Richter, DanielDanielRichterSiems, Malte-PerMalte-PerSiemsGoebel, Thorsten AlbertThorsten AlbertGoebelKrämer, Ria G.Ria G.KrämerNolte, StefanStefanNolte2023-01-202023-01-202022https://publica.fraunhofer.de/handle/publica/43413210.1364/BGPPM.2022.BW5A.62-s2.0-85144178192We demonstrate the first reflective VBGs in an athermal glass inscribed by ultrashort laser pulses. Grating properties are investigated and compared with theoretical predictions concerning their insensitivity to ambient temperature changes.enUltrashort pulsesconference paper