Artificial diamond plasma production device

An artificial diamond plasma production device comprising:

• a reaction chamber being hollow and having
• a microwave window disposed on the reaction chamber such that an external microwave is capable of traveling into the reaction chamber via the microwave window;
• a diamond holder disposed in the reaction chamber, wherein an imaginary focus region is defined on the diamond holder;
• a microwave emitting module disposed outside of the reaction chamber and emitting a circularly-polarized microwave toward the microwave window of the reaction chamber;
• the microwave emitting module having a polarizing tube, a directing tube, a first waveguide, and a first linearly-polarized microwave source that are serially connected;
• the microwave emitting module further having a second waveguide and a first matched load;
• wherein
• the polarizing tube has
• a circular polarization opening disposed on an end of the polarizing tube and facing toward the microwave window of the reaction chamber;
• and
• a linear polarization opening disposed on another end of the polarizing tube;
• wherein when an external linearly-polarized microwave enters the polarizing tube via the linear polarization opening, said external linearly-polarized microwave is converted into a circularly-polarized microwave and exits via the circular polarization opening;
• when an external circularly-polarized microwave enters the polarizing tube via the circular polarization opening, said external circularly-polarized microwave is converted into a linearly-polarized microwave and exits via the linear polarization opening;
• the directing tube has:
• a main opening disposed on an end of the directing tube and connected to the linear polarization opening of the polarizing tube;
• a first opening;
• and
• a second opening disposed on a sidewall of the directing tube;
• an opening direction toward which the second opening faces being non-parallel to an opening direction toward which the first opening faces;
• an end of the first waveguide is connected to the first opening of the directing tube;
• another end of the first waveguide is connected to the first linearly-polarized microwave source;
• the first linearly-polarized microwave source generates a linearly-polarized microwave;
• said linearly-polarized microwave is converted into a circularly-polarized microwave by the polarizing tube and is emitted toward the microwave window of the reaction chamber via the circular polarization opening of the polarizing tube;
• an end of the second waveguide is connected to the second opening of the directing tube;
• and
• the first matched load is mounted on the second waveguide;
• and
• a microwave lens is disposed between the circular polarization opening of the polarizing tube of the microwave emitting module and the diamond holder of the reaction chamber;
• the microwave lens converging the circularly-polarized microwave emitted by the microwave emitting module to the focus region of the diamond holder.