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Published in:
2020 | OriginalPaper | Chapter
Dynamic Range Improvement of Broad-Band Analog Fiber Optic Links with Special Lithium Niobate Integrated Optical Modulators
Authors : Aleksei Petrov, Mikhail Parfenov, Vladimir Lebedev, Igor Ilichev, Peter Agruzov, Aleksandr Tronev, Aleksandr Shamrai
Published in: Internet of Things, Smart Spaces, and Next Generation Networks and Systems
Publisher: Springer International Publishing
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Abstract
Two different approaches for dynamic range improvement of broad band analog fiber optic link were considered. They are based on the special lithium niobate modulators which was stabilized in specific working points. The first approach is the laser intensity noise suppression with dual output Mach-Zehnder modulator and balanced photodetector. The high noise suppression was achieved by precise balancing using modulator working point selection and stabilization as well as optical path adjustment. The second approach use a directional coupler modulator which was set to the specific working point corresponding to the minimum of third harmonic and linearized modulation. The requirements to characteristics of the modulators and working point stabilization systems were determined. Experimental demonstration and comparison two types of the photonic links were carried out. The spurries free dynamic range higher than 110 dB/Hz2/3 in 3 GHz spectral band was achieved.