Chl. Quay et al., Coherence collapse and redshifting in vertical-cavity surface-emitting lasers exposed to strong optical feedback, J APPL PHYS, 90(12), 2001, pp. 5856-5858
The response of a commercial-grade, single-mode vertical-cavity surface-emi
tting laser to very strong optical feedback is investigated. With increasin
g feedback magnitude, the lasing spectrum broadens dramatically, eventually
resulting in coherence collapse, and the lasing peak shifts to longer wave
lengths. These effects became less severe with the onset of higher-order mo
des. A theoretical model is provided to explain the redshifting of the lasi
ng spectrum with feedback. (C) 2001 American Institute of Physics.