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Optical wavelength division multiplexer/demultiplexer having preformed passively aligned optics

A wavelength division multiplexer and demultiplexer technology, applied in the field of optical communication, can solve the problems of reduced filtering accuracy, reduced filtering performance, attenuation, etc., and achieve the effect of minimizing optical loss

Inactive Publication Date: 2006-06-21
ORMON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This design has inherent disadvantages
First, each fiber must integrate the signal across its width, resulting in less accurate filtering due to variations in its thickness (and wavelength sensitivity) across its width
Second, the thickness of the interference filter may vary between different devices, degrading its filtering performance
Also, since the waveguide is so wide, the waveguide has a large angular capacity, which results in a "roll-off" or variable filter response

Method used

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  • Optical wavelength division multiplexer/demultiplexer having preformed passively aligned optics
  • Optical wavelength division multiplexer/demultiplexer having preformed passively aligned optics
  • Optical wavelength division multiplexer/demultiplexer having preformed passively aligned optics

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Embodiment Construction

[0026] figure 1 -4 represents the combined wavelength division multiplexer / demultiplexer 10 according to the present invention. Figure 5-7 Represents important components of multiplexer 10 prior to assembly. The present invention enables separate optical signals to be combined into a single optical path, which can be directed to an optical fiber, and / or demultiplexed, into separate channels. In order to simplify the explanation, the demultiplexing functions are described in detail, as the relevant multiplexing functions will be readily understood by those skilled in the art.

[0027] figure 1 The assembled basic components are shown, and optical paths 90-96 are illustrated, where the incident signal includes eight separate wavelengths (typically n wavelengths), divided into eight separate channels for the photodetector (Fig. not shown) for readout. The optical block 20 may be formed of glass or molded from plastic, with a plurality of filters 40 on its lower surface 22 ...

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Abstract

An optical wavelength division multiplexer and de-multiplexer for single mode or multi-mode fiber optic communication systems is provided. The device includes in its preferred embodiment a prefabricated optical block having a reflective coating on its flat upper surface and a plurality of n filters carried on its flat lower surface. A molded plastic coupling module has a flat upper surface to which the optical block and filters are adhesively mounted and the coupling module also includes a lower surface having a plurality of n aspheric lenses. In the preferred embodiment, a fiber optic cable receptacle is molded to the coupling module along with a collimating lens and a beam reflector so that, when the components are assembled, the optical pathway is passively aligned and no postfabrication alignment adjusting or tuning is required.

Description

[0001] This application is filed on June 13, 2000, with application number 00809807.7 (PCT / US00 / 16529), entitled "Optical Wavelength Division Multiplexer / Demultiplexer with Prefabricated Passive Alignment Optics" Divisional application of invention patent application. technical field [0002] The present invention relates to optical communications. More precisely, the present invention relates to an optical multiplexing device with a passively aligned molded optical component to spatially disperse collimated multi-wavelength light from an optical fiber into individual wavelength bands. In a preferred embodiment, the improved multiplexing apparatus of the present invention is particularly suitable for wavelength division multiplexing systems for fiber optic data communication and radio communication systems. Background technique [0003] In a wavelength division multiplexed optical communication system, many different optical wavelength carriers provide independent communica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/26G02B6/34G02B5/28G02B6/36G02B6/38G02B6/42H04B10/12H04J14/02H05K1/02H05K3/36
CPCG02B6/29358G02B6/29367G02B6/2938G02B6/3865G02B6/4214G02B6/4246G02B6/4292H05K1/0237H05K3/361Y10S439/931H05K2201/10121
Inventor 埃里克·B·格兰
Owner ORMON CORP
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