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Observation of photon bunching near the threshold of laser diode

HJ Lim, BH Ahn, Jy Kim +1 more

Aug 1, 20100 citations

Direct detection of photon bunching

Yujiang Qu, Surendra Singh

Second-harmonic generation (SHG) has been predicted to be very sensitive to photon bunching. Because of its two-photon nature SHG would be more efficient with bunched than with random or antibunched photon sequences of the same mean intensity. We use this phenomenon to demonstrate the bunching of photons in time. The fundamental beam, derived from a laser operating near threshold, was focused into a 90° temperature phase matched nonlinear crystal. The operating point of the laser was varied in the neighborhood of threshold, and a feedback loop stabilized its intensity at each operating point. It is well known that the character of laser light changes in passing the threshold of laser action. Underlying photon sequences are bunched below threshold and random above threshold.Second-harmonic generation (SHG) has been predicted to be very sensitive to photon bunching. Because of its two-photon nature SHG would be more efficient with bunched than with random or antibunched photon sequences of the same mean intensity. We use this phenomenon to demonstrate the bunching of photons in time. The fundamental beam, derived from a laser operating near threshold, was focused into a 90° temperature phase matched nonlinear crystal. The operating point of the laser was varied in the neighborhood of threshold, and a feedback loop stabilized its intensity at each operating point. It is well known that the character of laser light changes in passing the threshold of laser action. Underlying photon sequences are bunched below threshold and random above threshold.

Annual Meeting Optical Society of AmericaJan 1, 19910 citations

Photon bunching in a laser at threshold.

C. O. Alley, Ren Fang Chang, Robert W. Detenbeck +2 more

He-Ne laser light intensity distribution cumulants for nonlinear oscillation threshold operation

Physics Letters AAug 14, 19670 citations

Enhanced photon bunching from a saturable absorber

Jacek Chrostowski, Jerzy S. Krasiński

Physics Letters AMar 1, 19788 citations

Photon Statistics of a Random Laser

C. W. J. Beenakker

arXiv:quant-ph/9808066Springer eBooksJan 1, 19999 citations

Quantum sensing using thermal photon bunching

Peng Kian Tan, Xi Jie Yeo, Li Jiong Shen +1 more

Classical sensing techniques such as range finding and clock synchronization use timing modulated light sources to provide the timing correlations needed for their implementation. Corresponding quantum schemes utilise spontaneous parametric down converted light sources to provide the timing correlations without the need for timing modulation, although entangled states are too fragile to be fully exploited presently. Here we demonstrate the use of thermal light as an alternative source for timing correlations, via the photon bunching generated from a laser operating below threshold, and showcase its practical viability by successful range finding measurements.Classical sensing techniques such as range finding and clock synchronization use timing modulated light sources to provide the timing correlations needed for their implementation. Corresponding quantum schemes utilise spontaneous parametric down converted light sources to provide the timing correlations without the need for timing modulation, although entangled states are too fragile to be fully exploited presently. Here we demonstrate the use of thermal light as an alternative source for timing correlations, via the photon bunching generated from a laser operating below threshold, and showcase its practical viability by successful range finding measurements.

Quantum Communications and Quantum ImagingJul 30, 20210 citations

Photon bunching in a laser at threshold

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