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Advantages of VCSEL Lasers

VCSEL lasers have the economic advantage over any other diode lasers. This short explanation tells you why.

A typical VCSEL consists of two oppositely-doped Distributed Bragg Reflectors (DBR) with a cavity layer between. In the center of the cavity layer resides an active region, consisting of multiple quantum wells. Current is injected into the active region via a current guiding structure either provided by an oxide aperture or proton-implanted surroundings.

As the entire cavity can be grown with one-step epitaxy, these lasers can be manufactured and tested on a wafer scale. This presents a significant manufacturing advantage.

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