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Adjustable light power distribution method based on nanometer grating and distributor thereof

An optical power splitter and optical power distribution technology, which is applied in the field of optical communication, can solve the problems of small tunable range, limited application value, and high degree of polarization correlation, and achieve the effects of being conducive to popularization and application, fewer components, and simplified structure

Active Publication Date: 2006-02-22
GUANGXUN SCI & TECH WUHAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this method is that the tunable range is small, the polarization correlation is high, and the control accuracy is low, so its application value is actually very limited.

Method used

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  • Adjustable light power distribution method based on nanometer grating and distributor thereof
  • Adjustable light power distribution method based on nanometer grating and distributor thereof
  • Adjustable light power distribution method based on nanometer grating and distributor thereof

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Embodiment Construction

[0023] Specific implementation

[0024] figure 1 Show the basic functions of existing nanogratings. For visible light and near-infrared light, when the processing ability of the grating is increased from the micron order to the nanometer order, the light diffraction effect familiar to people in the past disappears completely. This nano-scale grating is not sensitive to the wavelength of incident light, but is very sensitive to the polarization state of incident light. A basic function of the nanograting is to separate the incident unpolarized light into two polarized light beams that are transmitted and reflected. The vibrating surfaces of the two polarized light beams are parallel or perpendicular to the direction of the nano grating bars respectively.

[0025] figure 2 It is a polarization-independent adjustable optical power splitter structure in the prior art, which consists of a single-core collimator, walk-off unit (birefringent crystal), half-wave plate, liquid crystal ...

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Abstract

This invention relates to adjusting light power allotting method and its allotter based on nanometer grating, which is bias polarization splitter to the incidence non-bias light and to the following two beams of polarization light polarization apparatus; after and before splitting, making the reflection beam and transparent beam polarization surface for rotation to change the splitting light.

Description

Technical field [0001] The invention relates to an adjustable optical power distributor, which belongs to the technical field of optical communication. Background technique [0002] Optical power splitters based on fiber couplers have achieved rapid development in recent years. Mainly due to the gradual popularization of fiber optic CATV and fiber to the home (FTTH). Its market demand is increasing. According to RHK's analysis, the market size of optical fiber couplers will increase at an annual rate of over 100% after 2003. Seeing the huge potential of the optical power splitter market, many manufacturers who originally engaged in planar waveguide devices have also actively carried out research and development and market development of similar devices. Its performance and working principle are basically similar to those of fiber optic devices. Generally, optical fiber or waveguide type devices can only provide a fixed splitting ratio. With the development of telecommunications s...

Claims

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Application Information

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IPC IPC(8): G02B27/10G02B6/26H04B10/12
Inventor 刘文曾云陈龙周力兵
Owner GUANGXUN SCI & TECH WUHAN