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Wavelength division multiplexing/demultiplexing devices using diffractive optic lenses

A diffractive optics and wavelength division multiplexing technology, applied in the direction of diffraction grating, optics, optical elements, etc.

Inactive Publication Date: 2002-10-02
光学芯片公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the cost of making these graded-index lenses is much higher than the cost of making standard uniform-index lenses, even though both types of lenses are usually made from standard optical glass materials

Method used

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  • Wavelength division multiplexing/demultiplexing devices using diffractive optic lenses
  • Wavelength division multiplexing/demultiplexing devices using diffractive optic lenses
  • Wavelength division multiplexing/demultiplexing devices using diffractive optic lenses

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Embodiment Construction

[0042] Reference Figure 1a with 1b , They respectively represent a side view and a top view of the wavelength division multiplexing device in a preferred embodiment of the present invention. The multiplexing device 10 includes: a plurality of input fibers 12, an input fiber coupler 14, a diffractive optical collimator / focus lens 16, a reflective diffraction grating 18, an output fiber coupler 20, and a single output fiber 22. All the above-identified elements in the multiplexing device 10 are arranged along the optical axis X-X of the multiplexing device 10, which will be described in more detail below.

[0043] It should be noted at this time that the input fiber 12 and the output fiber 22, as well as any other fibers described in conjunction with the WDM device according to the present invention, are single-mode fibers. However, this should not limit the WDM device of the present invention to only use single-mode fiber. For example, the WDM device of the present invention may a...

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Abstract

An improved wavelength division multiplexing device (10) is disclosed. The improved wavelength division multiplexing device (10) has a diffraction grating (18) for combining a plurality of monochromatic light beams (24) into one multiplexed polychromatic light beam. The improvement in the improved wavelength division multiplexing device (10) is to utilize a diffractive optical collimating / focusing lens (16) for collimating a plurality of monochromatic light beams (24) propagating along a first direction (24') to a diffraction grating (18), and for converging the multiplexed polychromatic light beam (26) from the diffraction grating (18) propagating along the second direction (26'), wherein the second direction (26') is approximately the same as the first direction (24') on the contrary.

Description

Technical field [0001] The present invention generally relates to wavelength division multiplexing / demultiplexing technology, and in particular to a wavelength division multiplexing / demultiplexing device using a diffractive optical lens. Background technique [0002] Wavelength division multiplexing (WDM) is a fast-growing technology that greatly increases the amount of aggregate data that can be transmitted over optical fibers. Before the use of WDM technology, most optical fibers only transmit a single data channel in a single direction on a wavelength. The basic concept of WDM is to transmit and retrieve multiple data channels separately from a fiber. Each data channel is transmitted with a unique wavelength, and these wavelengths are appropriately selected so that the channels do not interfere with each other, and the optical transmission loss of the optical fiber is very low. Today, commercial WDM systems allow the simultaneous transmission of 2 to 100 data channels. [0003...

Claims

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Application Information

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IPC IPC(8): G02B5/18G02B6/34G02B6/42
CPCG02B6/29307G02B6/2931G02B6/2938G02B6/4215G02B6/4246
Inventor 罗伯特·K·维德
Owner 光学芯片公司
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