The first International Workshop on Optical Waveguide Theory and Numerical Modelling was held in Teupitz, Germany, in 1992. Since then, the annual conference has moved across Europe, with one detour to Australia:

• 2012, Barcelona, Spain
• 2010, Cambridge, UK  
• 2009, Jena, Germany
• 2008, Eindhoven, The Netherlands  
• 2007, Copenhagen, Denmark
• 2006, Varese, Italy
• 2005, Sydney, Australia
• 2005, Grenoble, France
• 2004, Ghent, Belgium
• 2003, Prague, Czech Republic
• 2002, Nottingham, UK
• 2001, Paderborn, Germany  
• 2000, Prague, Czech Republic  
• 1999, Saint-Etienne, France
• 1998, Hagen, Germany
• 1997, Enschede, The Netherlands
• 1995, Roosendaal, The Netherlands
• 1994, Siena, Italy
• 1993, Vevey, Switzerland
• 1992, Teupitz, Germany.