Abstract

Delay-induced complex dynamics in lasers have been investigated in various schemes, such as rich phenomena, in semiconductor lasers with external feedback,¹ and quasiperiodicity in CO₂ lasers with electro-optic feedback.² Recently, we proposed high-speed picosecond pulse generation in semiconductor lasers with incoherent delayed feedback.³ The basic idea was derived from successive carrier modulation by delayed feedback light whose polarization direction is rotated to be orthogonal to the lasing light. Such a feedback scheme is referred to as incoherent feedback.⁴ We showed theoretically that periodic spiking oscillations can be excited in a short-delay regime, i. e., delay time ≪ carrier lifetime. In this paper, we extend this scheme to general class-B lasers and investigate dynamics in wide parameter regions.

© 1992 Optical Society of America