Spectrally Resolved Near-Field Intensity Measurements from Gain-Guided Twin-Stripe Laser Diode Arrays

摘要

Gain-guided twin-stripe laser diodes have been observed which exhibit two distinct sets of longitudinal modes, one corresponding to a single near-field intensity profile centered between the stripes and the other to a double-lobe near-field distribution centered under the stripes. A large spectral separation between these two sets of modes has also been measured. The double-lobe distribution probably results from a weak index guide, which occurs because of the decrease in the current density between stripes. The spectral separation between these two near-field modes is believed to be due to band filling. (RH)