Superfocusing of mutimode semiconductor lasers and light-emitting diodes

G. S. Sokolovskii; V. V. Dudelev; S. N. Losev; A. G. Deryagin; V. I. Kuchinskii; W. Sibbett; E. U. Rafailov

doi:10.1134/S1063785012050136

Superfocusing of mutimode semiconductor lasers and light-emitting diodes

G. S. Sokolovskii, V. V. Dudelev, S. N. Losev, A. G. Deryagin, V. I. Kuchinskii, W. Sibbett, E. U. Rafailov

Aston Institute of Photonic Technologies (AiPT)

Research output: Contribution to journal › Article › peer-review

Abstract

The problem of focusing multimode radiation of high-power semiconductor lasers and light-emitting diodes (LEDs) has been studied. In these sources, low spatial quality of the output beam determines theoretical limit of the focal spot size (one to two orders of magnitude exceeding the diffraction limit), thus restricting the possibility of increasing power density and creating optical field gradients that are necessary in many practical applications. In order to overcome this limitation, we have developed a method of superfocusing of multimode radiation with the aid of interference. It is shown that, using this method, the focal spot size of high-power semiconductor lasers and LEDs can be reduced to a level unachievable by means of traditional focusing. An approach to exceed the theoretical limit of power density for focusing of radiation with high propagation parameter M 2 is proposed.

Original language	English
Pages (from-to)	402–404
Journal	Technical Physics Letters
Volume	38
DOIs	https://doi.org/10.1134/S1063785012050136
Publication status	Published - 13 Jun 2012

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title = "Superfocusing of mutimode semiconductor lasers and light-emitting diodes",

abstract = "The problem of focusing multimode radiation of high-power semiconductor lasers and light-emitting diodes (LEDs) has been studied. In these sources, low spatial quality of the output beam determines theoretical limit of the focal spot size (one to two orders of magnitude exceeding the diffraction limit), thus restricting the possibility of increasing power density and creating optical field gradients that are necessary in many practical applications. In order to overcome this limitation, we have developed a method of superfocusing of multimode radiation with the aid of interference. It is shown that, using this method, the focal spot size of high-power semiconductor lasers and LEDs can be reduced to a level unachievable by means of traditional focusing. An approach to exceed the theoretical limit of power density for focusing of radiation with high propagation parameter M 2 is proposed.",

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AU - Sokolovskii, G. S.

AU - Dudelev, V. V.

AU - Losev, S. N.

AU - Deryagin, A. G.

AU - Kuchinskii, V. I.

AU - Sibbett, W.

AU - Rafailov, E. U.

PY - 2012/6/13

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AB - The problem of focusing multimode radiation of high-power semiconductor lasers and light-emitting diodes (LEDs) has been studied. In these sources, low spatial quality of the output beam determines theoretical limit of the focal spot size (one to two orders of magnitude exceeding the diffraction limit), thus restricting the possibility of increasing power density and creating optical field gradients that are necessary in many practical applications. In order to overcome this limitation, we have developed a method of superfocusing of multimode radiation with the aid of interference. It is shown that, using this method, the focal spot size of high-power semiconductor lasers and LEDs can be reduced to a level unachievable by means of traditional focusing. An approach to exceed the theoretical limit of power density for focusing of radiation with high propagation parameter M 2 is proposed.

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Superfocusing of mutimode semiconductor lasers and light-emitting diodes

Abstract

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