Cascaded acousto-optical system for modulation of unpolarized light | Zendy

JeanClaude Kastelik | Zendy; Konstantin B. Yushkov | Zendy; Samuel Dupont | Zendy; V. B. Voloshinov | Zendy

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Cascaded acousto-optical system for modulation of unpolarized light

Author(s) -

JeanClaude Kastelik,

Konstantin B. Yushkov,

Samuel Dupont,

V. B. Voloshinov

Publication year - 2009

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.17.012767

Subject(s) - optics , optical power , physics , birefringence , attenuation , wavelength division multiplexing , intensity modulation , polarization (electrochemistry) , multiplexing , materials science , wavelength , optoelectronics , phase modulation , telecommunications , phase noise , computer science , laser , chemistry

A cascaded system of two acousto-optical cells is proposed for equalization of multichannel optical signal satisfying coarse wavelength-division multiplexing standard. Two similar acousto-optical modulators for unpolarized light on the basis of 10 degrees-cut paratellurite crystals were used in a free-space gap of a fiber line. The system controlled intensity of several optical carriers in the spectral range from 1200 to 1700 nm. The device was tested in a four-channel regime of operation in the range 1510-1570 nm. Overall optical insertion losses did not exceed -2 dB and less than 1 W electric power per channel was necessary for -20 dB intensity attenuation of the signal in a continuous operation mode. Compensation for birefringence in paratellurite provided diffraction regime that was insensitive to polarization of light. Interchannel crosstalk was less than -10 dB.

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