Relationship between the structure of microdefects in quartz glasses and the parameters of the SRS lines in optical fibers based on them

Medium-range ordering in glass structures as a background of photosensitivity in silica fibers

“…Indeed, it is possible to calculate the anharmonicity constants if the frequencies of the fundamental and the overtone vibrational bands are measured. In a frame of a simple two-atom model, the measured vibrational frequency m and the overtone frequency m ov are connected with the frequency x of the harmonic vibration and anharmonicity constant v. If a simple Morse anharmonic oscillator is used to model the vibrations [10], then the anharmonicity constants v can be calculated. The results are presented in Table 1.…”

“…In our previous studies, the fundamental spectroscopic aspects of multiple-cascade SRS excitation in silica-based fibers using high-power picosecond pulse laser pumping were formulated and some practical applications of nonlinear SRS spectroscopy in fibers were demonstrated [10][11][12]. It was pointed out that the SRS spectroscopy in fibers is a powerful technique for glass microstructural studies using definite correlations between the anharmonicity constants and the SRS Stokes bandwidths.…”