Behavioral model of a self-mixing laser diode sensor

ABSTRACT:We have recently proposed differential optical feedback interferometry as a convenient method to measure nanometric displacements. In this paper, we present experimental results to support the proposed method. The acquisition system (in particular the conditioning electronics), and, the signal processing algorithm applied to the captured signal, will be described. Obtained results show good agreement with measurements performed using a capacitive sensor employed as reference.

show abstract

“…Depending on the amount of retroinjected energy, the OOP can take different signal shapes as it is described in [13].…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Differential optical feedback interferometry for the measurement of nanometric displacements

Azcona

Atashkhooei²,

Royo³

2014

Opt. Pura Apl.

View full text Add to dashboard Cite

show abstract

“…The feedback level is measured by a factor C defined in [20][21][22]. However, with the change of operational conditions, such as injection current and parameters associated with the external cavity including C and external cavity length, the LD can also exhibit unstable behavior.…”

Section: Introductionmentioning

confidence: 99%

“…For 1  C , equation (8) may yield multiple possible s  , and the SMI signal shows asymmetric hysteresis and produces sawtooth-like fringes. The mechanism of generating an SMI signal as well as its behavior with respect to C has been well-established and presented in [8,20,21,26,27]. However, when the system enters into the unstable state, the premise for deriving the stationary solutions will be no longer valid, thus leading to the actual behavior of the system can not be described by the existing SMI model.…”

Section: Introductionmentioning

confidence: 99%

Dynamic stability analysis for a self-mixing interferometry system

Fan

et al. 2014

Opt. Express

View full text Add to dashboard Cite

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 ( L0 ) and the light phase (∅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 , ∅0), from which a critical C (denoted as Ccritical) is derived. Both simulations and experiments show that the stability can be enhanced by increasing either L0 or J . Furthermore, three regions on the plane of (C , ∅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. Abstract: 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 ( 0 L ) and the light phase ( 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 LangKobayashi model. The stability boundary of such system is presented in the plane of ( C , 0  ), from which a critical C (denoted as critical C ) is derived. Both simulations and experiments show that the stability can be enhanced by increasing either 0 L or J . Furthermore, three regions on the plane of ( C , 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 semistable region has potential applications on sensing and measurement but needs re-modeling the system by considering the bandwidth of the detection components. Disciplines Engineering | Science and Technology Studies

show abstract

“…An interesting work was done by Donati et al [10] reporting that a stable OFSMI signal was observed for the case of around 6. Some OFSMI waveforms for the cases of are also presented based on computer simulations in [15]. However, neither [10] nor [15] specify which particular mode is the one actually occurring.…”

mentioning

confidence: 99%

“…Some OFSMI waveforms for the cases of are also presented based on computer simulations in [15]. However, neither [10] nor [15] specify which particular mode is the one actually occurring. To identify the actual mode, we need to consider the effects of feedback on the spectra of SLs.…”

mentioning

confidence: 99%

Optical Feedback Self-Mixing Interferometry With a Large Feedback Factor $C$: Behavior Studies

Chicharo

et al. 2009

IEEE J. Quantum Electron.

View full text Add to dashboard Cite

This paper studies the behavior of optical feedback self-mixing interferometric (OFSMI) systems, where the semiconductor lasers operate at a single mode (perturbed external cavity mode) with a large optical feedback factor C. Based on analysis of the spectral linewidth associated with all the possible lasing modes at different C values, a set of mode jumping rules are proposed following the minimum linewidth mode competition principle proposed in . According to the rules, the C factor can be classified into different regions, on which an OFSMI system will exhibit distinct phenomena. In particular, for the same amount of displacement associated with the external cavity, the fringe number reduction on the OFSMI signal should be observed when C increases from one region to the next. An experimental setup with a laser diode HL7851G was implemented and employed to verify the proposed rules. The behavior of the OFSMI predicted by the paper has been confirmed by the experiments with C value up to 8.0. Disciplines Physical Sciences and Mathematics Publication DetailsYu, Y., Xi, J., Chicharo, J. . According to the rules, the factor can be classified into different regions, on which an OFSMI system will exhibit distinct phenomena. In particular, for the same amount of displacement associated with the external cavity, the fringe number reduction on the OFSMI signal should be observed when increases from one region to the next. An experimental setup with a laser diode HL7851G was implemented and employed to verify the proposed rules. The behavior of the OFSMI predicted by the paper has been confirmed by the experiments with value up to 8.0.Index Terms-Mode competition, optical feedback factor, optical feedback interferometry, self-mixing effect, semiconductor laser (SL).

show abstract

Behavioral model of a self-mixing laser diode sensor

Cited by 119 publications

References 12 publications

Differential optical feedback interferometry for the measurement of nanometric displacements

Differential optical feedback interferometry for the measurement of nanometric displacements

Dynamic stability analysis for a self-mixing interferometry system

Optical Feedback Self-Mixing Interferometry With a Large Feedback Factor $C$: Behavior Studies

Contact Info

Product

Resources

About