Laser Doppler velocimeter using the self-mixing effect of a semiconductor laser diode

Shinohara, S.; Mochizuki, Ayako; Yoshida, H.; Sumi, Masao

doi:10.1364/ao.25.001417

Cited by 184 publications

(60 citation statements)

References 5 publications

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“…Optical feedback into a LD can induce profound modification to its light-emission properties, and has thus attracted considerable attention over the past four decades starting with applications in velocimeters and position sensors [1,2,3,4]. These devices exploit the beating within the cavity at the Doppler frequency of returned light with the light emitted by the LD.…”

Section: Introductionmentioning

confidence: 99%

Reading bits on a CD‐ROM without a photodiode

Wishon

Locquet

Mourozeau

et al. 2017

IET Optoelectronics

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Abstract:We demonstrate that the bits of a CD-ROM can be read without a photodiode (PD). A commercial CD-ROM drive was used and left unmodified except a beam splitter was removed which would route the light to a PD. This allowed for the reflected light to be incident on the laser within the laser package itself. By monitoring fluctuations in the voltage across the laser diode (LD) under constant-current injection, it was possible to read and interpret the bits from a spinning CD-ROM.

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Section: Introductionmentioning

confidence: 99%

Reading bits on a CD‐ROM without a photodiode

Wishon

Locquet

Mourozeau

et al. 2017

IET Optoelectronics

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“…Unfortunately, this class of signals is random and non stationary and it appears that specific methods of analysis are required. Among these various methods, Time-Frequency Analysis seems to be the most suitable and powerful tool to the treatment of such a kind of signals especially when the acquisition is made with an optical laser beam probe [1,[3][4][5][6]. In this work, we have chosen the well known Choi-Williams energy distribution [7], which belongs to the very reputed Cohen's Class of energy distributions [8].…”

Section: Introductionmentioning

confidence: 99%

Choi-Williams time-frequency analysis of forearm flexors Mechanomyogram acquired from a laser diode sensor based probe

Mekaoui¹,

Ghoumid²,

Gharbi³

2012

WIT Transactions on Ecology and the Environment

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The aim of this paper is to show how time-frequency plane can be used to directly read the frequency contents of forearm flexors muscles vibrations actually called MMG signals (Mechanomyogram). The MMG signals under scope are acquired from a laser diode sensor based probe connected to precise interface acquisition cards and the acquired signals are put into the memory of a PC for further analysis. The time-frequency technique used is the Choi-Williams energy distribution which belongs to the well reputed Cohen's class and satisfies many very useful properties especially in its 3D version. With this technique a good compromise between time and frequency resolution can be found. The 3D spectrograms displayed from the data acquired from few normal subjects and patients with specific muscle disorders are compared. This analysis method revealed an efficient localization of the MMG most significant frequencies.

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“…A significant characteristic associated with an SL is the strong connection between emitted laser power (or the junction voltage) and the external optical feedback [1]- [6]. Based on this connection, a technology called optical feedback self-mixing interferometry (OFSMI) has been developed for sensing and measurement applications [7]- [18]. In contrast to other traditional interferometric techniques, OFSMI has many advantages such as simplicity in system structure, low cost in implementation, and ease in optical alignment, and hence, has attracted extensive research activities.…”

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confidence: 99%

“…The PD detects the emitted power of the SL, referred to as the OFSMI signal, which is sent to the data processing unit where the signal is analyzed in order to extract useful information. The scenario behind OFSMI is a theoretical model developed from Lang and Kobayashi (L-K) equations [5], and the model is described as follows [7]- [18]:…”

mentioning

confidence: 99%

“…Also (1)-(3) are able to describe the signal waveform because (1) presents a unique mapping from to . In this situation, the external cavity movement will result in an OFSMI signal waveform with a fringe structure similar to the traditional interference fringes, and each fringe period corresponds to phase shift that is equivalent to a displacement of half wavelength of the external target [7]- [18]. When , stable OFSMI signals can still be acquired for many SLs, but the behavior of the OFSMI system becomes a bit more complicated as (1) may yield three possible values for a particular , corresponding to three different lasing modes.…”

mentioning

confidence: 99%

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

Chicharo

et al. 2009

IEEE J. Quantum Electron.

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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).

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Laser Doppler velocimeter using the self-mixing effect of a semiconductor laser diode

Cited by 184 publications

References 5 publications

Reading bits on a CD‐ROM without a photodiode

Reading bits on a CD‐ROM without a photodiode

Choi-Williams time-frequency analysis of forearm flexors Mechanomyogram acquired from a laser diode sensor based probe

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

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