Terahertz wave generating apparatus using dual mode laser

A terahertz wave generating apparatus comprising:

• a dual mode laser including a first single mode laser configured to generate a first beating signal, a gain adjustment region configured to modulate the first beating signal, and a second single mode laser configured to generate a second beating signal;
• a semiconductor optical amplifier configured to amplify the modulated first beating signal and the second beating signal;
• and
• a photomixer configured to mix the modulated first beating signal and the second beating signal which are amplified from the semiconductor optical amplifier, and to modulate a current supplied based on a beating frequency of the mixed first beating signal and second beating signal to generate a terahertz wave signal, and
• wherein the gain adjustment region is formed between the first single mode laser and the second single mode laser, and
• wherein the first beating signal is output from the first single mode laser to the gain adjustment region and is modulated based on a reverse bias voltage supplied to the gain adjustment region.