On stage as well as off in her modest apartment opposite the Bois de Vincennes, American choreographer Carolyn Carlson is one of the rare modern dancers who still radiates a penetrating positive energy in everything she does, who dares to express what she calls “dark brightness” in her work and defends simplicity and purity in life and movement that emanate from the fires inside. In between her non-stop wanderings over the past 25 years – touring her solos “Blue Lady” and “Vu d’ici” (premiered last spring at the Théâtre de la Ville), teaching and guest choreographing for Europe’s leading dance companies, such as the Helsinki City Ballet – Paris has been home for Carlson, and she’s back for a few weeks to prepare for the premiere of “Sub Rosa,” her long-awaited piece created for Stockholm’s Cullberg Ballet, opening April 23 at the Théâtre de la Ville.