A large dynamic range optical device measurement method and measurement system

Abstract

The invention discloses a large-dynamic-scope optical device measurement method and measurement system, and belongs to the technical field of optical device measurement and microwave photonics. According to the invention, an optical beam splitter is employed for equally dividing one optical single-sideband signal after transmission of an optical device to be measured into two signals, one signal is directly transmitted to one optical input port of a balance photoelectric detector, and the other signal, after passing through an optical Hilbert converter, is transmitted to the other input port of the balance photoelectric detector. In the balance photoelectric detector, residual sidebands are offset and needed sidebands are added together, such that measurement errors introduced by the residual sidebands can be eliminated, and the dynamic scope of the system is improved. The invention also discloses a large-dynamic-scope optical device measurement system. Compared to a conventional optical device spectrum response measurement technology, the method and system provided by the invention have the advantages of larger dynamic scope and lower common-mode noise.

Description

technical field [0001] The invention relates to a large dynamic range optical device measurement method and a measurement system, belonging to the technical fields of optical device measurement and microwave photonics. Background technique [0002] Multi-dimensional and high-precision optical device spectral analysis methods and instruments are also an inevitable requirement for the development of core photonic integrated chips and related frontier scientific research. On the one hand, advanced spectral analysis methods can help people dig deeper into the capabilities of integrated devices. As the basic unit of future optical integration, microresonators (microrings, microdisks, microspheres, etc.) are widely used in optical switches, quantum nondestructive measurement, high-precision sensing, microlasers, optical phase shifters, optical storage, nonlinear Optics, high-efficiency light modulation, single-molecule monitoring, etc., have been reported dozens of times in Natur...

AI Technical Summary

Problems solved by technology

However, the sideband suppression ratio of the optical SSB signal is limited, and the vestigial sideband will introduce measurement errors, making its dynamic range smaller

In addition, the conversion efficiency of photoelectric and electro-optical conversion is low, and the signal-to-noise ratio of the obtained microwave signal is low, so that the measurement results contain large common-mode noise

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