High-speed LED optical-communication resonant-type modulator

Abstract

The invention discloses a high-speed LED optical-communication resonant-type modulator. The modulator comprises a power supply unit, a control unit, an inductor, a resistor, a capacitor, an LED, a switch K101 and a switch K103; when the K101 and the K103 are connected, the voltage-limiting constant-current control unit provides a forward power supply for the LED, the LED is quickly overshot and connected then, and the resonant capacitor performs energy storage through the resonant inductor; and, when the K103 is still connected, the K101 is disconnected, resonance is generated between the inductor and the capacitor, a reverse power supply is provided for the LED in an LED reverse recovery time, and then the LED is quickly and electrically disconnected. The modulator further comprises a K102; and, when the K102 is connected, and when the K101 and the K103 are disconnected, forward one-way discharging of the LED is performed further. The composite rate of carriers is improved, so the switch speed is greatly improved; disconnection is further accelerated through an auxiliary discharge pathway; and energy zone bending is reduced through time sequence control, and radiation recombination of the carriers is improved.

Description

technical field [0001] The invention relates to an LED optical communication modulator, in particular to a high-speed LED optical communication resonant modulator. Background technique [0002] Optical communication is to achieve ultra-high-speed optical switching rate, not the electrical high-speed switching in common circuits. The emphasis here is on the switching rate of light, not simply the switching rate of electrons or holes. Optical communication is used to supplement the shortcomings of wireless communication applications such as WIFI, and replace WIFI in some fields to become a new communication method. LED optical communication technology is a brand-new communication technology that has gradually developed in recent years. Many related technical researches are still in their infancy, especially in the technology of high-speed LED devices and high-speed switching circuits. The existing LEDs are connected in series with a switch for simple modulation. The disadvant...

AI Technical Summary

Problems solved by technology

The existing LEDs are connected in series with a switch for simple modulation. The disadvantages are that the switching speed is severely limited, the carrier recombination rate is not high, and the remaining carrier annihilation time is too long, which makes the optical communication effect very poor.

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