Laser Diode Bar Soldering

My guide on how to solder to all of the laser diodes you remove from dvd burners.

Laser diode bar soldering.

Suzanne jenniches patented laser soldering in 1980. Soldering iron hot bar thermode and diode laser best fit choice. The wavelength of these lasers are typically in the near ir and are suitable for laser soldering and plastic welding. 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.

For further details please contact email. Wavelengths are typically 808 nm through 980 nm. Diode laser the beam of the laser diodes is at first collimated in one axis by a cylinder lense. Laser soldering is a technique where a 30 50 w laser is used to melt and solder an electrical connection joint.

Recent innovations to increase the power and beam quality has opened new opportunities in micro joining processes. 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. Four gold plated brass connector pins molded in plastic. Direct diode lasers ddls use the light from diodes without further amplification in fibers or crystals.

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. Solder free laser bar mounting while soldered bars present a serie of problems as thermal expansion mismatch high temperature process fatigue effect with consequient lifetime reduction our clamping technology overcomes all of these troubles thanks to the total elimination of the soldering process. 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. Diode laser example 2.

In a second step the beam is coupled into the fiber by special optics. This video shows typical pcb soldering with 20 30w fiber coupled diode laser. High soldering quality needs a laser spot with a precise round shape and constant intensity. Diode laser systems based on semiconductor junctions are used for this purpose.

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.