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22 September 2010 Analysis of originating ultra-short optical dissipative solitary pulses in the actively mode-locked semiconductor heterolasers with an external fiber cavity
Alexandre S. Shcherbakov, Joaquin Campos Acosta, Alicia Pons Aglio, Pedro Moreno Zarate, Svetlana Mansurova
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Proceedings Volume 7750, Photonics North 2010; 775026 (2010) https://doi.org/10.1117/12.873648
Event: Photonics North 2010, 2010, Niagara Falls, Canada
Abstract
We present an advanced approach to describing low-power trains of bright picosecond optical dissipative solitary pulses with an internal frequency modulation in practically important case of exploiting semiconductor heterolaser operating in near-infrared range in the active mode-locking regime. In the chosen schematic arrangement, process of the active mode-locking is caused by a hybrid nonlinear cavity consisting of this heterolaser and an external rather long single-mode optical fiber exhibiting square-law dispersion, cubic Kerr nonlinearity, and small linear optical losses. Our analysis of shaping dissipative solitary pulses includes three principal contributions associated with the modulated gain, total optical losses, as well as with linear and nonlinear phase shifts. In fact, various trains of the non-interacting to one another optical dissipative solitons appear within simultaneous balance between the second-order dispersion and cubic-law Kerr nonlinearity as well as between active medium gain and linear optical losses in a hybrid cavity. Our specific approach makes possible taking the modulating signals providing non-conventional composite regimes of a multi-pulse active mode-locking. Within our model, a contribution of the appearing nonlinear Ginzburg-Landau operator to the parameters of dissipative solitary pulses is described via exploiting an approximate variational procedure involving the technique of trial functions.
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Alexandre S. Shcherbakov, Joaquin Campos Acosta, Alicia Pons Aglio, Pedro Moreno Zarate, and Svetlana Mansurova "Analysis of originating ultra-short optical dissipative solitary pulses in the actively mode-locked semiconductor heterolasers with an external fiber cavity", Proc. SPIE 7750, Photonics North 2010, 775026 (22 September 2010); https://doi.org/10.1117/12.873648
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KEYWORDS
Mode locking
Active optics
Modulation
Nonlinear optics
Semiconductors
Solitons
Heterojunctions
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