Wireless optical communication system based on tunable VCSEL (vertical cavity surface emitting laser)

Abstract

The embodiment of the invention discloses a wireless optical communication system based on a tunable VCSEL (vertical cavity surface emitting laser), and the system comprises a signal transmitting endand a signal receiving end. The signal transmitting end comprises a tunable VCSEL array and a first optical module, and is set to control the tunable VCSEL array to emit a corresponding laser signal according to an externally inputted electric communication signal, concentrates the laser signal through the first optical module as an optical communication signal and outputs the optical communication signal output to a free space, wherein the optical communication signal includes light of multiple wavelengths. The signal receiving end includes a second optical module, a photoelectric detector and a signal output module, is set to acquire the optical communication signal in the free space through the second optical module, transmits the optical communication signal to the photoelectric detector, converts the optical signal into a current signal through the photoelectric detector, performs the amplification, shaping and filtering of the current signal through a signal output module and then outputs the current signal. According to the technical scheme of the embodiment of the invention, the system can improve the rate and channel capacity of optical communication.

Description

technical field [0001] Embodiments of the present invention relate to optical communication technology, and in particular to a wireless optical communication system based on a tunable VCSEL. Background technique [0002] The applications and services provided by current wireless networks and wireless devices have fundamentally changed the way we live, work and socialize. In the future development of wireless communication, the lack of spectrum resources will become the biggest bottleneck restricting the development of wireless communication. [0003] Wireless optical communication is a candidate technology for high-speed wireless communication, and it will be a powerful supplement to existing microwave radio frequency communication. With the rise of short-distance wireless communication and the maturity of new light-emitting diode devices at the beginning of this century, wireless optical communication has formed a new application of short-distance wireless optical communic...

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Problems solved by technology

[0004] However, the inventor found during the research and development process that when using commercial RGB LEDs to construct a wavelength division multiplexing wireless optical communication system, there can only be three wavelengths of the light source wavelengths at the transmitting end, and the three wavelengths are far apart in the spectrum. To make better use of spectrum resources, the transmission rate and channel capacity of the constructed free-space wavelength division multiplexing system are relatively low

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