By E. Wolf (Ed.)
Hardbound. This quantity comprises 5 articles proposing stories of numerous themes of present examine that are prone to be of curiosity to many optical scientists and optical engineers. the 1st article, by way of J. Ohtsubo, offers with the dynamics of feedback-induced instability and chaos. The features of semiconductor lasers according to the speed equations, together with numerous laser buildings, are reviewed and the consequences of optical suggestions in semiconductor lasers are then mentioned. within the moment article, by means of F.G. Omenetto, the growth made in recent times within the basic zone of the nonlinear interplay of ultrafast pulses with optical and photonic crystal fibers are mentioned. specifically, ultrafast pulse measurements, pulse shaping and pulse regulate are mentioned. the subsequent article, by means of A.B. Shvartsburg and G. Petite, offers a assessment of brief optical phenomena that ensue within the spatial-temporal dynamics of ultrashort pulses. The interaction
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Sample text
The phase mismatch, is introduced and the system shows somewhat different dynamics compared with the case of degenerate four-wave mixing (van Tartwijk, van der Linden and Lenstra [ 1992], Gray, Huang and Agrawal [1994]). Another issue in phase-conjugate feedback is the time response of a phase-conjugate mirror. As the time scale of the dynamics in a semiconductor laser with optical feedback is usually a nanosecond or faster, the effect of finite time must be considered in the dynamics for a phase-conjugate mirror with a slow time response (DeTienne, Gray, Agrawal and Lenstra [ 1997], van der Graaf, Pesquera and Lenstra [ 1998]).
It is a well-known fact that the laser oscillation is stable for a higher bias injection current. Therefore, a larger optical feedback strength may be required to destabilize the laser at a higher bias injection current. 5. 5. The typical features of LFFs are sudden power drops and gradual power recovery processes. 50 I I ' ' I 51 | ' -. - .. ~ ~" 9 .. (a) 9 9. '.... " 9 9 -.... -" -; .. =.. 9 . - .. es ... , . . ' . - 9, .. 30 m~ , I . g. = -- . ~D 9 m - 9 ~, :, :r ,~ 4. ,.. ,. ,='i" '". " ~ ' ,~ .
The dynamics of phase-conjugate feedback are theoretically described by eqs. 45). The effects of phase-conjugate feedback are quite different from those for conventional optical feedback. One difference is the stability enhancement in the phase space of the external reflectivity and the external mirror position. The stability condition for phase-conjugate feedback is also calculated from the linear stability analysis and is given by (Murakami, Ohtsubo and Liu [1997]) - = - Tin + 2 a ) - - COS2q~s tan(89~or).
