A comparison of ’’normal’’ lasers and lasers exhibiting light jumps

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Abstract
We have done a comparative examination of two sets of lasers, one set exhibiting a light jump and unusually low pulsation frequencies and another set of ’’normal’’ lasers which do not show these phenomena. Our characterization involved measurements of the near field and far field, the emission spectrum versus current, and the pulsation frequency versus current. These measurements did not reveal any major differences between the two types of lasers except that the pulsation frequencies tend to be lower when light jumps are present. In addition, the laser facets were stained with a dilute A/B etch and inspected with a scanning electron microscope. This showed that the distinction between the two types of lasers may be the position of the tail of the proton bombardment with respect to the active layer.

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