Self-quenching in semiconductor lasers and its applications in optical memory readout

Seko, Atsuya; Mitsuhashi, Yoshinobu; Morikawa, Takayuki; Shimada, Junichi; Sakurai, K.

doi:10.1063/1.88384

Cited by 24 publications

(4 citation statements)

References 6 publications

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“…This concept was, in fact, proposed by Mitsuhashi, and a simple optical head was presented. [9][10] The feedback effects on the lasing performance of LDs have been the subject of intense investigation [ 1 1-17]. Generally speaking, the light feedback induces cooperative changes in photon and carrier densities in the laser medium.…”

Section: Principlementioning

confidence: 99%

<title>Optical heads based on coupled-cavity laser diode</title>

Katagiri

Ukita

1995

SPIE Proceedings

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Optical heads wherein a laser diode (LD)is optically coupled through a small aperture to a recording medium acting as an external mirror are described. A flying head and a fiber-coupled head are presented, and their high-sensitivity, wavelength-free detection characteristics are demonstrated. A micro-lens head is also investigated. Interference undulations of the coupled-cavity laser with various spatial frequencies due to variation in the external-cavity length are completely explained. Anti-reflection (AR) coatings on the LD facet with reflectivities of better than -40 dB greatly suppress these undulations. To achieve practical heads, fundamental fabrication techniques including AR coating and monolithic integration on laser wafers are briefly mentioned.

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Section: Principlementioning

confidence: 99%

<title>Optical heads based on coupled-cavity laser diode</title>

Katagiri

Ukita

1995

SPIE Proceedings

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“…This homodyne technique, in which the laser acts simultaneously as source, mixer and shot-noise limited detector, allows retrieval of information about the external cavity, comprising the target and the external medium, by monitoring the response of the laser to OF. Thanks to the universal and simple character of the SM phenomenon, its functionality has been demonstrated from the visible to the microwave range using laser systems as diverse as gas lasers 5 , solid-state lasers 6 and semiconductor lasers 7 . This has led to the development of a large number of sensing applications 8,9 ranging from displacement measurement 10 to material analysis 11 , laser emission spectrometry 12 and coherent imaging 13,14 .…”

mentioning

confidence: 99%

Optomechanical response with nanometer resolution in the self-mixing signal of a terahertz quantum cascade laser

Ottomaniello,

Keeley,

Rubino

et al. 2019

Preprint

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The effectiveness of self-mixing interferometry has been demonstrated across the electromagnetic spectrum, from visible to microwave frequencies, in a plethora of sensing applications, ranging from distance measurement to material analysis, microscopy and coherent imaging. Owing to their intrinsic stability to optical feedback, quantum cascade lasers (QCLs) represent a source that offers unique and versatile characteristics to further improve the self-mixing functionality at mid-infrared and terahertz (THz) frequencies. Here, we show the feasibility of detecting with nanometer precision deeply subwalength (< λ /6000) mechanical vibrations of a suspended Si 3 N 4 -membrane used as the external element of a THz QCL feedback interferometric apparatus. Besides representing a platform for the characterization of small displacements, our self-mixing configuration can be exploited for the realization of optomechanical systems, where several laser sources can be linked together through a common mechanical microresonator actuated by radiation pressure.

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“…The feedback-to-voltage physics in Ref. [2,3,10,11] does not take account of the rich dynamics. We show that the dynamical regimes-as well as the bifurcations between them-are reproduced in the dc component V dc of V while tracing the more typically detected optical output.…”

mentioning

confidence: 99%

Mapping the nonlinear dynamics of a laser diode via its terminal voltage

et al. 2014

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We show that the bifurcations between dynamical states originating in the nonlinear dynamics of an external-cavity semiconductor laser at constant current can be detected by its terminal voltage V. We experimentally vary the intensity fed back into the gain medium by the external cavity and show that the dc component V(dc) of V tracks the optical intensity-based bifurcation diagram. It is shown using computational results based upon the Lang-Kobayashi model that whereas optical intensity accesses the dynamical-state variable |E|, V is related to population-inversion carrier density N. The change in feedback strength affects N and thereby the quasi-Fermi energy level difference at the p-i-n junction band-gap of the gain medium. The change in the quasi-Fermi energy-level thereby changes the terminal voltage V. Thus V is shown to provide information on the change in the dynamical-state variable N, which complements the more conventionally probed optical intensity.

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Self-quenching in semiconductor lasers and its applications in optical memory readout

Abstract: The laser oscillation in a double-heterostructure GaAlAs laser is quenched by its own output laser beam. Application of this effect in optical memory readout is suggested and demonstrated.

Cited by 24 publications

References 6 publications

<title>Optical heads based on coupled-cavity laser diode</title>

<title>Optical heads based on coupled-cavity laser diode</title>

Optomechanical response with nanometer resolution in the self-mixing signal of a terahertz quantum cascade laser

Mapping the nonlinear dynamics of a laser diode via its terminal voltage

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