High speed led optical communication resonant modulator

Abstract

The invention discloses a high-speed LED optical communication resonant modulator, which includes a power supply unit, a control unit, an inductor, a resistor, a capacitor, an LED, a switch K101 and a switch K103; when K101 and K103 are turned on, the voltage limiting and constant current control unit Supply power to the LED in the forward direction, so that the LED is turned on quickly, and the resonant capacitor stores energy through the resonant inductor; when K103 is still on and K101 is off, the inductance and capacitor resonate, and the LED reverse recovery time To supply power, so that the LED fast electrical shutdown. It also includes K102. When K102 is turned on and K101 and K103 are turned off, the LED is further forwardly discharged in one direction. The invention improves the recombination rate of the carrier, so that the switching speed is greatly increased; the turn-off is further accelerated through the auxiliary discharge path; the bending of the energy band is reduced through the time sequence control, and the radiation recombination of the carrier 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. 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. Contents of the invention [0003] The technical problem to...

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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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