Thermal effects vs. gain in femtosecond laser written waveguides in neodymium doped fused silica

Matthäus, G.G.MatthäusBurghoff, J.J.BurghoffWill, M.M.WillNolte, S.S.NolteTünnermann, A.A.Tünnermann2022-03-032022-03-032006https://publica.fraunhofer.de/handle/publica/21032210.1007/s00339-006-3560-xThe influence of thermal effects in gain measurements of fs laser-written waveguides in actively doped glass is reported for the first time. We show that these effects strongly contribute to the signal enhancement (up to 50% observed). Thus, a new measurement scheme to distinguish between thermal induced signal increase and real amplification is proposed.en620621Thermal effects vs. gain in femtosecond laser written waveguides in neodymium doped fused silicajournal article