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Resolving power and information properties of acousto-optic tunable filters

As other acousto-optic devices, acousto-optic tunable filters (AOTF) deal with information processing and transmission. However, in major cases, AOTF transmits information in a specific form--the data are contained in output light spectrum or wavelength. The estimation of possible amount of information which can be processed and transmitted by AOTF, requires to define the resolving power of a device by wavelength. The wavelength resolving power criterion has been elaborated in the presented paper. It proceeds from the condition of the necessary probability of one bit of information recognition. Taking into consideration this criterion as well as the need to distinguish gray scales in a pattern of wavelengths, the information transmission capability of AOTF has ben calculated. Along with that, it has been shown that such parameter as information capacity of AOTF represents a significant importance while analyzing the spectral composition of light transmitted through media to be studied. Some features of tellurium dioxide single crystals influencing the AOTF information possibilities, have been discussed.