Broadband Chip-Based Source of Quantum Noise with Electrically Controllable Beam Splitter

The theory and practical realization of a broadband quantum-noise generator based on an original integrated optical beam splitter in the form Mach-Zehnder interferometer is demonstrated. with double output, made lithium niobate substrate, provides accurate electro-optical balancing homodyne detection circuit. experimentally obtained excess quantum noise over classical 12 dB frequency band 4 GHz, which best parameters generators known from literature.