Producing method for holographic Fresnel congested wavelength division multiplexer
A Fresnel holography and wavelength division multiplexer technology, applied in the Fresnel holography dense wavelength division multiplexer and its manufacturing field, can solve the problems of long design and manufacturing process, unsuitable isolation, low output, etc. problems, to achieve the effect of saving assembly components, low cost and high production rate
Inactive Publication Date: 2006-05-17
XIAMEN UNIV
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In addition, the design and manufacturing process of this device is long, and the output is low. When epoxy resin is used in the optical path, the isolation should not be very high, and the bandwidth should not be very narrow.
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[0034] The following embodiments will further illustrate the present invention in conjunction with the accompanying drawings.
[0035]The Fresnel holographic dense wavelength division multiplexer mentioned in the present invention is based on the classic coherent light interference theory and diffraction theory, and is made by laser holographic technology. Coat a layer of photoresist (photoresist or photopolymer or DCG material, etc.) ~50°) to form an off-axis Fresnel lens structure.
[0036] Its manufacturing process, steps, conditions, process and the structure of its manufacturing device are as follows: Figure 1~6 shown. There is a blue or violet laser LASER with a wavelength that is sensitive to the recording material; M is a reflector; BS is an adjustable beam splitter; SF is a beam expander and a spatial filter; FH is a recording material, which can be a photoresist plate (Photoresist) , photopolymer (Photopolymer) or DCG material; L is a lens or camera lens coated w...
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It relates to a dense wavelength division multiplexer, which is provided with thin glass, and a recording material with an off-axis Fresnel lens structure is provided on the glass. Its manufacturing method is to coat the recording material on the glass sheet; use spherical wave and plane wave; and process through exposure and development. The manufacturing device is equipped with a laser; a beam splitter and a reflector, and the beam splitter divides the reflected light into two beams, which are respectively sent to the object light and interference light generation device; the object light generation device is equipped with a total reflection mirror and a filter, The object light passes through the total reflection mirror and then passes through the filter to reach the recording medium; the interference light generating device is equipped with a total reflection mirror and a filter, and the other beam of light distributed to the interference light generating device by the beam splitter passes through the total reflection mirror and then passes through the recording medium. The filter reaches the recording medium and interferes with the object light. Large channel capacity, large number of channels; small insertion loss; it also has the functions of demultiplexing and coupling; compared with the expansion of large-capacity optical fibers in the future, it has the characteristics of low cost, small insertion loss, and high production rate.
Description
technical field [0001] The invention relates to a dense wavelength division multiplexer, in particular to a Fresnel holographic dense wavelength division multiplexer and its manufacturing method and device. Background technique [0002] In the field of optical communication, in recent years, various companies in the world have set their sights on DWDM (WavelengthDivision Multiplexing) technology. This is because DWDM technology has the following advantages: (1) Capacity can be expanded without installing new optical fibers, which reduces network costs. (2) The network can be upgraded and expanded at any time to meet the requirements of users and new services in the future. [0003] At present, the existing DWDM includes grating type wavelength division multiplexer, dielectric film type wavelength division multiplexer, fusion cone type wavelength division multiplexer, integrated optical waveguide wavelength division multiplexer and so on. [0004] 1. Grating type wavelength...
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IPC IPC(8): H04J14/02G02B6/24
Inventor 刘守张向苏刘川任雪畅
Owner XIAMEN UNIV