Interference Fringes Produced by Superposition of Two Independent Maser Light Beams

Magyar, G.; Mandeļ, L.

doi:10.1038/198255a0

Cited by 159 publications

(87 citation statements)

References 11 publications

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“…This is especially noticeable if one uses a double-slit instead of a double-pinhole. Then the appearance strongly resembles the fringes produced by two independent laser beams [15] This suggests that probably the random stack behaves as a set of independent resonant reflectors. The laser beam "selects" a few plates which are reasonably parallel locally and hence produce good quality fringes.…”

Section: Omentioning

confidence: 92%

Some measurements of the spatial coherence of a giant pulse laser

Magyar

1970

Opto-electronics

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Section: Omentioning

confidence: 92%

Some measurements of the spatial coherence of a giant pulse laser

Magyar

1970

Opto-electronics

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“…However, there is an alternative way to testify the conclusion, which is by employing the cold atoms just above the threshold temperature of BEC [29,30]. It has been proved that there is firstorder interference pattern by superposing two independent BECs [31], which is just the same as the transient interference pattern by superposing two independent laser light beams [3]. If there is a way to superpose two independent cold atomic beams within the coherence time, one could judge whether there is interference pattern or not, which is an analogy of superposing two independent thermal light beams.…”

Section: Figmentioning

confidence: 99%

“…The result suggests that the classical model of thermal light field within the coherence time may not be the same as the one of laser light field within the coherence time.Shortly after the invention of laser [1], the first-order interference of two independent laser light beams was reported [2][3][4]. Magyar and Mandel observed spatial transient first-order interference pattern by superposing two independent ruby laser light beams [3].…”

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Transient first-order interference of two independent thermal light beams

Liu

Bai

et al. 2014

2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS)

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By analyzing the first-order interference of two independent thermal light beams with both classical and quantum theories, we conclude that it is impossible to observe the transient first-order interference pattern by superposing two independent thermal light beams even if the degeneracy parameter of thermal light is much greater than one. The result suggests that the classical model of thermal light field within the coherence time may not be the same as the one of laser light field within the coherence time.Shortly after the invention of laser [1], the first-order interference of two independent laser light beams was reported [2][3][4]. Magyar and Mandel observed spatial transient first-order interference pattern by superposing two independent ruby laser light beams [3]. Transient firstorder interference pattern is the first-order interference pattern obtained in a short time interval, which is usually shorter than the coherence time of the field. Further more, Pfleegor and Mandel proved that the interference of two independent laser light beams takes place even under conditions in which "the intensities are so low that, with high probability, one photon is absorbed before the next one is emitted by one or the other source" [5]. Forrester et al. observed beats by mixing Zeeman components of a visible spectral line [6]. However, their experiment can not be regarded as the interference of two independent thermal light beams. For the interfering fields in their experiment have common origin, which is similar as the latter experiments of interference of light emitted by two sources [7][8][9][10][11]. The transient first-order interference of two independent thermal light beams like the one with two independent laser light beams [2-4] has never been reported. Most physicists attribute it to that the degeneracy parameter of thermal light is usually much less than one [12,13]. On the other hand, if the degeneracy parameter of thermal light is much greater than one, the transient first-order interference pattern of two independent thermal light beams can be observed. Is this prediction true? Our answer is no. In the following part, we will show that it is impossible to observe the transient first-order interference pattern by superposing two independent thermal light beams even if the degeneracy parameter of thermal light is much greater than one. Our results suggest that thermal and laser light fields are different within the coherence time.Thermal light is usually obtained by passing blackbody radiation through linear filters, such as apertures, mirrors, lenses, polarizers, etc [14]. It is also sometimes called chaotic light. Gas discharge lamp is one of the typical thermal light sources, where the different * liujianbin@mail.xjtu.edu.cn excited atoms emit their radiation independently of one another. The total thermal light field equals the sum of all these randomly and independently emitted radiation fields. For example, let us follow Loudon's book to discuss the temporal fluctuation of polarized thermal light emit...

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“…In Refs. [16,17], the two independent light beams are replaced by two monochromatic optical fields with random phases ϕ 1 and ϕ 2 uniformly distributed in [0, 2π]. Therefore, the two independent optical fields propagating in the waveguides can be regarded as an ensemble labeled by the phase difference λ = ϕ 1 − ϕ 2 , which also is a random variable uniformly distributed in [0, 2π].…”

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confidence: 99%

Numerical Simulation of Bell Inequality's Violation Using Optical Transverse Modes in Multimode Waveguides

Shu-Juan

2008

Chinese Phys. Lett.

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We numerically demonstrate that "mode-entangled states" based on the transverse modes of classical optical fields in multimode waveguides violate Bell's inequality. Numerically simulating the correlation measurement scheme of Bell's inequality, we obtain the normalized correlation functions of the intensity fluctuations for the two entangled classical fields. By using the correlation functions, the maximum violations of Bell's inequality are obtained. This implies that the two classical fields in the mode-entangled states, although spatially separated, present a nonlocal correlation.

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Interference Fringes Produced by Superposition of Two Independent Maser Light Beams

Cited by 159 publications

References 11 publications

Some measurements of the spatial coherence of a giant pulse laser

Some measurements of the spatial coherence of a giant pulse laser

Transient first-order interference of two independent thermal light beams

Numerical Simulation of Bell Inequality's Violation Using Optical Transverse Modes in Multimode Waveguides

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