Baseband integrated acousto-optic frequency shifter/modulator module for fiber optic at 1.3 mu m

Author

Tsai, Chen S. ; Cheng, Zhe Y.

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., Irvine, CA, USA

Volume

40

Issue

4

fYear

1993

fDate

7/1/1993 12:00:00 AM

Firstpage

407

Lastpage

410

Abstract

A baseband integrated acoustooptic (AO) frequency shifter/modulator module that consists of a pair of titanium-indiffused proton-exchanged (TIPE) waveguide lenses and a pair of cascaded guided-wave AO Bragg cells has been realized in a Y-cut LiNbO/sub 3/ waveguide substrate 0.1 cm*1.0 cm*2.0 cm in size. A device module operating at the optical wavelength of 1.3 mu m has provided a -3-dB tunable bandwidth of 120 MHz at baseband. The frequency-shifted or -modulated light propagates in a fixed direction, irrespective of the magnitude of frequency shift or modulation, and is focused into a spot (FWHM) of 6.2- mu m size on the output edge of the waveguide. Accordingly, this optical frequency shifter/module can be directly interfaced with single-mode optical fibers to facilitate applications in fiber optic systems.<>

Keywords

acousto-optical devices; integrated optics; optical modulation; optical waveguides; 1.3 micron; 120 MHz; LiNbO/sub 3/ waveguide substrate; acousto-optic frequency shifter/modulator module; baseband integrated; cascaded guided wave Bragg cells; fiber optic; proton-exchanged waveguide lenses; Bandwidth; Baseband; Frequency modulation; Lenses; Optical diffraction; Optical fibers; Optical modulation; Optical propagation; Optical waveguides; Passband;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.251290

Filename

251290