文档介绍：Hilbert Phase Analysis of the Dynamics of a Semiconductor Laser with Optical
Feedback
Wing-Shun Lam1,2, Parvez N. Guzdar2, and Rajarshi Roy1,2,3
1Department of Physics, University of Maryland, College Park, Maryland, 20742
2IREAP, University of Maryland, College Park, Maryland 20742 and
3IPST, University of Maryland, College Park, Maryland 20742
(Dated: October 21, 2002)
The nonlinear dynamics of a semiconductor laser with optical feedback is studied using a novel
method of analytic signal processing. The Hilbert transform of the real intensity signal reveals
interesting facets of the nonlinear dynamical behavior, including the formation and interaction of
external cavity modes with increasing external feedback. Here we report measurements on two
illustrative cases with very different dynamics; the laser is first biased just near threshold, and then
far above threshold. We observe 2π phase jumps at intervals that are multiples of the external cavity
round trip time, indicating the interaction and transfer of energy between external cavity modes.
PACS numbers: , , ,
A semiconductor laser with time-delayed optical feed- sity, we can get the corresponding analytic signal I(t)=
(r) (i) (i) −1 ∞(r) 0 0
back is one of the most interesting nonlinear dynami- I (t)+iI (t), where I ≡π P R−∞ I (t )(t −
cal systems in which t