Phase measurement of laser diode array radiation

Abstract

The phase of either near-field or far-field distribution function of laser diode arrays can be measured by using the technique of shearing interferometry. Two generations of shearing interferometers are described and typical results using them are shown. For one gain-guided laser array the phase of the near-field distribution is shown to be a periodic function whose period is twice the distance between stripes. An example of phase measurement of the far-field distribution is shown.