Energy-saving technology in the design of green laser pointer

Edit this section works as a crystal diode p-type semiconductor and n-type semiconductor pn junction formed at the interface at both sides of the formation of space charge layer, and has a self-built electric field of laser diodes. green laser pointer has the plug and play function.When there is no applied voltage, due to the pn junction on both sides of the carrier concentration due to poor self diffusion current and electric field-induced drift currents equal in power balance. When the outside world has a positive voltage bias, the external electric field and the mutual self-built electric field cancellation effect suppressing the spread of the carrier caused the current increase in forward current. green laser pointer has the plug and play function that people can use it without installing any other procedures.When the outside world when the reverse bias voltage, the external electric field and to further strengthen the self-built electric field formed within a certain range of reverse voltage and reverse bias voltage independent of the reverse saturation current I0. When a high reverse voltage applied to a certain extent, pn junction space-charge layer in the electric field strength reaches a critical value produce carrier multiplication process, resulting in a large number of electron-hole pairs, resulting in a large reverse breakdown current values , called the diode breakdown phenomenon.The green laser pointer applies to all computers with USB port. Edit this paragraph the most important electrical properties of the diode characteristic is one-way conductivity. In the circuit, current can only flow from the diode cathode, anode flow. Following through the laser diode in a simple experiment shows the forward characteristics and reverse diode characteristics. 1 positive features in the electronic circuit, the diode cathode connected to the high potential side, the cathode connected to the low potential side, the diode will turn on, this connection is called forward bias. Have demonstrated that when added to the forward voltage across the diode is very small, still can not turn the diode, the diode forward current flowing through very weak. The green laser pointer applies RF technology to resolve the original directivity problem of infrared ray.Only when the forward voltage reaches a certain value (this value is called the "threshold voltage" germanium tube is about 0.2V, silicon tube approximately 0.6V) after the diode is conducting in order to direct. After conducting the voltage across the diode remained essentially unchanged (germanium tube is about 0.3V, silicon tube is about 0.7V), known as the diode's "forward voltage drop." 2 ? reverse features in the electronic circuit, the diode cathode connected to the low potential side, the negative pole in the high potential side, when the diode is almost no current flows, when the diode is off, this connection is called reverse bias. Diode is reverse biased, there will still be weak reverse current through the diode, known as leakage current. green laser pointer has the interference-proof function.When the reverse voltage across the diode increases to a certain value, the reverse current increases dramatically, the diode will lose one-way electrical properties, this state is called the diode breakdown. Laser diode injection current must be greater than the critical current density, in order to meet the living conditions of issue of the amount of reverse laser. Critical current density and junction temperature, and the indirect effects of efficiency. High-temperature operation, the critical current increased efficiency to reduce, or even damage the components.