Instability of Single-Frequency Operation in Semilinear Photorefractive Coherent Oscillators

Mathey, P.; Odoulov, S.; Rytz, Daniel

doi:10.1103/physrevlett.89.053901

Cited by 16 publications

(8 citation statements)

References 23 publications

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“…In the same set-up with an immobile conventional mirror the degeneracy is broken for high coupling strengths at small pump ratios [5,6], this is illustrated in Fig. 2(b).…”

Section: Semilinear Coherent Oscillator With Vibrating Mirrormentioning

confidence: 83%

“…Several years ago it was discovered however that the frequency degenerate coherent oscillation in an oscillator like that shown in Fig. 1 may become unstable for a sufficiently high coupling strength [5,6]. Within a certain domain of pump intensity ratios a single frequency in the oscillation spectrum splits into two modes shifted symmetrically with respect to the frequency of the pump waves.…”

Section: Semilinear Coherent Oscillator With Vibrating Mirrormentioning

confidence: 99%

“…Two oscillation components with different frequencies propagate in both directions, from the conventional mirror to the phase conjugate one and vice versa. The interference of these components results in a deep modulation of the output oscillation intensity [5]. To avoid this intensity modulation, the intuitive solution is to introduce a feedback frequency shift Ω M (subscribe M indicates that the frequency shift is introduced by the vibrating mirror VM) that is equal exactly to 2Ω, as shown in Fig.…”

Section: Semilinear Coherent Oscillator With Vibrating Mirrormentioning

confidence: 99%

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Semilinear coherent optical oscillator with frequency shifted feedback

Rebhi¹,

Mathey²,

Jauslin³

et al. 2007

Opt. Express

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It is shown that the saw-tooth variation of the cavity length in a photorefractive semilinear coherent oscillator can suppress the instability in the frequency domain and prevent a bifurcation in the oscillation spectrum. To achieve such a suppression the frequency of the cavity length modulation should be chosen appropriately. It depends on the photorefractive crystal parameters (electrooptic properties, photoconductivity, dimensions) and on the experimental conditions (pump intensity ratio, orientation of the pump and oscillation waves with respect to the crystallographic axes, polarization of the pump waves, etc. ). It depends also strongly on a possible misalignment of the two pump waves. On the other hand, within a certain range of the experimental parameters the mirror vibration may lead to a further frequency splitting in the already existing two-mode oscillation spectrum.

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“…In the same set-up with an immobile conventional mirror the degeneracy is broken for high coupling strengths at small pump ratios [5,6], this is illustrated in Fig. 2(b).…”

Section: Semilinear Coherent Oscillator With Vibrating Mirrormentioning

confidence: 83%

Section: Semilinear Coherent Oscillator With Vibrating Mirrormentioning

confidence: 99%

Section: Semilinear Coherent Oscillator With Vibrating Mirrormentioning

confidence: 99%

See 1 more Smart Citation

Semilinear coherent optical oscillator with frequency shifted feedback

Rebhi¹,

Mathey²,

Jauslin³

et al. 2007

Opt. Express

View full text Add to dashboard Cite

show abstract

“…Such anti-scattering property of PCM has been extensively studied before (see, for example1–4). Based on such an effect, PCM has found a lot of applications in, for example, compensating for optical signal distortions1, 2, suppressing the turbidity of the biological tissue5, enhancing near-field light components6, 7, and constructing novel interferometers and resonators1, 8. Despite the broad range of uses that a PCM can be employed in, implementing a true PCM experimentally remain a tough challenge.…”

Section: Introductionmentioning

confidence: 99%

A phase conjugate mirror inspired approach for building cloaking structures with left-handed materials

2009

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A phase conjugate mirror (PCM) has a remarkable property of cancellation the back-scattering wave of the lossless scatterers. The similarity of a phase conjugate mirror to the interface of a matched RHM (right-handed material) and a LHM (left-handed material) prompts us to explore the potentials of using the RHM-LHM structure to achieve the anti-scattering property of the PCM. In this paper, we present two such structures. The first one is a RHM-LHM cloaking structure with a lossless arbitrary-shape scatterer imbedded in the RHM and its left-handed duplicate imbedded in the matched LHM. It is shown that such a structure is transparent to the incident electromagnetic (EM) field. As a special case of this structure, we proposed an EM tunnel that allows EM waves to spatially transport to another location in space without significant distortion and reflection. The second one is an RHM-PEC (perfect electric conductor)-LHM cloaking structure, which is composed of a symmetric conducting shell embedded in the interface junction of an RHM and the matched LHM layer. Such a structure presents an anomalously small scattering cross-section to an incident propagating EM field, and the interior of the shell can be used to shield small objects (size comparable to the wavelength) from interrogation. We report the results of 2D finite-element-method (FEM) simulations that were performed to verify our idea, and discuss the unique properties of the proposed structures as well as their limitations.

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“…Thus if one is mirrored by a PCM, he/she will see nothing but his/her own pupils, or to be more specific, he/she will see his/her left pupil with his/her left eye and he/she will see his/her right pupil with his/her right eye. The PCM has been used to compensate for optical signal distortions [3], to enhance nearfield light components [4], and to construct some novel interferometers and resonators [1,5]. Moreover, the field of phase conjugation has been extended into other areas, including RF and acoustic analogs of the optical phenomenon [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Electromagnetic equivalent model for phase conjugate mirror based on the utilization of left-handed material

2007

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An electromagnetic equivalent model for the phase conjugate mirror (PCM) is proposed in this paper. The model is based on the unique property of the isotropic left-handed material (LHM) -the ability of LHM to reverse the phase factors of propagative waves. We show that a PCM interface can be substituted with a LHM-RHM (right-handed material) interface and associated image sources and objects in the LHM. This equivalent model is fully equivalent in the treatment of propagative wave components. However, we note that the presence of evanescent wave components can lead to undesirably surface resonance at the LHM-RHM interface. This artefact can be kept well bounded by introducing a small refractive index mismatch between the LHM and RHM. We demonstrate the usefulness of this model by modelling several representative scenarios of light patterns interacting with a PCM. The simulations were performed by applying the equivalent model to a commercial finite element method (FEM) software. This equivalent model also points to the intriguing possibility of realizing some unique LHM based systems in the optical domain by substituting a PCM in place of a LHM-RHM interface.

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Instability of Single-Frequency Operation in Semilinear Photorefractive Coherent Oscillators

Cited by 16 publications

References 23 publications

Semilinear coherent optical oscillator with frequency shifted feedback

Semilinear coherent optical oscillator with frequency shifted feedback

A phase conjugate mirror inspired approach for building cloaking structures with left-handed materials

Electromagnetic equivalent model for phase conjugate mirror based on the utilization of left-handed material

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