Comment on: “Impact of modulated multiple optical feedback time delays on laser diode chaos synchronization” [Opt. Commun. 282 (2009) 3568]

Abstract Synchronization between laser diodes subject to multiple incoherent, delayed, optical feedback has been recently investigated [Shahverdiev, Shore, Opt. Commun. 282 (2009) 3568] through numerical simulations. Here, I explain that the model that was proposed and used is not suitable when the lasers are subject to multiple feedbacks of this kind.

[1]  Chaotic dynamics in semiconductor lasers subjected to polarization-rotated optical feedback , 2008 .

[2]  Niloy K. Dutta,et al.  Long wavelength semiconductor lasers , 1988, Technical Digest., International Electron Devices Meeting.

[3]  Tsu-Chiang Yen,et al.  High-frequency optical signal generation in a semiconductor laser by incoherent optical feedback , 1998 .

[4]  A Locquet,et al.  Secure communication scheme using chaotic laser diodes subject to incoherent optical feedback and incoherent optical injection. , 2001, Optics letters.

[5]  R. Lang,et al.  Injection locking properties of a semiconductor laser , 1982 .

[6]  P.S. Spencer,et al.  Dynamic regimes in semiconductor lasers subject to incoherent optical feedback , 2005, Journal of Lightwave Technology.

[7]  Patrice Mégret,et al.  Anticipating synchronization of two chaotic laser diodes by incoherent optical coupling and its application to secure communications , 2002 .

[8]  K. A. Shore,et al.  Impact of modulated multiple optical feedback time delays on laser diode chaos synchronization. , 2009 .

[9]  C. Henry.  Theory of the linewidth of semiconductor lasers , 1982 .

[10]  Linewidth reduction and optical frequency stabilization of a distributed feedback laser by incoherent optical negative feedback , 1988 .

[11]  Atsushi Uchida,et al.  TE-TM dynamics in a semiconductor laser subject to polarization-rotated optical feedback , 2003 .

[12]  Athanasios Gavrielides,et al.  Experimental synchronization of chaos in diode lasers with polarization-rotated feedback and injection. , 2004, Optics letters.

[13]  Yuzo Yoshikuni,et al.  FM noise and spectral linewidth reduction by incoherent optical negative feedback , 1991 .

[14]  R. Lang,et al.  External optical feedback effects on semiconductor injection laser properties , 1980 .

[15]  Thomas Erneux,et al.  Polarization dynamics in semiconductor lasers with incoherent optical feedback , 2005, SPIE OPTO.

[16]  K. Otsuka,et al.  Coexistence of two attractors in lasers with delayed incoherent optical feedback , 1993 .