April 8, 2013 | News & Notices Release of Laser Mirrors & Laser Windows for High Power Laser with Globally Top-Level Laser Induced Damage Thresholds Contributing to the Achievement of High Throughput Laser Finishing Machines
On April 8th, Shimadzu Corporation will release Laser Mirrors and Laser Windows optimized for use with high power lasers. These products will also be exhibited at LASER World of PHOTONICS (May 13th to May 16th, at Messe München GmbH).
In accordance with the development of fields related to laser applications, expectations are high for the implementation of higher power lasers. These will be used in industrial fields to increase the speed of laser finishing; in medical treatment fields for laser treatments and X-ray beam generation; and in physics and chemistry related fields to achieve high sensitivity laser measurements.
Laser Mirrors and Laser Windows are indispensable optical components of laser equipment. Unfortunately, when these optical elements are subjected to high power laser light, there have been problems with damage and loss of functionality. Accordingly, there have been calls for the development of optical elements with a high laser induced damage threshold.
As a result, Shimadzu has developed Laser Mirrors with a high damage threshold and high reflectance, and Laser Windows with a high damage threshold and high transmittance, for use with high power YAG lasers and Ti-sapphire lasers. By adopting amorphous coating techniques, at YAG laser wavelengths we have obtained Laser Mirrors with 1.4 times the conventional damage threshold, a globally top-level value*, and Laser Windows with 1.6 times the conventional damage threshold. In addition, these products provide high level performance, with reflectance values of 99.9% or higher for the Laser Mirrors and transmittance values of 99.5% or higher for the Laser Windows.
By contributing to the implementation of high power lasers, these products will contribute to the development of a variety of fields, including the expansion of applications in laser finishing fields, the achievement of cutting-edge medical treatments, analysis in the life sciences, and the development of new materials.
Note that these products utilize technology developed in collaboration with the Quantum Beam Science Directo Japan Atomic Energy Agency.
At Shimadzu, our lineup consists of 36 cost-efficient laser mirrors and 12 laser windows. By supplying these products on an OEM basis to manufactures in Japan and overseas, particularly laser finishing machine manufacturers, our goal for 2016 is 100 million yen in sales including customized parts.
In addition, in conjunction with the BEAM IMPACT series of external-cavity short-pulse semiconductor lasers released in September 2012, we are expanding our business aimed at next-generation high functionality laser finishing machines.
*As per Shimadzu investigations in September 2012.
1. High Laser Induced Damage Threshold
The mechanism of damage to optical elements by laser light was clarified through research in collaboration with the Japan Atomic Energy Agency. We have developed coating techniques for hard-to-crystallize amorphous films, which are effective against this mechanism of damage. As a result, we have realized these products, which provide a high damage threshold with respect to high power laser light.
2. High Reflectance and High Transmittance
We have added amorphous coating techniques to dielectric multilayer coating techniques, which alternately laminate dozens of layers of materials with different refractive indices, in films on the order of several hundred nanometers thick. As a result, the coarseness of the interface between the multilayer films has been minimized to the utmost. In this way, we have been able to keep scattering loss to the very minimum, to achieve high reflectance and high transmittance.
3. Extensive Lineup
Select the items appropriate to your application from a wide lineup of 36 Laser Mirrors and 12 Laser Windows.
Six sizes of Laser Mirror can be selected, ranging from φ 0.5 to 5 inches, and four sizes of Laser Window can be selected, ranging from φ 0.5 to 3 inches. In terms of wavelengths, these correspond to 1,064 nm, used as the fundamental harmonic of the YAG laser, and 532 nm, the second harmonic; as well as the 750 nm to 850 nm range for the Ti-sapphire laser. Furthermore, two Laser Mirror incident angles can be selected, at 0 deg. or 45 deg. All products are compliant with RoHS directives.
Note that coating characteristics and the substrate form can be specially designed to suit customer requirements.
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Shimadzu Laser Mirrors and Laser Windows with High Damage Thresholds