The perfect choice of one-stop service for diversification of architecture.
that should become something aggravating. Does she have Munchhausen bi-proxy syndrome? If she has 2 lazy eyes and a David Letterman style hollow enamel, you ought to marry the wide. Take a gamble Kitty
1. My penis is hurting because of a glass rod (worm)?
Sounds like it is the right choice to me. I do not think you want to leave it there because of what these other chaps are saying
2. Is using MAPP gas safe to heat a glass rod than using the rod to smoke a bowl safe ?
A flame from MAPP is much hotter than a flame from Butane. So the MAPP flame runs the risk of melting the glass and you inhaling molten glass. Not safe!
3. Researchers Use Nano-Particles to Increase Power, Improve Eye Safety of Fiber Lasers
WASHINGTON, May 29, 2020 /PRNewswire/ -- Scientists at the U.S. Naval Research Laboratory have devised a new process for using nano-particles to build powerful lasers that are more efficient and safer for your eyes. They are doing it with what is called "rare-earth-ion-doped fiber." Put simply, it's laser light pumping a silica fiber that has been infused with rare earth ions of holmium. According to Jas S. Sanghera, who heads the Optical Materials and Devices Branch, they have achieved an 85 percent efficiency with their new process. "Doping just means we are putting rare earth ions into the core of the fiber, which is where all the action happens," Sanghera explained. "That's how we've produced this world record efficiency, and it's what we need for a high-energy, eye-safer laser." According to Colin Baker, research chemist with the Optical Materials and Devices Branch, the lasing process relies on a pump source--most often another laser-which excites the rare earth ions, which then emit photons to produce a high quality light for lasing at the desired wavelength. "But this process has a penalty," Baker said. "It's never 100 percent efficient. What you are putting in is pump energy, not the high quality light at the wavelength you want. What is coming out is a much higher quality of light at the specific wavelength that you want, but the remaining energy that is not converted into laser light is wasted and converted into heat." That loss of energy, Baker said, ultimately limits power scaling and the quality of the laser light, which makes efficiency especially important. With the aid of a nano-particle would opant,' they are able to achieve the 85 percent level of efficiency with a laser that operates at a 2 microns wavelength, which is considered an "eye-safer" wavelength, rather than the traditional 1 micron. Of course, Baker pointed out, no laser can be said to be safe when it comes to the human eye. The danger arises from the potential of scattered light to be reflected into the eye during a laser's operation. Scattered light from the path of a 100-kilowatt laser operating at 1 micron can cause significant damage to the retina, leading to blindness. With an eye-safer laser, operated at wavelengths beyond 1.4 micron, however, the danger from scattered light is considerably lessened. According to Baker, the nano-particle doping also solves several other problems, such as that it shields the rare earth ions from the silica. At 2 microns, the silica's glassy structure can reduce the light output from the rare earth ions. The nanoparticle doping also separates the rare earth ions from each other, which is helpful since packing them closely together can also reduce the light output. "Traditional lasers that operate at 1 micron, using an ytterbium dopant, are not nearly as affected by these factors," Baker said. "The solution was some very clever chemistry that dissolved holmium in a nano-powder of lutetia or lanthanum oxide or lanthanum fluoride to create a suitable crystal environment [for the rare earth ions]," Sanghera said. "Using bucket chemistry to synthesize this nano-powder was key in keeping the cost down." The particles of the nano-particle powder, which Sanghera's team had originally synthesized for a previous project, are typically less than 20 nanometers, which is 5,000 times smaller than a human hair. "Additionally, we had to be able to successfully dope these nano-powders into the silica fiber in quantities that would be suitable to achieve lasing," he added. At the Optical Materials and Devices Branch, Sanghera's team of scientists are working with a room-sized, glass-working lathe, where the glass that will eventually become the fiber is cleaned with fluorine gases, molded with a blow torch and infused with the nano-particle mixture - what the scientists call a "nanoparticle slurry." The result is a rare-earth-ion-doped, one-inch diameter, glass rod, or "optical preform." Next door, scientists use a fiber pulling system-a tower so massive that it takes up two large rooms and; the height of two floors of the building-to soften the preform with a furnace and elongate it, in a process akin to pulling taffy, into an optical fiber about as thin as a human hair, which then spools onto a nearby large spindle. Sanghera's team has already submitted a patent application for the process. Among the potential applications they envision for the new specialty fiber laser are high powered lasers and amplifiers for defense, telecommunications and even welding and laser-cutting. "From a fundamental perspective, the whole process is commercially viable," Sanghera said. "It's a low-cost process to make the powder and incorporate it into the fiber. The process is very similar to making telecom fiber." The U.S. Naval Research Laboratory provides the advanced scientific capabilities required to bolster our country's position of global naval leadership. With more than 2,500 personnel scientists, engineers and support staff, it has served the U.S. Navy and the nation for nearly 100 years, advancing research further than you can imagine. For more information, visit the NRL website and join the conversation on Twitter, Facebook, and YouTube.