Abstract
The quality and degree of synchronization obtained between a chaotic master laser diode and a slave laser diode is usually assessed using a correlogram. This technique is known to accurately identify areas of good synchronization, but it is not able to elucidate why these regions exist. By using a complementary frequency domain technique, the response gain, we have been able to obtain further insight into the synchronization process. We show using numerical simulations that trends in synchronization quality evident in the injection-locking diagram are also present in the response gain. We also show that most of the spectral power is situated in a small band of frequencies close to the relaxation oscillation frequency of the master laser and that accurate reproduction of these frequency components in the slave laser is vital in achieving a good synchronization. We associate the variation in synchronization quality within the injection-locking regime to changes in the response gain profile induced by the optical injection from the master laser. Variations in the spectral profile of the response gain clearly delineate and explain the various regions seen in the correlation synchronization diagram.
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References
Ahlers, V., Parlitz, U., Lauterborn, W.: Hyperchaotic dynamics and synchronization of external-cavity semiconductor lasers. Phys. Rev. E 58(6), 7208–7213 (1998)
Argyris, A., Syvridis, D., Larger, L., Annovazzi-Lodi, V., Colet, P., Fischer, I., Garcfa-Ojalvo, J., Mirasso, C.R., Pesquera, L., Shore, K.A.: Chaos-based communications at high bit rates using commercial fibre-optic links. Nature 438, 343–346 (2005)
Cuomo, K.M., Oppenheim, A.V.: Circuit implementation of synchronized chaos with applications to communications. Phys. Rev. Lett. 71(1), 65–68 (1993)
Koryukin, I.V., Mandel, P.: Two regimes of synchronization in unidirectionally coupled semiconductor lasers. Phys. Rev. E 65(2), 026201 (2002)
Lang, R., Kobayashi, K.: External optical feedback effects on semiconductor injection properties. IEEE J. Quantum Electron. 16, 347–355 (1980)
Liu, Y., Davis, P., Takiguchi, Y., Aida, T., Saito, S., Liu, J.-M.: Injection locking and synchronization of periodic and chaotic signals in semiconductor lasers. IEEE J. Quantum Electron. 39, 269–277 (2003)
Locquet, A., Rogister, F., Sciamanna, M., Megret, P., Blondel, M.: Two types of synchronization regimes in unidirectionally coupled chaotic external-cavity semiconductor lasers. Phys. Rev. E 64, 045203 (2001)
Locquet, A., Masoller, C., Mirasso, C.R.: Synchronization regimes of optical-feedback-induced chaos in unidirectionally coupled semiconductor lasers. Phys. Rev. E 65(5), 056205 (2002)
Masoller, C.: Anticipation in synchronization of chaotic semiconductor lasers with optical feedback. Phys. Rev. Lett. 86, 2782–2785 (2001)
Murakami, A., Kawashima, K., Atsuki, K.: Cavity resonance shift and bandwidth enhancement in semiconductor lasers with strong light injection. IEEE J. Quantum Electron. 39, 1196–1204 (2003)
Ohtsubo, J.: Chaos synchronization and chaotic signal masking in semiconductor lasers with optical feedback. IEEE J. Quantum Electron. 38, 1141–1154 (2002)
Paul, J., Lee, M.W., Shore, K.A.: Effect of chaos pass filtering on message decoding quality using chaotic external-cavity laser diodes. Opt. Lett. 29, 2497–2499 (2004)
Peters-Flynn, S., Spencer, P.S., Sivaprakasam, S., Pierce, I., Shore, K.A.: Identification of the optimum time-delay for chaos synchronization regimes of semiconductor lasers. IEEE J. Quantum Electron. 42, 427–434 (2006)
Revuelta, J., Mirasso, C.R., Colet, P., Pesquera, L.: Criteria for synchronization of coupled chaotic external-cavity semiconductor lasers. IEEE Photonics Technol. Lett. 14, 140–142 (2002)
Shahverdiev, E.M., Shore, K.A.: Generalized synchronization in time-delayed systems. Phys. Rev. E 71, 016201 (2005)
Shahverdiev, E.M., Sivaprakasam, S., Shore, K.A.: Lag synchronization in time-delayed systems. Phys. Lett. A 292, 320–324 (2002)
Sivaprakasam, S., Shahverdiev, E.M., Spencer, P.S., Shore, K.A.: Experimental demonstration of anticipating synchronization in chaotic semiconductor lasers with optical feedback. Phys. Rev. Lett. 87(15), 154101 (2001)
VanWiggeren, G.D., Roy, R.: Optical communication with chaotic waveforms. Phys. Rev. Lett. 81(16), 3547–3550 (1998a)
VanWiggeren, G.D., Roy, R.: Communication with chaotic lasers. Science 279, 1198–1200 (1998b)
Vicente, R., Perez, T., Mirasso, C.R.: Open- versus closed loop performance of synchronized chaotic external cavity semiconductor lasers. IEEE J. Quantum Electron. 38, 1197–1204 (2002)
Voss, H.U.: Anticipating chaotic synchronization. Phys. Rev. E 61(5), 5115–5119 (2000)
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Lea, S.J., Spencer, P.S. Frequency domain analysis of the chaotic synchronization of injection-locked semiconductor lasers. Opt Quant Electron 40, 97–108 (2008). https://doi.org/10.1007/s11082-008-9209-6
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DOI: https://doi.org/10.1007/s11082-008-9209-6