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：TeO2

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:YVO4 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 ℃.

Feature

·        Small spot area

·        Good beam quality

·        Compact structure

·        long lifetime

·        Large photon energy

Application

·        High density data storage

·        Underwater communication

·        Marine resource detection

·        Underwater intelligent interactive communication system

Verdict

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