Stimulated Raman scattering in soft glass fluoride fibers

Abstract

We have measured the absolute Raman gain spectrum in short fluoride soft glass fibers with a pump wavelength of 1650 nm. We found a peak gain of g R ¼ 4:0 AE 2 × 10 −14 m W −1 .

Supercontinuum generation in ZBLAN fibers—detailed comparison between measurement and simulation

“…In 2011 the full Raman gain spectrum was measured at 1650 nm in a ZBLAN fiber (53%ZrF 4 ─29%BaF 2 ─ 3%LaF 3 ─3%AlF 3 ─12%NaF) with a core diameter of 10.7 μm by us, as detailed above [22]. Our measurements confirm the ZBLAN peak at ν 1 17.4 THz, and we also find a second broader peak as in [42] but at ν 2 12.4 THz.…”

“…Our measurements confirm the ZBLAN peak at ν 1 17.4 THz, and we also find a second broader peak as in [42] but at ν 2 12.4 THz. Recently, bulk measurements of a ZBLAN glass with the same composition as the fiber investigated here by us and in [22] placed the two peaks at 17.7 and 8.4 THz with identical amplitudes of 1.15 · 10 −11 cm∕W [23].…”

“…As mentioned, the Raman response of ZBLAN, in particular, is a source of uncertainty in reported numerical simulations of SCG. Based on a pulsed Raman measurement in the actual fiber we investigate here [22], we find a value of f R 0.062 of the fractional Raman contribution in our ZBLAN fiber. The reason why our value differs significantly from the values of f R 0.193 given in [9], the value of f R 0.20 chosen in [10], and the value of f R 0.24 found in [23], is discussed in Subsection 4.C.…”

“…(9) of the Raman response in ZBLAN, we have measured the Raman gain profile in our fiber [22]. The measurement was performed in a copropagating pump-probe experiment, and the recorded gain profile is shown in Fig.…”

“…The Raman response function is based on our measurement of the Raman gain in ZBLAN presented in [22]. Finally, in Section 5, we compare measurements and simulations of SCG.…”