Photonic Generation and Transmission of Frequency-Doubled Triangular and Square Waveforms Based on Two Mach-Zehnder Modulators and a Sagnac Loop

In this paper, a new photonic approach for frequency-doubled triangular and square waveforms generation is proposed and experimentally demonstrated. The scheme is based on two single-drive Mach-Zehnder modulators (MZMs) and one of them is located in a Sagnac loop. By properly setting the working poi...

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Bibliographic Details
Published inJournal of lightwave technology Vol. 37; no. 9; pp. 1937 - 1945
Main Authors Zhai, Weile, Wen, Aijun, Shan, Dongjuan
Format Journal Article
LanguageEnglish
Published New York IEEE 01.05.2019
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Amplitude modulation
Amplitudes
arbitrary waveform generation
chromatic dispersion
frequency-doubled
Harmonics
Mach-Zehnder interferometers
Mach-Zehnder modulator
Microwave photonics
Modulators
Optical communication
Optical fiber dispersion
Optical fiber polarization
Optical modulation
Optical polarization
Photoelectricity
Photonics
radio over fiber system
Sagnac loop
Sidebands
Waveforms
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Summary:In this paper, a new photonic approach for frequency-doubled triangular and square waveforms generation is proposed and experimentally demonstrated. The scheme is based on two single-drive Mach-Zehnder modulators (MZMs) and one of them is located in a Sagnac loop. By properly setting the working points of the two MZMs and the polarization angle of the light injected into the Sagnac loop, two orthogonal-polarization optical signals with tunable amplitudes can be obtained. One of them is the carrier-suppressed first-order optical sidebands and the other is the carrier-suppressed third-order optical sidebands. After the photoelectric conversion, we can get frequency-doubled and frequency-sextupled microwave harmonics with tunable amplitudes and the desired waveforms can be obtained. In addition, the phase relationship and the amplitude of the generated second- and sixth-order electrical harmonics will remain unchanged during fiber transmission. Thus, the scheme is suitable for fiber transmission in future centralized radio-over-fiber systems.
ISSN:0733-8724
1558-2213
DOI:10.1109/JLT.2019.2895844