The 11th School on Acousto-optics and its Appli-cations was held during the ICU'2011 - International Congress on Ultrasonics'2011, Gdansk, Poland, 5-8 September 2011, incorporated within the Congress as one of the six structured sessions named as Acousto-optics in the first and the second days being one of the four parallel sessions of other ultrasonic topics of the Congress.

About 60-80 people attended the acousto-optics sessions where 16 papers were presented by participants from Algeria, Belgium, Brasile, France, Japan, Lithuania, Poland, Russia.