We all know that there are many types of laser diode packaging. Today, Xiaobian will tell you the difference between plastic laser diode and gold laser diode. I hope it will help you.

Plastic packaging is a resin-coated chip.

Gold seal is a metal shell, glass or Shi Ying window protection chip.

So what's the difference between them? Let's take a look at it together.

Different heat dissipation capacity

The heat dissipation of plastic packaging mainly depends on PCB and air. As long as the chip temperature climbs, the optical power will drop and the wavelength will drift.

The gold seal is different. It is a metal shell itself, and the heat can be directly conducted out. Coupled with the heat dissipation base and TEC temperature control, the stability is completely another gear immediately.

The service life difference is very obvious.

Under normal circumstances: 1,000 to 5,000 hours is not bad.

And the gold seal:

5,000 hours is the bottom line, and many can achieve more than 20,000 or even 50,000 hours.

When the equipment factory does the acceptance, the life is particularly sensitive, and the basic plastic packaging can't pass.

Optical performance and consistency

In most cases, the parameters of spot shape, power consistency and wavelength drift of plastic encapsulated lasers are not so standard, and the deviation of the same batch is quite large.

However, gold-sealed lasers can do grading, calibration, window sealing and collimation, and some even have FAC and SAC optical structures, so the beam quality and directivity are very stable, which is very important, especially in measurement, medical treatment and communication.

cost variance

Needless to say, this is the most direct difference:

Plastic packaging a few dollars or even a few cents.

Gold seals are dozens to hundreds or even higher.

The above is the comparison between plastic sealed laser diode and gold sealed laser diode. If you still don't understand, please feel free to contact us.