Title

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

Keywords

Acousto-optics; Control; Low frequency; Phased arrays; Ultrasonic signals

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. ©1996 Society of Photo-Optical Instrumentation Engineers.

Publication Date

1-1-1996

Publication Title

Optical Engineering

Volume

35

Issue

4

Number of Pages

920-925

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1117/1.600701

Socpus ID

4243064810 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/4243064810

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