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Dynamic stability analysis for a self-mixing interferometry system
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DOI：10.1364/OE.22.029260.png)
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摘要
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A self-mixing interferometry (SMI) system is a laser diode (LD) with an external cavity formed by a moving external target. The behavior of an SMI system is governed by the injection current J to the LD and the parameters associated with the external cavity mainly including optical feedback factor C, the initial external cavity length (L-0) and the light phase (phi(0)) which is mapped to the movement of the target. In this paper, we investigate the dynamic behavior of an SMI system by using the Lang-Kobayashi model. The stability boundary of such system is presented in the plane of (C, phi(0)), from which a critical C (denoted as C-critical ) is derived. Both simulations and experiments show that the stability can be enhanced by increasing either L-0 or J. Furthermore, three regions on the plane of (C, phi(0)) are proposed to characterize the behavior of an SMI system, including stable, semi-stable and unstable regions. We found that the existing SMI model is only valid for the stable region, and the semi-stable region has potential applications on sensing and measurement but needs remodeling the system by considering the bandwidth of the detection components. (C) 2014 Optical Society of America
Keyword:
EXTERNAL OPTICAL FEEDBACK
LINEWIDTH-ENHANCEMENT FACTOR
SEMICONDUCTOR-LASERS
SENSING APPLICATIONS
DIODE
INTERFERENCE
PARAMETER
CAVITY
CHAOS
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期刊
IF:
3.3
论文数:
6.1W
被引数:
14.3W
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