Plateau type wavelength division multiplexer of pass band realized by three point focusing

A wavelength division multiplexing device and flat-top technology, applied in the field of optical communication wavelength division multiplexing, can solve the problems of limited relative bandwidth, device application limitations, difficult to control passband ripple, etc., and achieve compact device structure and dispersion characteristics. Good results
CN1236337CInactive Publication Date: 2006-01-11ZHEJIANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
ZHEJIANG UNIV
Publication Date
2006-01-11
Estimated Expiration
Not applicable · inactive patent

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Abstract

This invention relates to a flattop path-band WDM device realized by three points focusing including input waveguides, free propagation zone, diffraction grating and output waveguide in which the input and output waveguides are at a side of the free propagation zone and the diffraction grating is at the other side. There is a certain phase difference between different grating teeth to the sum of light path of input-output center points and three corresponding output centers are in the entire grating which distances of focusing points are determined by the desired path-band width, and three subgrating are staggeredly arranged and teeth number proportion is determined by the distance of focusing points.
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Description

technical field

[0001] The invention belongs to the technical field of optical communication wavelength division multiplexing, in particular to a wavelength division multiplexing device with frequency response of wide passband and extremely low ripple. Background technique

[0002] Wavelength division multiplexing / demultiplexing technology is the key technology of modern optical fiber communication technology. Wavelength division multiplexing / demultiplexing refers to the combination of light of different wavelengths into composite light and the separation of light of different wavelengths in the composite light through special technology. A wavelength division multiplexing (demultiplexing) device is a device that implements wavelength division multiplexing / demultiplexing technology. Diffraction etched grating is a very typical integrated wave division multiplexing device. Compared with other wave division multiplexers, diffraction etched grating h...

Claims

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