SINCE quartz is transparent in the ultra-violet, the employment of the powerful technique for Raman-effect studies developed by Rasetti, in which the 2537 A. radiation from a water-cooled magnet ...

Unlike erbium-doped fiber amplifiers (EDFAs), which boost wavelengths in the 1530-1610 nm range, a Raman amplifier can increase the signal strength of any wavelength by pumping at 13THz more than ...

Figure 4e shows the sapphire PL intensity, with Figure 4f displaying the corresponding spectra, demonstrating that the sapphire PL was reduced in the areas with the highest GaN Raman intensity.