Self-oscillations of an induced absorber (CdS) in a hybrid ring resonator

Wegener, M.; Klingshirn, C.

doi:10.1103/physreva.35.1740

Cited by 49 publications

(5 citation statements)

References 13 publications

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“…The oscillation frequency as well as the square-wave shape hint of a thermal origin of the dynamics. Indeed, optothermal pulsations with a very similar phenomenology were studied in quantum well amplifiers [12,13] and are * thorsten.ackemann@strath.ac.uk typical for a variety of other nonlinear optical systems [14][15][16][17]. It was shown in Ref.…”

Section: Introductionmentioning

confidence: 91%

Low-frequency self-pulsing in single-section quantum-dot laser diodes and its relation to optothermal pulsations

Tierno

Radwell

Ackemann³

2011

Phys. Rev. A

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Self-sustained pulsations in the output of an InAs quantum dot laser diode in the MHz range are reported. The characteristics (shape, range, and frequency) are presented for the free-running laser and when optical feedback in the Littrow configuration is applied. Bistability in the light-current characteristics is observed for operating wavelengths smaller than the gain peak, but it is not present for wavelengths above the gain peak and for the free-running laser, except at elevated temperatures. The temporal evolution of the envelopes of the optical spectra is very different for operation below, around, and above the gain peak, which might be related to a change of phase-amplitude coupling across the gain maximum, in agreement with the expectation for a two-level system. The time scale and the bifurcation scenario, supported by an initial blueshift of the emission wavelength of each longitudinal mode in time-resolved optical spectra, suggests that these are optothermal pulsations similar to those reported in quantum well amplifiers [Phys. Rev. E 68, 036209 (2003)]. The mechanism of pulsation seems to be a destabilization of bistable states (due to saturable absorption in the beam wings) by a slow thermal change in the waveguiding properties

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Section: Introductionmentioning

confidence: 91%

Low-frequency self-pulsing in single-section quantum-dot laser diodes and its relation to optothermal pulsations

Tierno

Radwell

Ackemann³

2011

Phys. Rev. A

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“…In refs 29 and 30 a bifurcation diagram is given in the ko -y\ly\ plane. As we change the offset and the gain, both ko and y\ly\ change but they are related by T>5°= [ClO2-]res/[rU0.7348V*cio2-1 1 (17) Thus, the bifurcation diagrams in refs 29 and 30 are traversed, following a hyperbolic path as the offset or gain is changed.…”

Section: Introductionmentioning

confidence: 60%

Experimental Stabilization of Unstable Steady States in Oscillatory and Excitable Reaction Systems

Hjelmfelt¹,

Ross²

1994

J. Phys. Chem.

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A feedback method is used to stabilize unstable stationary states in experiments with the chlorite-iodide reaction. The unstable stationary states occur in oscillatory and excitable regions of constraint space. Stabilization of unstable steady states provides information about these states and may be of practical importance. An analytical study of a model mechanism of this reaction is consistent with the experiments. This feedback method does not create new stationary states but stabilizes unstable stationary states present in the autonomous system. Unlike "thermostat" type methods, knowledge of the exact location of the unstable stationary states of the autonomous system is not required to implement this feedback method.

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“…Furthermore since the earlier analysis yielded a single characteristic time, it could not describe even qualitatively the switching phenomena observed. We note parenthetically that a relaxation equation was also used to describe the temperature within the illuminated region of semiconductor systems exhibiting absorptive bistability by several authors (Hajto and Janossy 1983, Gutowski et al 1989, Wegener and Klingshirn 1987, Haddad et al 1986, Kretzschmar et al 1987.…”

Section: T (U ζ τ ) For Gaussian Heating With Constant Absorption Factormentioning

confidence: 98%

“…Therefore prototype optical flow gauges were made capable of measuring, by laser beams only, flow rates as low as 0.003 m 3 h −1 at 1 atm (Scott and Chen 1992)-see figure 7. Fifthly, it was recognized as early as 1984 that optical bistability could be used as a temperature sensor (Miller 1984, Jaeger et al 1985, Lambsdorff et al 1986 with reduction to practice demonstrated with Ar laser-pumped CdS (Grohs et al 1990, Wegener and Klingshirn 1987, Haddad et al 1986. Recently these phenomena in PMN and PLZT have been under study in Sweden (Ozolinsh et al 1997), Japan (Chen et al 1995) and Latvia (Krumins et al 1994(Krumins et al , 1995(Krumins et al , 1996 as well as in the USA and Australia (O 'Sullivan et al 1995.…”

Section: Introductionmentioning

confidence: 99%

Thermal focusing and optical bistability in ferroelectrics

O’Sullivan

McGregor

Scott

2001

J. Phys.: Condens. Matter

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A review is presented of phenomena involving thermal focusing and optical bistability arising from the temperature dependence of the refractive index in ferroelectrics. Aperiodic spatio-temporal oscillations have been observed in the light transmitted and reflected by parallel-sided crystal and ceramic samples of the thermo-optic ferroelectrics PMN (lead magnesium niobate, Pb(Mg 1/3 Nb 2/3 )O 3 ), PLZT (lanthanum doped lead zirconium titanate, Pb(Zr 1−x Ti x )O 3 :La), BNN (barium sodium niobate, Ba 2 NaNb 5 O 15 ) and Ce:SBN (cerium doped strontium barium niobate, Ce 3+ :Sr x Ba 1−x Nb 2 O 6 ) under steady illumination by an incident c.w. laser beam of finite beamwidth. Such materials focus the incident beam due to the temperature dependence of the refractive index and the establishment of a radial temperature gradient. The shape of the resulting thermal lens varies in time as a result of variation in the absorbed energy arising from both thermal focusing and optical bistability (Fabry-Pérot resonance). Whereas PMN and PLZT exhibit relaxation oscillations, the beam oscillations produced by BNN and Ce:SBN have equal rise and fall times. We compare the predictions of theoretical models with experimental results for ferroelectric ceramics and crystals. The principal conclusions from the present work are that (1) there are two distinct mechanisms for aperiodic oscillation in dispersively nonlinear plates, viz., focusing oscillations and Fabry-Pérot switching oscillations, of which only the latter involves bistability; (2) in Fabry-Pérot etalons with a diffusive nonlinearity, as contrasted with the systems (e.g. laser tubes) originally described by Gordon et al, the diffusive quantity (i.e. temperature) can exhibit bistable and multistable switching behaviour, leading to regenerative oscillations in other variables (e.g. light output); (3) there are two characteristic relaxation times involved in these oscillations, differing by several orders of magnitude; (4) the spatio-temporal characteristics of the transmitted beam patterns in the near and far fields can be quantitatively predicted and (5) comparison between theory and experiment can provide information on the temperature dependence of conductivity and thermo-optic coefficient near the ferroelectric phase transition.

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Self-oscillations of an induced absorber (CdS) in a hybrid ring resonator

Cited by 49 publications

References 13 publications

Low-frequency self-pulsing in single-section quantum-dot laser diodes and its relation to optothermal pulsations

Low-frequency self-pulsing in single-section quantum-dot laser diodes and its relation to optothermal pulsations

Experimental Stabilization of Unstable Steady States in Oscillatory and Excitable Reaction Systems

Thermal focusing and optical bistability in ferroelectrics

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