Lasers and Coherent Light Sources

Luminescence of Mn4+ in a Hexafluorogermanate with the Complex Organic Cation Guanidinium [C(NH2)3]2GeF6:Mn4+

“…If less than five phonons are sufficient to bridge the energy gap between excited state and ground state, non-radiative relaxation to the ground state usually becomes dominant. [50][51][52] The energy of the 2 E → 4 A 2 transition of Mn 4+ in GGF:Mn is on the order of 16000 cm −1 . The gap is equal to the energy of less than five NH 2 vibrations and thus the thermal quenching of PL in GGF:Mn can be traced back to multi-phonon relaxation.…”

Supplementary document for Broadband Second Harmonic Generation from Artificial Optical Nonlinearity - 5190824.pdf

“…Note that the illustrative wide waveband of the proposed metamaterial fully covers the CO 2 laser wavelengths ranging from 9.2 μm to 11 μm, one of the most widely-used lasers in the MIR regime [6]. Given the practical application scenario, we further studied the characteristics of the SHG with the pumping at the typical CO 2 laser wavelength of 10.6 μm.…”

Numerical analysis of laser transmitter nonlinearity compensation technique for radio over fiber system

“…There is a hierarchy of models describing the behavior of semiconductor lasers ranging from the Maxwell-Bloch equations to systems of delay-differential equations and simple rate equations [1]. A simple and powerful approach for understanding the basic dynamical behavior of a laser is based on a rate equation model in which simple balance equations for the total number of atoms undergoing a transition and the total number of photons created or annihilated are proposed [8].…”