Amplitude noise squeezed light from polarisation singlemode VCSEL

Degen, Christian L.; Vey, J.-L.; Elsäßer, Wolfgang; Schnitzer, P.; Ebeling, Karl Joachim

doi:10.1049/el:19981099

Cited by 22 publications

(7 citation statements)

References 8 publications

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“…But there is also more fundamental reason for understanding of the polarization behavior in VCSELs, namely, a possibility of generating the intensity-squeezed light using the sub-Poissonian pumping of the active medium [3,4]. To date, squeezing in VCSELs has been demonstrated experimentally for both single-mode operation and in a multi-transversemode regime [5,6]. In single-mode operation with only one linearly polarized mode above threshold the fluctuations in a sub-threshold mode with polarization orthogonal to the lasing mode can present large intensity noise [7,8] and, moreover, be highly correlated with the intensity fluctuations of the oscillating mode.…”

Section: Introductionmentioning

confidence: 99%

Polarization squeezing in vertical-cavity surface-emitting lasers

et al. 2004

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We further elaborate the theory of quantum fluctuations in vertical-cavity surfaceemitting lasers (VCSELs), developed in Ref. [1]. In particular, we introduce the quantum Stokes parameters to describe the quantum self-and cross-correlations between two polarization components of the electromagnetic field generated by this type of lasers. We calculate analytically the fluctuation spectra of these parameters and discuss experiments in which they can be measured. We demonstrate that in certain situations VCSELs can exhibit polarization squeezing over some range of spectral frequencies. This polarization squeezing has its origin in sub-Poissonian pumping statistics of the active laser medium.

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Section: Introductionmentioning

confidence: 99%

Polarization squeezing in vertical-cavity surface-emitting lasers

et al. 2004

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“…The possibility of generating non-classical states of light with sub-shot noise fluctuations (amplitude squeezing) with semiconductor optoelectronic emitters was demonstrated theoretically 3 and experimentally. 4 Since then extensive work with the aim to understand and to improve the squeezing performances of semiconductor lasers [5][6][7][8][9] including vertical-cavity surface-emitting lasers (VCSELs) [10][11][12][13][14][15] has been performed. However, the real world of lasers showed up to be more or less far away from the ideal candidate leading to the fact that 8.3 dB of squeezing 5 still represents the record and that typically between 1 and 3 dB are obtained with experiments in the last years.…”

Section: Introductionmentioning

confidence: 99%

Quantum noise and spatial emission properties of RCLEDs

et al. 2004

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We present results of comprehensive investigations of the intensity noise and the angular-resolved spectral emission characteristics of resonant-cavity light-emitting diodes (RCLEDs), demonstrating an interesting interplay between these two properties. First, we find that the intensity noise of the investigated RCLEDs, detected within a full solid angle of detection, is up to -0.15 dB below the shot noise in a quite large pumping regime, i.e., we demonstrate the successful generation of squeezed states of light with these optoelectronic devices. Second, we investigate the spectral and angular emission characteristics and find that the cavity-like character of the Bragg mirrors and the quantum well active medium manifests itself in a blue shift of the central emission wavelength from 847 nm at zero degree to 825 nm at an emission angle of sixty degree. By varying the temperature we are able to detune the quantum-well emission wavelength and the cavity resonance wavelength and observe a broader angular intensity profile. Third, we measure the angular resolved intensity noise. Its super-shot noise behavior can be explained by anticorrelations between radial components of the output intensity emitted at different angles. Finally, the possible origin of the observed anticorrelations in the angular-resolved intensity noise, as well as possibilities for future trends, applications and the limitations of these non-classical states of light with respect to sensing and spectroscopic applications are discussed.

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“…In general, VCSELs have proven to be suitable devices for the generation of low-noise or even amplitudesqueezed light. 16,17 However, any kind of multimode emission usually strongly affects the noise behavior and can lead to excess noise due to mode competition. Up to now, the noise and mode correlations have been studied in detail for transverse modes in VCSELs.…”

Section: Introductionmentioning

confidence: 99%

Polarization-switching influence on the intensity noise of vertical-cavity surface-emitting lasers

2002

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We experimentally investigate the influence of polarization switching on the intensity noise of transverse single-mode vertical-cavity surface-emitting lasers. We show that a polarization switch always leads to strong noise in the two individual orthogonal polarization modes over a large range of pump current in the vicinity of the switch, whereas the effect on the total emission noise strongly depends on the strength of the coupling between total intensity noise and polarization fluctuations, which is mainly determined by the amount of birefringence. Thus our results demonstrate that the occurrence of a polarization switch can have a strong deteriorating effect on the noise behavior, not only if polarization selection is present, but also on the total emission noise, and therefore has to be considered in future investigations and low-noise applications.

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Amplitude noise squeezed light from polarisation singlemode VCSEL

Cited by 22 publications

References 8 publications

Polarization squeezing in vertical-cavity surface-emitting lasers

Polarization squeezing in vertical-cavity surface-emitting lasers

Quantum noise and spatial emission properties of RCLEDs

Polarization-switching influence on the intensity noise of vertical-cavity surface-emitting lasers

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