Continuously Tunable Microwave Frequency Multiplication by Optically Pumping Linearly Chirped Fiber Bragg Gratings in an Unbalanced Temporal Pulse Shaping System

Author

Shahoei, Hiva ; Yao, Jianping

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., Univ. of Ottawa, Ottawa, ON, Canada

Volume

30

Issue

12

fYear

2012

fDate

6/15/2012 12:00:00 AM

Firstpage

1954

Lastpage

1959

Abstract

We propose and demonstrate a new and simple method for achieving continuously tunable microwave frequency multiplication using an unbalanced temporal pulse shaping (TPS) system incorporating two linearly chirped fiber Bragg gratings (LCFBGs) written in erbium/ytterbium co-doped fibers. By optically pumping the LCFBGs with different pumping power, the dispersion of the LCFBGs is tuned. The incorporation of the LCFBGs in an unbalanced TPS system would enable the generation of a frequency tunable microwave waveform. The operation of the system is discussed which is then verified by an experiment. Continuously tunable microwave frequency multiplication with a multiplication factor from 5.14 to 11.9 is experimentally demonstrated. The impact of the ripples in the magnitude and group delay responses of the LCFBGs on the performance of the microwave generation is also studied.

Keywords

Bragg gratings; erbium; microwave generation; optical fibres; optical frequency conversion; optical pulse shaping; ytterbium; continuously tunable microwave frequency multiplication; group delay responses; linearly chirped fiber Bragg gratings; microwave generation; multiplication factor; optical pumping; unbalanced temporal pulse shaping system; Bandwidth; Delay; Erbium; Optical fiber dispersion; Optical pulses; Reflection; Frequency multiplication; linearly chirped fiber Bragg grating (LCFBG); real-time Fourier transform; temporal pulse shaping (TPS);

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2012.2190581

Filename

6175916