The EYE SAFE LASER CRYSTAL Diaries
The EYE SAFE LASER CRYSTAL Diaries
Blog Article
The struggle of eye-safe laser crystals, Yb:Er:glass and Tm:YAG, will not be a great deal of a battle as It's really a complementary relationship. Both crystals present exceptional strengths, and their choice depends upon the specified application.
Despite the fact that these lasers function at wavelengths which are more unlikely to lead to retinal damage, they aren't entirely harmless. Poor handling and misuse can nevertheless cause likely hurt, which includes eye accidents.
We report on the superior common electrical power and large repetition price nanosecond pulsed eye-safe KGW Raman laser intracavity pushed by an acousto-optic Q-switched 1342 nm two-crystal Nd:YVO4 laser. Getting advantages of the cautiously picked two-composite-laser-crystal configuration, the extensively optimized gate-open up time of acousto-optic modulator plus the ingeniously made U-formed resonator, significant power and performance enhancements along with exceptional mode matching have been enabled.
A non-critically period matched KTA optical parametric oscillator intracavity pumped by an actively Q-switched Nd:GYSGG laser with dual signal wavelengths
The strategy of emission wavelengths lies at the pretty Main of laser technologies, dictating many parameters which include penetration depth, electrical power density, and safety steps. It’s no coincidence that Yb:Er:glass and Tm:YAG, two distinguished laser crystals, are noted for their eye-safe wavelengths.
The efficiency and usefulness of any laser technique are mainly dictated by its achieve parameters. The two Yb:Er:glass and Tm:YAG demonstrate distinctive qualities Within this facet, Every single leveraging its exceptional functions to get noticed in the broad spectrum of laser crystals.
In summary, eye-safe lasers and their corresponding gain media stand for a major advancement in laser technological know-how. By knowledge the performance, Positive aspects, possible risks, and customary varieties of attain media, users can safely and effectively utilize these applications in a variety of applications.
Nonetheless, it’s crucial to take into account that the expression “eye-safe�?is relative and not absolute. While the risk of retinal injuries is minimized with these lasers, they will nevertheless bring about ocular hurt, particularly at large energy stages or with extended publicity.
The one.five µm wavelength location is particularly interesting mainly because it coincides While using the bare minimum h2o absorption in Organic tissue. This attribute helps make Yb:Er:glass a perfect choice for biomedical purposes, in which it’s necessary to decrease probable tissue destruction.
Figure five(a) demonstrates the pulse width and peak electric power of the 2nd-Stokes laser for a operate on the incident pump electricity at fifty kHz. The heart beat width is below 2 ns and it decreases Together with the rising pump depth. The heart beat width could be as narrow as one.1 ns at 27.2 W, which is significantly more info shortened when compared with that of the basic laser and could be mostly attributed towards the Raman pulse compression[fifteen]. Moreover, the cascaded Raman procedure might also improve the influence of the pulse compression[43]. In addition, this sort of a brief pulse width might also have arisen from the shorter Raman cavity, that can reduce the spherical journey time on the Stokes photons and make the Develop-up from the Stokes laser pulse quicker. Correspondingly, the peak energy of a single pulse reaches nearly 40 kW. This is the highest peak power at any time reported with the eye-safe diamond Raman lasers to the best of our awareness. The standard output electric power and peak electric power being a function with the PRF are shown in Fig.
Significant regular electricity and superior repetition price eye-safe Raman laser pushed by a two-crystal Nd:YVO4 laser
Yb:Er:glass is usually Employed in length measurements, environmental monitoring, and defense programs as a consequence of its large get. Tm:YAG is fitted to higher-electricity apps like wind velocity measurements and atmospheric reports.
Yb:Er:glass is often Employed in distance measurements, environmental monitoring, and protection apps resulting from its significant get. Tm:YAG is suited to significant-electric power apps like wind velocity measurements and atmospheric research.
That is crucial in LIDAR systems, exactly where laser beams are projected onto a target and the mirrored light is analyzed to find out the distance.
Though Yb:Er:glass supplies large optical gain and an eye-safe emission wavelength, Tm:YAG is much more suited for superior-electric power programs. Within the realm of distant sensing and LIDAR applications, both equally crystals demonstrate being indispensable assets, guaranteeing eye safety whilst also catering to varied specific necessities.