All-optical modulator apparatus based on black phosphorus

Abstract

The invention discloses an all-optical modulator apparatus based on black phosphorus. The apparatus includes a pumped laser source, a direct current continuous laser source, a reflector, a dichroic laser beam combiner, a convex lens, a micro nano optical fiber, the black phosphorus, and a bandpass optical filter. The black phosphorus of the invention has good saturated absorption characteristic of spectra from visible light to near infrared light, and can work in a broadband spectrum range. The all-optical modulator apparatus based on the black phosphorus employs the all-optical modulation, overcomes the problem of modulation speed bottleneck of the electro-optical modulation, and has the advantages of the fast optical modulation speed, the low power consumption, the high modulation depth, and compatibility with an optical fiber system.

Description

technical field [0001] The invention belongs to the technical field of optoelectronics, and in particular relates to an all-optical modulator device based on black phosphorus. Background technique [0002] The optical modulator is the basis and key component of the optical communication system. Its function is to change the intensity, phase, polarization and other characteristics of the optical carrier passing through the optical modulator, and load the electrical signal on the optical carrier. [0003] In recent years, two-dimensional crystal materials have become a new research direction of semiconductor materials due to their excellent optical and electrical properties. Following graphene and molybdenum disulfide, the research group of Professor Zhang Yuanbo from the Department of Physics of Fudan University discovered a new type of two-dimensional semiconductor material - black phosphorus. Black phosphorus is a two-dimensional phosphorus atom monolayer with a folded hon...

AI Technical Summary

Problems solved by technology

[0004] Most of the current optical modulators are electro-optic modulators, and their main working principle is to change the characteristics of the optical carrier intensity, phase, and polarization passing through the modulator, and load the electrical signal on the optical carrier; however, the electro-optic modulator is limited by the electronic Bottleneck, it is difficult to continue to increase the modulation rate, so the researchers proposed all-optical modulation

Images