Acousto-Optic System For The Generation And Control Of Tunable Low-Frequency Signals

    Authors

    N. A. Riza;M. M. K. Howlader

    Comments

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    Abbreviated Journal Title

    Opt. Eng.

    Keywords

    acousto-optics; phased arrays; low frequency; ultrasonic signals; control; Optics

    Abstract

    An optically efficient interferometric acousto-optic architecture for the tunable generation and control of low-frequency signals is proposed using two radio frequency (rf) or microwave band Bragg cells in an in-line configuration, Critical beam deflection optics, such as a dove prism, ensure that the interfering beams are collinear and stationary, thus providing the high heterodyning efficiency required at the fixed optical detector. Tunable 1- to 15-MHz ultrasonic band signal generation is demonstrated with rf Bragg cells, showing high (107 dB/Hz) carrier-to-noise ratios. This free-space interferometric acousto-optic system with two collinear output beams with a relative color shift is required for making a compact, lightweight, and powerful optical platform for baseband/low-frequency optical signal processing and control functions, such as required in advanced phased-array systems used in sonar, medical, and industrial applications. (C) 1996 Society of Photo-Optical Instrumentation Engineers.

    Journal Title

    Optical Engineering

    Volume

    35

    Issue/Number

    4

    Publication Date

    1-1-1996

    Document Type

    Article

    Language

    English

    First Page

    920

    Last Page

    925

    WOS Identifier

    WOS:A1996UE92000002

    ISSN

    0091-3286

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