original_query: What is the purpose of the "Femtosecond Laser Complex" at the Center for collective use? What is the most relevant chunk to answer the query?
query: What is the purpose of the Femtosecond Laser Complex at the Institute of Physics of the National Academy of Sciences of Ukraine?
answer: The provided text does not specify the purpose of the Femtosecond Laser Complex, only that it is a state-of-the-art facility within the Institute's more than 20 scientific units.