The fight of eye-safe laser crystals, Yb:Er:glass and Tm:YAG, isn't much a battle as It is just a complementary relationship. Both crystals offer you special benefits, as well as their range is determined by the desired application.
The principle of emission wavelengths lies with the incredibly Main of laser know-how, dictating quite a few parameters such as penetration depth, electricity density, and safety measures. It’s no coincidence that Yb:Er:glass and Tm:YAG, two distinguished laser crystals, are observed for their eye-safe wavelengths.
Although eye-safe lasers have drastically improved the safety profile of laser technologies, it is important to keep in mind that they're not completely risk-free.
Relocating on to Tm:YAG, the narrative shifts marginally. This laser crystal features a dominant emission line from the vicinity of 2.0 µm, a spread that is also regarded as eye-safe. Even so, it’s the exceptional Houses linked to this specific wavelength that really set Tm:YAG aside.
These crystals let researchers to get precise facts with regards to the h2o vapor profile of your environment, that's essential for temperature prediction and climate scientific tests.
We report over a high average energy and significant repetition rate nanosecond pulsed eye-safe KGW Raman laser intracavity pushed by an acousto-optic Q-switched 1342 nm two-crystal Nd:YVO4 laser. Using benefits of the meticulously chosen two-composite-laser-crystal configuration, the comprehensively optimized gate-open time of acousto-optic modulator as well as the ingeniously built U-shaped resonator, substantial ability and performance enhancements together with remarkable manner matching are already enabled.
As an example, the more time wavelengths of eye-safe lasers might cause harm to the cornea or the lens because of absorption. For that reason, correct safety steps and guidelines need to however be adopted diligently when handling and functioning these lasers.
Having said that, it’s vital to do not forget that the term “eye-safe�?is relative rather than complete. Whilst the chance of retinal injuries is minimized with these lasers, they can still result in ocular destruction, specifically at significant electric power concentrations or with extended exposure.
For example, particular eye-safe lasers can cause injury towards the cornea or the lens, significantly If your publicity is prolonged or maybe the laser energy is superior.
Figure 2(b) demonstrates the fundamental laser beam radius on both equally the Nd:YVO4 along with the diamond under different thermal lens focal lengths. In the case of a thermal lens that has a focal size as modest as 170 mm, the cavity is in a position to take care of a properly-matched connection amongst the pump and the basic laser.
Here, we proposed a V-shaped folded cavity to achieve productive operation of here a watch-safe intra-cavity diamond cascaded Raman laser. Within the one particular hand, the thermal influence of the laser crystal was mitigated because of the utilization of composite crystal and in-band pumping, and Then again, the method matching and cavity balance are promoted by the V-shaped folded cavity. Therefore, a mean output electrical power of 2.2 W having a diode to second-Stokes conversion performance of 8.1% continues to be successfully received. The heartbeat width of the 2nd-Stokes laser was considerably diminished from sixty ns of the elemental laser to 1.one ns due to Raman pulse compression, which resulted in a peak power of up to 40 kW.
Going on to Tm:YAG, the narrative shifts a little. This laser crystal includes a dominant emission line in the vicinity of two.0 µm, a range that may be also regarded as eye-safe. Nonetheless, it’s the unique Homes related to this distinct wavelength that really set Tm:YAG apart.
When Yb:Er:glass provides higher optical acquire and a watch-safe emission wavelength, Tm:YAG is a lot more suited for substantial-power purposes. Within the realm of remote sensing and LIDAR programs, both equally crystals show for being indispensable belongings, making certain eye safety though also catering to various particular prerequisites.
When a laser beam interacts Using the human eye, the nature in the damage incurred relies upon noticeably around the laser’s wavelength. Sure wavelengths are more quickly absorbed from the cornea or perhaps the lens, while some penetrate even further to your retina, The sunshine-sensitive layer in the back of the attention.
Considered one of the significant characteristics of Yb:Er:glass is its high optical gain. Basically, Which means a little input of energy can result in a significant output of laser light.