When working to improve laser equipment performance, most designers focus on components such as laser diodes, optical systems, and temperature control mechanisms. However, when output stability, wavelength accuracy, or control precision fall short of expectations, an often-overlooked factor may be power supply noise.

Lasers used in semiconductor manufacturing and inspection equipment are critical components that enable precision processing and high-accuracy measurement. In these applications, even small amounts of power supply noise can negatively affect processing quality and measurement accuracy.

Laser diodes are also sensitive to temperature changes. Therefore, the Peltier elements and control circuits used for temperature regulation require stable, low-noise power supplies.

In addition, driver circuits for piezoelectric actuators used for precise beam positioning and focus control can also be affected by power quality.

To maximize the performance of a laser system, attention must be paid not only to the laser source and optical components, but also to the power supplies that support them.

Daitron's low-noise power supplies deliver noise performance comparable to that of linear power supplies while maintaining the advantages of switching power supplies.  They are widely used by semiconductor equipment manufacturers in applications requiring exceptional stability and high S/N performance, including laser diode driver circuits, TEC control circuits, and piezo actuator driver circuits.

Benefits of Low-Noise Power Supplies

• Improved laser wavelength and output stability
• Enhanced measurement accuracy through improved S/N performance
•  Improved wavelength stability through temperature control
•  Improved control precision