Laser Diode Bar Soldering

Direct diode lasers ddls use the light from diodes without further amplification in fibers or crystals.

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. For fiber coupled diode lasers see figure this is perfectly the case. Diode laser the beam of the laser diodes is at first collimated in one axis by a cylinder lense. Soldering iron hot bar thermode and diode laser best fit choice.

This video shows typical pcb soldering with 20 30w fiber coupled diode laser. Diode laser systems based on semiconductor junctions are used for this purpose. Suzanne jenniches patented laser soldering in 1980. The beam is delivered via an optical fiber.

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. High soldering quality needs a laser spot with a precise round shape and constant intensity. In a second step the beam is coupled into the fiber by special optics.

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. The wavelength of these lasers are typically in the near ir and are suitable for laser soldering and plastic welding. Laser soldering is a technique where a 30 50 w laser is used to melt and solder an electrical connection joint. 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.

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. Diode laser example 2. Recent innovations to increase the power and beam quality has opened new opportunities in micro joining processes. 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.

Wavelengths are typically 808 nm through 980 nm.