High speed led optical communication modulator

Abstract

The invention discloses a high-speed LED optical communication modulator. The high-speed LED optical communication modulator comprises a control unit and a variable power supply unit; the variable power supply unit is an energy supply unit capable of switching in the positive and negative directions; the control unit generates switching and sequential control signals so that the variable power supply unit is driven to supply power to an LED; the sequential control signals are used for reducing the bending of an energy band via sequential control so that radiative recombination of carriers is improved; when the variable power supply supplies power in the positive direction, the LED is turned on, and the carriers are over-injected; and when the variable power supply supplies power in the reverse direction, the LED is turned off, and the carriers are injected in a reverse manner. The high-speed LED optical communication modulator also comprises a discharge circuit used for further accelerating the turn-off. According to the high-speed LED optical communication modulator, the over-injection of the carriers during turn-on and reverse injection of the carriers during turn-off are controlled so that the recombination rate of the carriers is increased, and the switching speed is greatly increased; the turn-off is further accelerated via the auxiliary discharge circuit; and the bending of the energy band is reduced via sequential control, and the radiative recombination of the carriers is improved.

Description

technical field [0001] The invention relates to an optical communication modulator, in particular to a high-speed LED optical communication modulator. Background technique [0002] Optical communication is to achieve ultra-high-speed optical switching rate, rather than high-speed switching in common circuits. The emphasis here is on the switching rate of light, not the switching rate of electrons or holes; optical communication is used to supplement wireless communication applications such as WIFI Insufficient, in some areas to replace WIFI has become a new way of communication. 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. LEDs are connected in series with a switch for simple modulation. The disadvantages are that the switching speed is severely li...

AI Technical Summary

Problems solved by technology

LED is connected in series with a switch for simple modulation. The disadvantage is 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.

Images