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LG-930 Laser Glass
Feb 2010
SCHOTT North America Inc., Advanced OpticsRequest Info
DURYEA, Pa., Feb. 17, 2010 – Schott Advanced Optics is offering the LG-930 laser glass that lases at 1.5 µm, making it less damaging to the eye and rendering it suitable for use in biomedical applications such as skin rejuvenation, scar removal and analytical instrumentation.

It is an erbium-/ytterbium-/chromium-doped phosphate-based laser glass used primarily in flashlamp-pumped solid-state laser systems. Phosphate glasses generally offer higher solubility of rare-earth dopants, so the number of active ions can be significantly increased.

Advantages of the glass include good athermal properties, high transmission at the lasing wavelength, consistent quality and high homogeneity. Quality control is based on statistical process control and on rigorous final inspection of the finished component. Glass properties are measured for every melt. Measurement instruments include a variety of interferometers, spectrophotometers, physical property test systems, vision systems and a laser test bed.

This glass and the proprietary LG-x and APG-x laser glasses are typically doped with neodymium or erbium as active ions, but the company has successfully manufactured laser glasses with all rare earth ions and combinations thereof. Dopants are added to the existing base compositions of any standard laser glasses per customer specifications.

Erbium laser properties include an emission effective linewidth of 41.5 nm, an emission linewidth of 28.1 nm FWHM, fluorescence lifetime of 9 ms and loss at the lasing wavelength of 0.09 cm-1.

The lasing properties of a rod or slab are influenced by the quality of the polish and the coating. For consistency and reliability, the LG-930 is provided fully finished and dielectrically coated to customer specifications. High laser damage thresholds meet the requirements of demanding applications.


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dielectric coating
A high-reflectance coating consisting of alternating layers of quarter-wave film of a higher refractive index and lower refractive index than the substrate. Such coatings can be made very specific to a reflected wavelength or, by varying the layers' thicknesses or film indexes, spread over a wide wavelength interval.
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