On the possibility of developing incoherent fibre-optic data transmission systems based on signal spectral coding with matched acousto-optical filters

Advanced spectral processing of broadband light using acousto-optic devices with arbitrary transmission functions

“…The sequence of sub-bands was coded with a binary quasirandom sequence. Such modulation of optical spectra is typical for OCDMA communication systems [7,8]. The RF signal providing binary encoded spectrum can be characterized as quasinoise though the trend for frequency modulation and the slope are the same as for a rectangular window without modulation.…”

“…Among them are the problems of designing femtosecond fiber lasers [1,2], spectral gain control in optical amplifiers [3,4,5], CARS spectroscopy [6], etc. Other applications that require synthesis or arbitrary spectral transmission functions are optical matched filtering for telecommunication systems [7,8], recognition of chemical compounds [9], etc. Spectral matching of the receiver's transmission window with the analyzed spectrum can be done to maximize signal-to-noise ratio [10].…”

Hyperspectral imaging acousto-optic system with spatial filtering for optical phase visualization

“…5,8 Recent developments in digital methods of arbitrary ultrasonic field synthesis can be useful for advanced spectral processing by means of AOTFs. 32,33 It is also known that image edge enhancement can be effectively performed by AOTFs with coherent object illumination. 11,[25][26][27][28][34][35][36] Using the peculiarities of the AOTF transfer function for visualization of phase objects has been proposed and studied by Balakshy et al [26][27][28]34 It has been shown that, unlike the darkfield and the phase-contrast methods, acousto-optic filtering results in intensity at the image plane proportional to the optical phase gradient in the object.…”

Dispersive Controlling of Femtosecond Laser Radiation: New Opportunities and Developments

“…The further development of dispersive technique was made by Molchanov [11] for CPA and OCPCA laser systems. Nowadays the dispersive acoustooptical methods are demanded in design of femtosecond ber lasers [12] and optical ampliers [11], adaptive spectroscopy, telecommunications [13], etc.…”