Raman gain measurements of thallium-tellurium oxide glasses

Low frequency Raman gain measurements using chirped pulses.

Two-beam coupling, attributed to Raman gain, is observed in dielectrics using chirped femtosecond pulses. A time resolved pump-probe geometry is used to vary the frequency difference between pulses in the terahertz frequency band. Stimulated Raman scattering couples the pulses transferring energy from the higher to the lower frequency beam, resulting in a dispersion shaped curve as a function o...

Telescopic Raman Measurements of Glasses of Mineral Compositions to a Distance of 10 Meters

Introduction: Reflectivity spectra of Martian bright regions and laboratory experiments on synthetic glasses have indicated the presence of glass on the surface of Mars [1-3]. Glass formation on Mars can be from both volcanic and impact processes. Because of the broad nature of the reflectance bands, the exact composition and amount of glass on the surface of Mars is still a subject of discussi...

Raman spectra of GexAsySe1−x−y glasses

Various Ge–As–Se glasses spanning a mean coordination number MCN from 2.2 to 2.94 have been investigated using differential scanning calorimetry and Raman spectroscopy. The glass transition temperature Tg was found to increase with increasing MCN, except for those glasses located within the nanoscale phase-separated region of the phase diagram. The evolution of Raman features at wavenumbers fro...

Oxide glasses pdf

Observation of Raman Gain in Reduced Length of Bismuth Erbium Doped Fiber

Raman amplification of a 49 cm Bismuth oxide (Bi2O3) as a nonlinear gainmedium based erbium doped fiber amplifier (EDFA) is reported in new and compactdesign in near infrared spectral regions. The bismuth glass host provides theopportunity to be doped heavily with erbium ions to allow a compact optical gain fiberamplifier design by using reduced fiber length and the 1480...