is an optical structure that includes: an optical active medium of a solid state laser, where the optical active medium has a first coefficient of thermal expansion; and a protective structure that is directly cladded a portion of the optical active medium, where the protective structure has a second coefficient of thermal expansion which matches the first coefficient of thermal expansion of the optical active medium, and where the protective structure is transparent to a wavelength that is within an absorption band of the optical active medium so that the optical structure has: the optical active medium that is protected from a physical damage, and the optical active medium that is capable of generating a laser beam having a first energy that is larger than a second energy generated by a control optical structure having the optical active medium without the protective structure.

Abstract: In one embodiment, the instant invention is an optical structure that includes: an optical active medium of a solid state laser, where the optical active medium has a first coefficient of thermal expansion; and a protective structure that is directly cladded a portion of the optical active medium, where the protective structure has a second coefficient of thermal expansion which matches the first coefficient of thermal expansion of the optical active medium, and where the protective structure is transparent to a wavelength that is within an absorption band of the optical active medium so that the optical structure has: the optical active medium that is protected from a physical damage, and the optical active medium that is capable of generating a laser beam having a first energy that is larger than a second energy generated by a control optical structure having the optical active medium without the protective structure.

Abstract: The invention relates to a generator of the harmonic of laser light destined in particular for application in the equipment for spectrometric measurements carried out with the laser technique. The substance of the invention is to shorten many times the optic route in the generator of the harmonic of laser light by the replacement of the system of elements of a zero dispersion by at least one dispersive element of a great dispersion, in particular by a rutile prism, combined with the system reversing the polarization surface by 90.degree., in partricular with a 90.degree. polarization rotator or a half-wave plate.