Angle measurement by injection-detection in a laser diode

We revisit the well-known Tkach and Chraplyvy (T-C) diagram of feedback regimes in semiconductor lasers. Our aim is twofold: first, extending the classification of feedback effects in the T-C diagram to short and long external cavities, and to coherent and incoherent interactions; second and more important, identifying in the diagram feedback phenomena that have been meanwhile studied and developed to noteworthy applications, namely, self-mixing, period-1 and multiperiodicity, intermittency and chaos. We complement the feedback diagram with application regions, so as to describe not only feedback effects detrimental to a laser used as the transmitter of an optical link, but also feedback effects in the weak and strong regime of interaction, developed into applications for instrumentation and communications in recent years

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“…One is the extension to very high C regime of the basic self-mixing principle [29] (see Fig. 9), by which Fig.…”

Section: Description Of Strong Feedback: Chaosmentioning

confidence: 99%

The Diagram of Feedback Regimes Revisited

Donati

Horng

2013

IEEE J. Select. Topics Quantum Electron.

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“…Third, the HL7851G LD emitting at 785 nm was used to obtain a moderate SM signal for a p-p target displacement of 5 and with a target modulation frequency of 330 Hz. Another commercial PZT from Physik Instrumente (P753.2CD), having an accuracy of 2 nm and also equipped with an integrated capacitive feedback was used as the target.…”

Section: B Displacement Measurementmentioning

confidence: 99%

“…Furthermore, the coupling factor , depending notably on the surface reflectivity and the distance to the target, will induce several levels of feedback, causing different shapes of variations of the OOP. The very weak regime has sinusoidal fringes, the weak regime is characterized by slightly asymmetric OOP fringes, the moderate regime presents sharper sawtooth-like OOP signal with hysteresis whereas the strong feedback regime results in a fringe-free OOP signal [5], [6]. Thus, each regime may require an adapted signal processing for displacement measurements.…”

Section: Introductionmentioning

confidence: 99%

Adaptive Transition Detection Algorithm for a Self-Mixing Displacement Sensor

2009

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A new algorithm for self-mixing (SM) sensors has been developed to perform displacement measurements. It is able to differentiate between the different SM regimes (very weak, weak, moderate, and strong) and thus converges automatically to the optimum threshold level required to detect all the SM fringes, independently of the shape of the signal. Displacement reconstructions based on this algorithm have been validated with counter measuring commercial sensors for both weak and moderate regime acquisitions which are most frequently encountered under experimental conditions. Index Terms-Displacement measurement, optical feedback, optical interferometry.

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“…Self-mixing interference using single-mode laser diodes has been exploited for velocity [4], distance [4,5], displacement [6], and angle [7] measurements. This paper presents some of the experimental results obtained in the study of optical feedback effects in low-cost Fabry-Perot laser diodes operating with multiple laser modes.…”

Section: Introductionmentioning

confidence: 99%

Self-mixing technique for vibration measurements in a laser diode with multiple modes created by optical feedback

Ruiz-Llata

Lamela

2009

Appl. Opt.

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We present experimental and theoretical results obtained from the study of the effects of optical feedback in low-cost Fabry-Perot laser diodes due to the presence of an external cavity created by an external reflective or diffusive vibrating target. Experimental results show that a change in the length of the external cavity produces the well-known amplitude modulation of the optical output power and, depending on the amount of optical feedback, a subperiodicity appears in the amplitude modulation of the output power. The experiments show that the subperiodicity appears independently of the length of the external cavity and is due to mode hopping between different longitudinal laser modes. Numerical analysis focused on the effects observed support that the mode hop occurs between modes whose round-trip phase delay along the external cavity is out of phase, thus producing a subperiodicity of the total amplitude modulation.

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Angle measurement by injection-detection in a laser diode

Cited by 8 publications

References 11 publications

The Diagram of Feedback Regimes Revisited

The Diagram of Feedback Regimes Revisited

Adaptive Transition Detection Algorithm for a Self-Mixing Displacement Sensor

Self-mixing technique for vibration measurements in a laser diode with multiple modes created by optical feedback

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