Introduction of 457nm Nd YVO4 laser for optical communication
Lasers with a wavelength of 457nm are used in underwater blue-ray fuze communication and fuze target identification The 457nm laser employs a semiconductor-pumped frequency doubling method. The 457nm blue laser has a deeper color than the 473nm blue laser, and acousto-optic Q-switching can provide a short pulse with a high repetition rate and power. It is critical to design an underwater intelligent weapon communication system. Theory of 457nm Nd YVO4 laser AO-Q switch ： TeO 2 1064nm antireflection film is deposited on both ends. The acousto-optic Q-switch element is placed near the Nd:YVO4 crystal, and the temperature control and refrigeration are controlled by the semiconductor cooler. Nd:YVO 4 crystal LBO Frequency conversion TEC1 and TEC2——TEC1 and TEC2 perform double-channel refrigeration on LD and Nd:YVO4, and refrigerating by fine-tuning semiconductor refrigerators to preventing laser threshold from rising. The precision of temperature control is 0.02...