Impact of initial chirp on nonlinear optical loop mirror switches in switching solitons
The effect of linear frequency chirp on nonlinear optical loop mirror (NOLM) for switching solitons is studied. It shows that the initial chirp in the control pulse not only affects the switching efficiency and switching contrast, but also alters the shape of the transmitted pulse. The effect of the...
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Veröffentlicht in: | Optics communications 2001-12, Vol.199 (5), p.361-368 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The effect of linear frequency chirp on nonlinear optical loop mirror (NOLM) for switching solitons is studied. It shows that the initial chirp in the control pulse not only affects the switching efficiency and switching contrast, but also alters the shape of the transmitted pulse. The effect of the initial chirp on the switching characteristic depends on the operating parameters of the NOLM. In our examples where the loop length is one soliton period, it is shown that the positive initial chirp can enhance the switching efficiency and switching contrast of the NOLM switches. Nevertheless, the initial chirped control pulses would broaden, which may lead cross-talk to the switched pulses and limit the operating bit rate of the NOLM. The initial negative chirp in the control can degrade not only the switching efficiency and switching contrast of the NOLM, but also the quality of the transmitted signal. |
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ISSN: | 0030-4018 1873-0310 |
DOI: | 10.1016/S0030-4018(01)01571-1 |