Laser Diode Bar Soldering

Wavelengths are typically 808 nm through 980 nm.

Laser diode bar soldering.

High spatial brightness w cm 2 sr is pursued in high power diode lasers when industrial applications like metal cutting drilling or soldering come into play. Four gold plated brass connector pins molded in plastic. These single emitter diodes do not exhibit the fatigue issues associated with bar diodes and as a result have much longer expected lifetimes in soldering systems than bar based systems. Soldering iron hot bar thermode and diode laser best fit choice.

High soldering quality needs a laser spot with a precise round shape and constant intensity. Suzanne jenniches patented laser soldering in 1980. Diode laser example 2. For fiber coupled diode lasers see figure this is perfectly the case.

To build an external resonator using a laser bar is an appealing strategy used mainly to increase power brightness or spectral brightness of the laser bar itself. This method has appeared in a couple of my videos but i d like to give it it s own video as its by far the best. Diode laser the beam of the laser diodes is at first collimated in one axis by a cylinder lense. Direct diode lasers ddls use the light from diodes without further amplification in fibers or crystals.

In a second step the beam is coupled into the fiber by special optics. My guide on how to solder to all of the laser diodes you remove from dvd burners. Cycled life test data for a jds uniphase industrial diode laser idl system shows that power decreases only one to three percent after 5300 hours of operation. The wavelength of these lasers are typically in the near ir and are suitable for laser soldering and plastic welding.

This video shows typical pcb soldering with 20 30w fiber coupled diode laser. For further details please contact email. Recent innovations to increase the power and beam quality has opened new opportunities in micro joining processes. Diode laser yes energy transmitted directly to solder paste which conducts heat to wire and silver thick film protecting glass from overheating and excessively long reflow cycle time.

The beam is delivered via an optical fiber.