Optical comb interferometer with adjustable center wavelength and channel spacing

A channel spacing and center wavelength technology, applied in light guides, optics, instruments, etc., can solve problems such as high cost, non-tunability of center wavelength and channel spacing, and limited application, and achieve low cost, simple structure, and expanded application space Effect
CN103630975BInactive Publication Date: 2015-12-23NORTH CHINA UNIVERSITY OF TECHNOLOGY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTH CHINA UNIVERSITY OF TECHNOLOGY
Publication Date
2015-12-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a central wavelength and channel interval tunable optical-comb-shaped interferometer, which belongs to the field of fiber communication, and solves the problems of a present optical-comb-shaped interferometer including incapability of tuning the central wavelength and channel interval, high cost and limited application. In the optical-comb-shaped interferometer, the two ends of a doped fiber (1) are respectively connected in-line ports of a first 2*1 optical coupler (21) and a second 2*1 optical coupler (22), bifurcated ports (211, 221) of the first and second 2*1 optical couplers are respectively connected with a first long period grating (11) and a second long period grating (12) via a first optical isolator (61) and a second optical isolator (62), and the second long period grating is connected with an optical band-stop filter (7); and input ports of a first light modulator (41) and a second light modulator (42) are respectively connected with a first pump light source (31) and a second pump light source (32), modulation ports of the first and second light modulators are connected with a signal generator (5), and output ports of the first and second modulators are respectively connected with bifurcated ports (212, 222) of the first and second 2*1 optical couplers.
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Description

technical field

[0001] The invention relates to the field of optical fiber communication, in particular to an optical comb interferometer with adjustable center wavelength and channel spacing. Background technique

[0002] With the rapid development of optical fiber communication technology and the maturity of multimedia communication technology, people's demand for high speed and broadband is increasing. Optical wavelength division multiplexing (WDM) can greatly reduce the cost of network construction by coupling multiple optical signals of different wavelengths into one optical fiber for transmission without setting up new optical fiber lines. However, with the continuous reduction of the channel spacing of Dense Wavelength Division Multiplexing (DWDM), the pressure on the performance of filter devices at network nodes is becoming the main obstacle restricting the further increase of the number of channels in DWDM systems. And born.

[0003] The optical comb interferomet...

Claims

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