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Optical multiplexer/demultiplexer device comprising porro prisms

A technology for demultiplexers, optical devices, applied in optics, optical components, light guides, etc., to solve problems such as low obstruction and complexity

Inactive Publication Date: 2016-11-16
米兰综合工科大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The applicant has solved the problem of defining a multiplexer / demultiplexer for beams with different orbital angular momentum, such a device will be efficient and there will be a structure with low hindrance and complexity

Method used

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  • Optical multiplexer/demultiplexer device comprising porro prisms
  • Optical multiplexer/demultiplexer device comprising porro prisms
  • Optical multiplexer/demultiplexer device comprising porro prisms

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Embodiment Construction

[0026] figure 1 A first multiplexer / demultiplexer arrangement 100 is shown comprising a first beam splitter cube BS1, a second beam splitter cube BS2, a first Paul prism reflector PR1 and a second Paul prism reflector PR2.

[0027] In particular, a first beam splitter cube BS1 (referred to as "first beam splitter BS1" for simplicity) and a second beam splitter cube BS2 (referred to as "second beam splitter BS2" for simplicity) in the main direction z 1 -z 2 center alignment, main direction z 1 -z 2 has its own beam-splitting planes L1 and L2 arranged parallel to each other.

[0028] The first beam splitter BS1 and the second beam splitter BS2 are in particular independent of the state of polarization of the beams traversing them.

[0029] The first beam splitter BS1 includes a first input / output port 1 , a second input / output port 2 , a third input / output port 3 and a fourth input / output port 4 . The input / output ports 1-4 coincide with four faces of a cube corresponding...

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Abstract

Described herein is a multiplexer / demultiplexer optical device (100) comprising: a first beam-splitter cube (BS1); a second beam-splitter cube (BS2) optically coupled to the first splitter (BS1); a first Porro-prism reflector (PR1), which is optically coupled to the second splitter (BS2); and a second Porro-prism reflector (PR2), which is optically coupled to the second splitter (BS2) and is structured for introducing into optical beams that traverse it a phase delay depending upon an orbital angular momentum of the optical beams and upon an orientation of the second reflector. The device is a Michelson interferometer structured for obtaining constructive / destructive interference such as to multiplex / demultiplex on / from corresponding input / output ports, on the basis of values of orbital angular momentum, an optical beam comprising a plurality of concentric optical beams with cylindrical symmetry having different values of orbital angular momentum.

Description

technical field [0001] This description deals with multiplexing and demultiplexing operations on beams. Background technique [0002] In optical communication, orbital angular momentum (OAM) is increasingly used as a further property of photons to enable transmission at higher capacities. In this regard, reference may be made to the following papers: [0003] [1] Richardson D.J. et al., Space-division multiplexing in optical fibers, "Nature Photonics", Vol. 7, p. 354 (2013) (Richardson D.J. et al., Space-division multiplexing in optical fibers, Nature Ph., vol.7,354(2013)); and [0004] [2]Wang J. et al., Terabit free-space data transmission using orbital angular momentum multiplexing, "Nature Photonics", Vol. 6, p. 488 (2012) (Wang J. et al., Terabit free-space data transmission employing orbital angular momentum multiplexing, Nature Ph. Vol. 6, 488 (2012)). [0005] In the above-mentioned communication system, in addition to the color label that has been used to develo...

Claims

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Application Information

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IPC IPC(8): G02B6/293
CPCG02B6/29349H04J14/07G02B27/145G02B6/2817H04J14/04G02B6/2766G02B6/2938G02B6/29397G02B6/34G02B27/149
Inventor 马里昂·马丁内利
Owner 米兰综合工科大学
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