Optical Single-Sideband Modulation Using a Fiber-Bragg-Grating-Based Optical Hilbert Transformer

Author

Li, Ze ; Chi, Hao ; Zhang, Xianmin ; Yao, Jianping

Author_Institution

Microwave Photonics Res. Lab., Univ. of Ottawa, Ottawa, ON, Canada

Volume

23

Issue

9

fYear

2011

fDate

5/1/2011 12:00:00 AM

Firstpage

558

Lastpage

560

Abstract

An all-optical approach to realizing optical single-sideband (OSSB) modulation based on optical Hilbert transform implemented using a fiber Bragg grating (FBG) is proposed and demonstrated. In the proposed approach, an optical double-sideband (ODSB) signal is divided equally into two channels with the output at one channel being the in-phase (I) component and that at the other being the quadrature phase (Q) component. An FBG-based optical Hilbert transformer (HT) is incorporated in the Q channel, making the two sidebands out of phase at the output of the HT. The combination of the two optical signals from the two channels leads to the cancellation of one sideband, thus an OSSB signal is generated. An experiment is performed. An OSSB signal with a frequency from 6 to 15 GHz and a sideband suppression ratio (SSR) as large as 20 dB is generated. The transmission of the OSSB signal over a single-mode fiber of 45.6 km is also studied.

Keywords

Bragg gratings; Hilbert transforms; optical communication equipment; optical fibre communication; optical fibres; optical modulation; telecommunication channels; FBG; ODSB; OSSB; Q channel; distance 45.6 km; fiber Bragg grating; frequency 6 GHz to 15 GHz; optical Hilbert transform; optical double-sideband; optical single-sideband modulation; quadrature phase; sideband suppression ratio; single-mode fiber; Amplitude modulation; Optical fibers; Optical filters; Optical modulation; Optical signal processing; Chromatic dispersion; Hilbert transform; microwave photonics; optical signal processing; optical single-sideband (OSSB) modulation;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2011.2116114

Filename

5714714