It is explained by specific examples that adopting optical coherent detection technology, the capacity of communication can be enlarged in optical transmission, the detection sensitivity can be increased in optical sensors, and the performance can be improved in signal processing.

Aimed at the scattering light signal's characters of Brillouin optical distributed sensor,a detecting scheme using optical coherent detection was developed.

It is explained by specific examples that adopting optical coherent detection technology, the capacity of communication can be enlarged in optical transmission, the detection sensitivity can be increased in optical sensors, and the performance can be improved in signal processing.

Aimed at the scattering light signal's characters of Brillouin optical distributed sensor,a detecting scheme using optical coherent detection was developed.

Multiple scattering and intensity fluctuations in optical coherent tomography of randomly inhomogeneous media

An expression for signal intensity fluctuations in optical coherent tomography has been obtained for the first time in the framework of the theory of the multiple scattering of low-coherent optical radiation in a random medium.

The contribution of the multiple scattering of low-coherent radiation backscattered from a randomly inhomogeneous layer, as well as the speckles of the interference component in optical coherent tomography, has been calculated.

We prove that a mesoscopic Josephson junction, irradiated with a quantum superposition of two -out of phase optical coherent states, exhibits an experimentally observable sensitivity to the quantum coherences of the field state.

Arbitrary superpositions of any two optical coherent states are investigated as realizations of qubits for quantum information processing.

In this paper, recent advances in the research of coherence properties of electromagnetic radiation are discussed. Using the conception of photon degeneracy and degree of coherence the author is able to explain many problems such as light mixing, intensity fluctuations and the properties of coherent light source. Since the occurrence of radiation process is at random, the intensity of the signal generated by the mixing of different sources can be determined by the correlation of radiation processes as derived...

In this paper, recent advances in the research of coherence properties of electromagnetic radiation are discussed. Using the conception of photon degeneracy and degree of coherence the author is able to explain many problems such as light mixing, intensity fluctuations and the properties of coherent light source. Since the occurrence of radiation process is at random, the intensity of the signal generated by the mixing of different sources can be determined by the correlation of radiation processes as derived in the present paper. Regarding photons as bosons, the phenomena "intensity interferense" is explained as quantum fluctuations. The coherence properties of radiation may thus be interpreted well on the basic conception of quantum machanics.

This paper is the first part of a theory of the coherent propagation of light in semiconductors. When the interaction between electrons is neglected we obtain the Bloch equation describing the matrix elements of interband transitions induced by coherent light in semiconductors. The interband transitions in the system are analogous in form to those of an inhomogeneously broadened two-level system, but a particular type of multiphoton process will occur under the action of intense light.

This paper is the second part of a theory of the coherent propagation of light wave in semiconductors. After considering the interaction between electrons, the problem of a semiconductor interacting with light is discussed and the equation of exciton polarization wave excited by light wave is obtained. We point out that the equation can be approximated by a set of linear ones and the exciton polarization wave can be regarded as a Bose field only in the limit of low excitation. In this paper, the problem of coherent...

This paper is the second part of a theory of the coherent propagation of light wave in semiconductors. After considering the interaction between electrons, the problem of a semiconductor interacting with light is discussed and the equation of exciton polarization wave excited by light wave is obtained. We point out that the equation can be approximated by a set of linear ones and the exciton polarization wave can be regarded as a Bose field only in the limit of low excitation. In this paper, the problem of coherent excitation of discrete exciton level is also discussed specifically. It is shown that the discrete exciton level system excited coherently is approximately equivalent to a two-level atom system excited by light wave in which the difference of energy level is dependent on the degree of excitation and the density of equivalent "two-level atoms'' is determined by features of the exciton state wave function.