Chirp sparkling fiber bragg grating-based wavelength division multiplexing device and machining method thereof
A technology of wavelength division multiplexing devices and blazed fiber gratings, applied in wavelength division multiplexing systems, cladding optical fibers, optical components, etc., can solve the problems of low integration, difficult manufacturing, increased insertion loss and crosstalk, etc. Achieve high integration, good temperature stability, and reduce light scattering
Inactive Publication Date: 2012-11-07
BEIJING JIAOTONG UNIV
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Problems solved by technology
This method can effectively separate the light of different wavelengths from the transmission fiber, but because the light of different wavelengths is radiated from the entire range of the grating, there is only a difference in the output angle, so a larger volume optical module must be used for Convergence, which makes manufacturing difficult, low integration, and also increases the additional insertion loss and crosstalk of the device
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[0027] refer to figure 1 , figure 2 In this embodiment, the wavelength division multiplexing device based on a chirped blazed fiber grating includes: a fluorine-doped silica substrate 104, an optical fiber 101, a chirped blazed grating 102 with an angle of 45° written in the core of the optical fiber 101, and an optical fiber array 103. The axis of the fiber in the fiber array 103 is perpendicular to the fiber 101 , and the grating surface of the 45° chirped blazed grating 102 written in the fiber 101 is at an angle of 45° to the axis of the fiber in the fiber array 103 . The optical fibers in the optical fiber array 103 are densely arranged, and the width is the same as the length of the gate region in the optical fiber 101 . The optical fibers used in the optical fiber 101 and the optical fiber array 103 may be single-mode optical fibers or multi-mode optical fibers, but the optical fibers 101 and the optical fibers in the optical fiber array 103 are both single-mode or mu...
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The invention discloses a chirp sparkling fiber bragg grating-based wavelength division multiplexing device and a machining method thereof. The device comprises a fluorine-doped quartz substrate, an optical fiber inserted into the fluorine-doped quartz substrate, a chirp sparkling grating arranged in the optical fiber and an optical fiber array inserted into the fluorine-doped quartz substrate, wherein the axial direction of the optical fiber in the optical fiber array is perpendicular to the optical fiber, and a grating forming surface of the chirp sparkling grating forms an angle of 45 degrees with the axial direction of the optical fiber in the optical fiber array; the width of the optical fiber array is equal to the length of a grating area formed by the chirp sparkling grating in theoptical fiber; an anti-reflection film is plated on an outer surface corresponding to the optical fiber grating area; and a micro lens is arranged at one end, which is close to the optical fiber, of the optical fiber array, and the anti-reflection film is plated at the end. When the device is used, a group of light with different wavelengths can be coupled, the light with different wavelengths isdistributed along the radial direction of the optical fiber in the grating area, and the light with different wavelengths also can be incident to the sparkling chirp grating area vertically along theaxial direction of the optical fiber according to the reversibility of a light path to realize the multiplexing of the light with different wavelengths; and the chirp sparkling fiber bragg grating-based wavelength division multiplexing device has high continuance and integrated level, small crosstalk among channels and high temperature stability.
Description
technical field [0001] The invention relates to the technical field of optical fiber communication, in particular to a wavelength division multiplexing device based on a chirped blazed fiber grating and a processing method thereof. Background technique [0002] The introduction of wavelength division multiplexing technology effectively broadens the bandwidth of transmission lines in optical fiber communication networks, and is widely used in modern optical fiber communication. The wavelength division multiplexer can decompose a group of wavelengths of light into several wavelengths, and at the same time, according to the reversibility of the optical path, it can also couple the light of several wavelengths together for transmission. Currently, WDMs used in optical fiber communications are mainly divided into three categories: WDMs, dense WDMs, and coarse WDMs. [0003] At present, most of the wavelength division multiplexing devices put into use use the method of bulk optic...
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IPC IPC(8): G02B6/293G02B6/02H04J14/02
Inventor 李琦延凤平彭万敬陶沛琳冯亭
Owner BEIJING JIAOTONG UNIV