Observation of regular pulse train in a narrow-band optoelectronic oscillator

We have experimentally observed a new operating state of a regular pulse train in a narrow-band optoelectronic oscillator (OEO) system, where the direct-current (DC) bias of the Mach-Zehnder modulator is set at the maximum value of the transmission transfer function instead of the usual quadrature p...

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Bibliographic Details
Published in:Optoelectronics letters 2024-02, Vol.20 (2), p.94-99
Main Authors: Zhao, Chunbo, Tuo, Zhuoyue, Yao, Jiali, He, Yuling, Zhai, Shenghua, Meng, Yansong
Format: Article
Language:English
Subjects:
Lasers
Mach-Zehnder interferometers
Nonlinearity
Optical Devices
Optics
Optoelectronics
Oscillators
Photonics
Physics
Physics and Astronomy
Quadratures
Transfer functions
Waveforms
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Summary:We have experimentally observed a new operating state of a regular pulse train in a narrow-band optoelectronic oscillator (OEO) system, where the direct-current (DC) bias of the Mach-Zehnder modulator is set at the maximum value of the transmission transfer function instead of the usual quadrature point. The observed quasi-steady-state pulse train is distinctly periodic, with a period of 10.5 µs and a center frequency of 10 GHz, and resembles a mode-locked OEO in its waveform. The formation of regular pulses here may arise from the dynamic balance of nonlinearity and narrow-band filter effects, with the transient characteristics of the pulses arising mainly from instabilities between the gain and cavity loss. Our results are of great importance for deepening the understanding of the nonlinear dynamical processes in OEO systems.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-024-3108-3