Dynamic light coupler

An optical coupler, dynamic technology, applied in the field of optical communication, can solve the problems of no dynamic optical coupling structure, limited application range, inability to realize beam splitting and beam combining conversion, etc., and achieve the effect of easy operation

Inactive Publication Date: 2005-02-23
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Prior art [1] (J.J.Pan and T. Zhu, "1×N fiber coupler employing diffractive optical element", Electronics Letters 35, No.4, 324-325 (1999)) once proposed to realize 1×N fiber coupler using diffractive optical element Fiber coupling structure, but no dynamic optical coupling structure is proposed, that is, this structure can only realize optical beam splitting, not optical beam combining, nor can it realize the conversion between beam splitting and beam combining
Prior Art [2] (Zhou Changhe, Zhao Xin, Liu Liren, "Dynamic Coupler Used in Optical Communication", Application Dat

Method used

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Embodiment Construction

[0040] See first figure 1 , figure 1 It is a specific embodiment of the present invention. It can be seen from the figure that the composition of the dynamic optical coupler of the present invention is: an input fiber group 1, a collimating lens group 2, a Daman grating phase plate 3, and a converging lens 4 in order on an optical path. And output fiber group 5. The input fiber group 1 is placed on the front focal plane of the collimating lens 2, the phase plate 3 is placed on the back focal plane of the collimating lens group 2, which is also the front focal plane of the converging lens 4, and the output fiber group 5 is placed on the converging lens. On the back focal plane of the lens 4, the number of fibers in the two fiber groups can be the same or different, denoted as N and M. The output fiber group 5 is provided with a self-collimating lens 6. The phase plate 3 has a mover 7. The numerical aperture of the condenser lens 4 matches that of the autocollimating lens.

[0041...

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Abstract

A dynamic light coupler consists of input optical fibre set, collimation lens set, Daman grating phase plate, convergent lens and output optical fibre set in sequence on one light path. It is featured as setting input optical fibre set on front focal plane of collimation lens, phase plate at back focal plane, output optical fibre set on back focal plane of convergent lens; overlapping convergent lens front focal plane to back focal plane of collimation lens set.

Description

Technical field [0001] The present invention relates to optical communication, in particular to a dynamic optical coupler, which utilizes a Dammam grating of a diffractive optical element to realize a large number of dynamic optical couplings and optical splitting. Background technique [0002] With the development of technology and society, people's demand for information is gradually increasing. Optical fiber communication surpasses traditional cable communication with its advantages of high speed, large capacity, good confidentiality, and low cost. It is the development direction of communication technology in the 21st century. How to realize the dynamic optical coupling technology from N-way to M-way and N-way to single-way has become a key issue for accelerating the development of optical communication technology. [0003] At present, the beam splitting in optical communication mostly uses conventional fused-taper fiber couplers, which are characterized by low loss, simple s...

Claims

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Application Information

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IPC IPC(8): G02B6/26
Inventor 周常河底彩慧
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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