From 1966 to 1970 he visited the Extended Secondary School (EOS) in Aue in Saxony, where he simultaneously completed vocational training as a lathe operator in the Blema company.
At the same time he gave guest lectures on Old Dutch painting at the HUB, so as not to lose the connection to research and teaching during his practical work in the exhibition field.
Through the research focus on the "Art of Romanticism" set here by his doctoral mother Hannelore Gärtner, Vogel was involved in this specialisation from his time as an assistant.
Among his friends are the professors Konstanty Kalinowski (Poznań), Minoru Saito (Hiroshima), Juhan Maiste (Tallinn, Tartu), Gao Jianping (Beijing), Zdravko Radman (Zagreb), Joao Vicente Ganzarolli de Olivera (Rio de Janeiro), Wanghen Chen (Wuhan), Shenbing Zhang (Tsingtau), Jale Nejdet Erzen (Ankara) and the doctors Dariusz Kacprzak (Szczecin), Thorkild Kjærgaard (Nuuk).
This led him to many international congresses in France, Japan, China, Brazil, Finland, Czech Republic, Latvia, Turkey and Great Britain.
A six-week travel grant from the Kachima Foundation to Japan also enabled him to conduct comparative research on garden design, which has resulted in numerous publications.