A novel experimental apparatus to record the near-field intensity distribution on the output facet of a laser diode along with the capability of displaying both the near- and far-field patterns is described. The overall optical magnification is 375 and the recorded near-field distribution is limited to a resolution of about 0.5,µm on the mirror face, primarily as a result of diffraction. Also described here is a device to record far-field distribution to 0.5° accuracy. With the aid of a calibrated photodiode, the output power vs peak current characteristics can also be recorded.
© 1980 Optical Society Of America
Shimon Peled, "Near- and far-field characterization of diode lasers," Appl. Opt. 19, 324-328 (1980)