MCCUMBER ANALYSIS AND GAIN CROSS-SECTION OF Er3+ ACTIVATED GADOLINIUM PHOSPHATE OXYFLUORIDE GLASSES FOR BROADBAND COMMUNICATION MATERIALS
McCumber Analysis of Er3+-Activated Oxyfluoride Glasses
DOI:
https://doi.org/10.55766/sujst11302Keywords:
Erbium, Gain Cross-Section, Mccumber Analysis, Phosphate Oxyfluoride GlassesAbstract
Er3+ activated gadolinium phosphate oxyfluoride glasses have been prepared via melt-quenching process and measured the absorption and luminescence spectra. The absorption spectra of glasses have shown in UV-VIS and Near-infrared region. The absorption intensity of glasses was enhanced as a function of Er2O3 concentrations. With laser diode excitation at 980 nm, the emission in near infrared region has shown a prominent peak at 1536 nm (4I13/2→4I15/2) which is important peak for transmission windows. The absorption and emission measurements led to calculate the stimulated emission cross-sections by McCumber analysis. It was found to be 2.66×10–20 cm2 for 2.0 mol% of Er2O3. Furthermore, the positive gain cross-section of glass is identified when the population inversion (P) is more than 0.4. It is pointed out the flat gain bandwidth in wavelength range 1400 - 1700 nm will be achieved when the P exceeds 40% which covered S, C and L bands.
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