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Problem of coherence in modern optoelectronics and relaxed optics

The problem of coherence in modern optoelectronics (MOE) and Relaxed Optics (RO) is discussed. Classical and quantum conceptions of coherence are analyzed. Problem of coherence in RO is represented as problem of creation and change of coherent structures. Other problems of coherence breakdown, including phase coherence, and here applications in MOE and RO are discussed too.