EYE SAFE LASER CRYSTAL - An Overview
EYE SAFE LASER CRYSTAL - An Overview
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The 2.0 µm wavelength area also coincides with a solid absorption line of drinking water vapor. This would make Tm:YAG exceptionally suitable for atmospheric sensing and LIDAR applications, mainly because it can offer precise and trusted knowledge about atmospheric conditions.
In length measurement, As an illustration, the large optical attain of Yb:Er:glass permits the production of extreme laser beams that will travel very long distances without the need of substantial attenuation.
Like Yb:Er:glass, Tm:YAG doesn’t only count on its emission wavelength to shine. It is usually noted for its significant thermal conductivity and great mechanical properties, enabling it to face up to superior-electrical power functions and function reliably in a wide range of situations.
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For environmental monitoring, the emission wavelength of Yb:Er:glass comes into Participate in. As this wavelength coincides With all the lower-absorption window with the environment, it permits the transmission of laser beams in excess of prolonged distances devoid of important absorption by atmospheric constituents. This home is invaluable in programs like air quality checking and atmospheric studies.
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Regardless of the differences, both Yb:Er:glass and Tm:YAG carry on to play important roles while in the growing realm of laser technologies.
The higher achieve serves as the foundation for amplifying mild alerts, contributing to the greater extreme and targeted output laser beam that Yb:Er:glass is recognized for.
The battle in between both of these different types of laser crystals is centered all around their emission wavelengths, attain, and apps. Let’s dissect The 2 and find out how they square off against each other.
Figure two(b) shows the elemental laser beam radius on both of those the Nd:YVO4 and the diamond under various thermal lens focal lengths. In the case of a thermal lens by using a focal size as compact as one hundred seventy mm, the cavity is in a position to take care of a nicely-matched romantic relationship concerning the pump and the elemental laser.
Listed here, we proposed a V-shaped folded cavity to realize economical Procedure of an eye-safe intra-cavity diamond cascaded Raman laser. On the one particular hand, the thermal influence with the laser crystal was mitigated as a result of utilization of composite crystal As well as in-band pumping, and However, the method matching and cavity stability are promoted via the V-formed folded cavity. Because of this, a median output energy of 2.2 W by using a diode to 2nd-Stokes conversion effectiveness of 8.1% is properly obtained. The heartbeat width of the next-Stokes laser was dramatically lessened from sixty ns of the fundamental laser to 1.one ns due to the Raman pulse compression, which led to a peak ability of as much as 40 kW.
Regardless of the differences, each Yb:Er:glass and Tm:YAG proceed to Participate in significant roles in the growing realm of laser technological know-how.
We proposed and experimentally shown the technology of significant-ability 1176 nm Stokes wave by frequency shifting of the 885 nm diode-aspect-pumped Nd:YAG laser utilizing a YVO4 crystal in a very Z-formed cavity…
Also, this excellent electrical power check here dealing with means also contributes on the lengthy operational daily life and reliability of Tm:YAG crystals.
Eye Safe Laser Crystal Module The damage threshold for human eye is higher each time a laser by using a wavelength larger than one.four um, because when it's irradiated towards the human eye, the majority of its mild intensity is absorbed by the vitreous body, so it is not easy to break the retina at a certain electric power.( Taking the 1.57um laser for example, in accordance with the US countrywide protection criteria, its safe publicity to human eye is four hundred thousand situations that of the one.06um Nd:YAG laser at the moment employed.