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

A wireless optical communication and optical signal technology, applied in the field of optical communication, can solve the problems of long distance, low transmission rate and channel capacity of free space wavelength division multiplexing system, and achieve the goal of increasing modulation bandwidth, transmission rate and channel capacity Effect

Inactive Publication Date: 2018-11-16
TSINGHUA BERKELEY SHENZHEN INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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

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Embodiment 1

[0036] figure 1 A schematic structural diagram of a wireless optical communication system based on a tunable VCSEL provided in Embodiment 1 of the present invention. This embodiment is applicable to free space optical communication. The wireless optical communication system based on a tunable VCSEL includes a signal transmitting end 110 and signal receiving end 120.

[0037] The signal transmitting end 110 includes a tunable VCSEL array 111 and a first optical component 112, configured to control the tunable VCSEL array 111 to emit a corresponding laser signal according to an externally input electrical communication signal, and converge the laser signal through the first optical component 112 as The optical communication signal is output to free space.

[0038] Wherein, the optical communication signal includes light of various wavelengths, since the signal transmitting end 110 is configured with a tunable VCSEL array 111, and the tunable VCSEL can output laser light of diff...

Embodiment 2

[0045] Figure 4 A schematic structural diagram of a tunable VCSEL-based wireless optical communication system provided by Embodiment 2 of the present invention. The technical solution of this embodiment is further refined on the basis of the above embodiments, as shown in Figure 4 As shown, optionally, the signal transmitting end 110 further includes: a control module 113 and a driving module 114 .

[0046] The control module 113 is connected to the tunable VCSEL array 111 and configured to control each VCSEL on the tunable VCSEL array 111 to emit light beams of different wavelengths.

[0047] The driving module 114 is connected to the tunable VCSEL array 111 and configured to control the working state of each VCSEL on the tunable VCSEL array 111 . Wherein, the working state of the VCSEL includes emitting laser light and stopping emitting laser light. The VCSELs on the tunable VCSEL array 111 are controlled by the control module 113 to emit light beams of different wavelen...

Embodiment 3

[0056] Figure 5 A schematic structural diagram of a wireless optical communication system based on a tunable VCSEL provided in Embodiment 3. The technical solution of this embodiment is further refined on the basis of the technical solutions provided above. The signal transmitting end 110 includes a tunable VCSEL array 111 and a first optical assembly 112. Optionally, the first optical assembly 112 includes a wavelength division multiplexer 1121, an optical power amplifier 1122, a pulse pattern generator 1123, a modulator 1124, a solution A wavelength division multiplexer 1125 , an optical switch set 1126 and a plurality of first acquisition, tracking and alignment ATP devices 1127 . Optionally, the optical power amplifier 1122 includes an erbium-doped fiber amplifier EDFA or a semiconductor optical amplifier SOA.

[0057] The wavelength division multiplexer 1121 is connected to the optical power amplifier 1122, and is configured to couple the received laser beam emitted by...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/116H04B10/50H04B10/67
CPCH04B10/116H04B10/503H04B10/67
Inventor 付红岩魏子贤关鸣悦
Owner TSINGHUA BERKELEY SHENZHEN INST
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