Self-mixing interference inside a single-mode diode laser for optical sensing applications

Self-mixing interference inside a single-mode diode laser for optical sensing applications

This paper presents a theoretical analysis and a comparison with experimental results on self-mixing interference inside a single-longitudinal-mode diode laser. A theoretical model, based on the steady-state equations of the lasing condition in a Fabry-Perot type laser cavity, is described, and thro...

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Veröffentlicht in:Journal of lightwave technology 1994-09, Vol.12 (9), p.1577-1587
Hauptverfasser: Wang, W.M., Grattan, K.T.V., Palmer, A.W., Boyle, W.J.O.
Format: Artikel
Sprache:eng
Schlagworte:
Diode lasers
Distributed feedback devices
Equations
Intensity modulation
Interference
Laser feedback
Laser theory
Optical feedback
Optical sensors
Steady-state
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container_end_page 1587
container_issue 9
container_start_page 1577
container_title Journal of lightwave technology
container_volume 12
creator Wang, W.M.
Grattan, K.T.V.
Palmer, A.W.
Boyle, W.J.O.
description This paper presents a theoretical analysis and a comparison with experimental results on self-mixing interference inside a single-longitudinal-mode diode laser. A theoretical model, based on the steady-state equations of the lasing condition in a Fabry-Perot type laser cavity, is described, and through it a satisfactory analysis of self-mixing interference for optical sensing applications is given. In this work, the self-mixing interference produced by an external optical feedback is found to be due to the variations in the threshold gain and in the spectral distribution of the laser output. The gain variation results in an optical intensity modulation, and the spectral variation determines both the modulation waveform and the coherence properties of the interference. The theoretical analysis of the self-mixing interference is seen to yield a simulation of the laser power modulation which is in good agreement with the experiment results reported.< >
doi_str_mv 10.1109/50.320940
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source IEEE Electronic Library (IEL)
subjects Diode lasers
Distributed feedback devices
Equations
Intensity modulation
Interference
Laser feedback
Laser theory
Optical feedback
Optical sensors
Steady-state
title Self-mixing interference inside a single-mode diode laser for optical sensing applications
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