Tolerance of phase-locked VCSEL arrays to random and systematic parameter deviations among cavities
| Autor: | S.A. Riyopoulos |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
Physics
business.industry Phase (waves) Rate equation Condensed Matter Physics Atomic and Molecular Physics and Optics Computational physics Vertical-cavity surface-emitting laser Semiconductor laser theory Root mean square Nonlinear system Matrix (mathematics) Optics Electrical and Electronic Engineering business Eigenvalues and eigenvectors |
| Zdroj: | IEEE Journal of Quantum Electronics. 41:1450-1460 |
| ISSN: | 0018-9197 |
| DOI: | 10.1109/jqe.2005.858790 |
| Popis: | Cavity parameter deviations from their nominal values affect phase-locking in vertical-cavity surface-emitting lasers (VCSEL) arrays. The phase-locking tolerance is studied analytically and numerically for both random as well as systematic parameter variations. Parameter-induced deviations among the cavity eigenfrequencies cause the dominant effect. For small externally imposed variations, self-regulated nonlinear frequency pulling among cavities overcomes original detuning and permits phase-locking. The root mean square (rms) tolerance threshold is derived by solving a quasi-random matrix eigenvalue under simplifying assumptions. Tolerance increases with intercavity coupling strength and decreases with the array size M. Systematic variations, such as thermal drifts, exhibit a lower tolerance decreasing as /spl prop/1/M or faster, compared to random variations /spl prop/1//spl radic/M. Theory results qualitatively agree with large size array simulations employing actively coupled rate equations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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