Wavelength-tunable amplitude-squeezed light from a room-temperature quantum-well laser

Freeman, M. J.; Wang, H.; Steel, Duncan G.; Craig, Ronald A.; Scrifres, Donald R.

doi:10.1364/ol.18.002141

Cited by 64 publications

(16 citation statements)

References 9 publications

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“…In order to suppress the mode partition noise, an extremely high SMSR is needed. The intensity noise level for the standard quantum limit (SQL) of the laser output was measured with a balanced detector [11,12]. The setup is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

Performance improvement of InGaAs quantum well distributed Bragg reflector laser with curved grating

Uemukai

Nozu

Suhara

2007

Electron Comm Jpn Pt II

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SUMMARYPerformance improvement is performed for an InGaAs quantum well DBR laser consisting of a ridge active channel and a curved grating such that single-mode oscillation with high efficiency and high spectral purity can be realized. The waveguide absorption loss is substantially reduced by selectively disordering the quantum well in the DBR region. The curved DBR grating is optimized so that a high reflectivity and sharp wavelength selectivity are obtained simultaneously. In addition, the external differential quantum efficiency is enhanced by optimizing the reflectivity at the output end with a low-reflection coating. In this approach, a single-mode oscillation is realized with a high external differential quantum efficiency of 0.79 and a side mode suppression ratio of 50 dB. In the laser with a window structure near the output end, resistance to catastrophic optical damage is significantly improved and the maximum output is 294 mW.

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Section: Resultsmentioning

confidence: 99%

Performance improvement of InGaAs quantum well distributed Bragg reflector laser with curved grating

Uemukai

Nozu

Suhara

2007

Electron Comm Jpn Pt II

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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%

“…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. [6][7][8][9] Besides the search for a high amount of squeezing with lasers, squeezed light emission has been observed rather simply in light emitting diodes resulting in sub-shot noise emission of up to -3.5 dB at low temperature. [16][17][18] Their advantage is that squeezing is quasi-immune against deterioration effects by spectral and polarization mode interactions.…”

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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“…Freeman et al 8 have shown that a laser in a grating-feedback external cavity can have as much as 3 dB of amplitude squeezing. The drawback of this system is that there is inherent loss from the grating feedback, and direct-current modulation leads to unacceptably large residual amplitude modulation.…”

Section: Introductionmentioning

confidence: 99%

Subshot noise FM spectroscopy with an amplitude-squeezed diode laser at room temperature

1995

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We have developed a sub-shot-noise diode-laser system and used it to perform sub-shot-noise FM spectroscopy. By inducing FM sidebands on a direct-current-modulated external-cavity diode laser and injection locking a slave laser, we have suppressed the residual AM in the master by 50 dB and achieved a noise level 0.8 dB below the shot-noise level. We expect that such techniques will provide useful and practical tools for future precision measurements and novel atom-photon interaction experiments.

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Wavelength-tunable amplitude-squeezed light from a room-temperature quantum-well laser

Cited by 64 publications

References 9 publications

Performance improvement of InGaAs quantum well distributed Bragg reflector laser with curved grating

Performance improvement of InGaAs quantum well distributed Bragg reflector laser with curved grating

Quantum noise and spatial emission properties of RCLEDs

Subshot noise FM spectroscopy with an amplitude-squeezed diode laser at room temperature

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