Effect of phase-conjugate optical feedback on the intensity noise in laser diodes

Langley, L.N.; Shore, K.A.

doi:10.1364/ol.18.001432

Cited by 25 publications

(7 citation statements)

References 5 publications

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“…Phase-conjugate optical feedback (PCF) has been extensively used for applications where one needs to stabilize a laser diode output through phase or mode locking [1,2] or to improve laser performances such as single-mode emission [3], spectral linewidth [4,5], and intensity noise [6]. However, experimental and theoretical works have shown that, depending on the feedback parameters, the laser diode also can exhibit complex nonlinear dynamics, leading to chaos [7][8][9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Chaos crisis and bistability of self-pulsing dynamics in a laser diode with phase-conjugate feedback

et al. 2011

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International audienceA laser diode subject to a phase-conjugate optical feedback can exhibit rich nonlinear dynamics and chaos. We report here on two bifurcation mechanisms that appear when increasing the amount of light being fed back to the laser. First, we report on a full suppression of chaos from a crisis induced by a saddle-node bifurcation on self-pulsing, so-called external-cavity-mode solutions (ECMs). Second, the feedback-dependent torus and saddle-node bifurcations on ECMs may be responsible for large regions of bistability between ECMs of different and high (beyond gigahertz) frequencies

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Section: Introductionmentioning

confidence: 99%

Chaos crisis and bistability of self-pulsing dynamics in a laser diode with phase-conjugate feedback

et al. 2011

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“…This is the typical configuration that is modeled when exploring phaseconjugate feedback into semiconductor lasers for dynamic stabilization. [6][7][8] Note that this formalism also displays the well-known energy conservation from FWM processes. In other words, if the incident signal is detuned from the pumps, represented as E I (t) ϭ A I ͓exp(i⌬t)͔, the return field is given by…”

Section: Externally Pumped Four-wave Mixing In a Kerr Mediummentioning

confidence: 90%

“…For semiconductor lasers, which are prone to dynamic instabilities, 5 it has been theoretically shown that temporal phase-conjugate feedback can help stabilize the laser. [6][7][8] This can be understood by imagining a laser field A͕exp͓i(t)͔͖ and adding a phase-conjugate field A͕exp͓Ϫi(t)͔͖, the summation of which would yield partial cancellation of the time-varying phase of the laser.…”

Section: Introductionmentioning

confidence: 99%

Spatio-temporal nature of the optical return field generated by four-wave mixing in photorefractive and Kerr materials

Marciante

Roh

2002

J. Opt. Soc. Am. B

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We have theoretically analyzed the return field produced by an externally pumped Kerr medium, an externally pumped photorefractive medium, and a self-pumped photorefractive medium, for an input field with arbitrary spatial and temporal characteristics. For a stationary beam with spatial structure, all three cases yield a spatial phase-conjugate return beam. For a beam with dynamic fluctuations, each case returns a field with different temporal character. For the case of a self-pumped photorefractor, it is found that the dynamics of the return beam are represented by a conventional reflection rather than a temporal phase conjugate. While this geometry may have been thought of as a simple way to provide phase-conjugate feedback for dynamic stabilization in semiconductor lasers, an in-depth analysis shows that our theoretical findings agree with previously reported experimental results.

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“…In addition attention is given to the effects of feedback distancenoise on the predicted dynamical behaviour. The application of phase conjugate feedback to conventional semiconductor lasers has been widely studied both theoretically and experimentally [25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] but, to date, only one study has been made of phase conjugate effects on nano-lasers [18]. The combination of phase conjugate 2 feedback and optical injection offers opportunities for the novel dynamical responses discussed in the present work.…”

Section: Introductionmentioning

confidence: 99%

Dynamical characteristics of nano‐lasers subject to optical injection and phase conjugate feedback

Han

Shore

2018

IET Optoelectronics

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The dynamics of nano-lasers has been analysed using rate equations which include the Purcell cavity-enhanced spontaneous emission factor F and the spontaneous emission coupling factor β. It is shown that when subject to optical injection and phase conjugate feedback nano-lasers may exhibit remarkably stable small-amplitude oscillations with frequencies of order 300 GHz. Critically it is established that such oscillations persist when the effects of noise are taken into account. The appearance of such high-frequency oscillations is associated with the effective reduction of the carrier lifetime for larger values of the Purcell factor, F, and spontaneous coupling factor, β. The effects of the feedback distance and bias currents are also considered. As the optical injection strength increases for fixed phase conjugate feedback and relatively short feedback distances, the nano-laser displays periodic dynamics and then enters stable locking. As the feedback distance increases the quasi-periodic dynamics dominates. Increased bias current can also induce quasi-periodic behaviour albeit this may be ameliorated by reducing the strength of the phase conjugate feedback. Commented [h1]: In this paper, we didn't add noise. Shall we change it as feedback distance? Yes this is OK

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Effect of phase-conjugate optical feedback on the intensity noise in laser diodes

Cited by 25 publications

References 5 publications

Chaos crisis and bistability of self-pulsing dynamics in a laser diode with phase-conjugate feedback

Chaos crisis and bistability of self-pulsing dynamics in a laser diode with phase-conjugate feedback

Spatio-temporal nature of the optical return field generated by four-wave mixing in photorefractive and Kerr materials

Dynamical characteristics of nano‐lasers subject to optical injection and phase conjugate feedback

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