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Fiber integrated type Mach-Zehnder interferometer and its production method

A manufacturing method and integrated technology, applied in the field of optical fiber, to achieve the effect of reducing volume, simplifying and compacting the system

Inactive Publication Date: 2008-01-16
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the case of high mechanical stability and temperature stability requirements for the interferometer, it is difficult for the fiber Mach-Zehnder interferometer composed of discrete optical structures to meet such requirements

Method used

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  • Fiber integrated type Mach-Zehnder interferometer and its production method
  • Fiber integrated type Mach-Zehnder interferometer and its production method

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specific Embodiment

[0027] Referring to FIG. 1 , this embodiment includes a single-mode single-core input fiber 1 , a split taper coupling region 2 , a single-mode dual-core fiber 3 , a light-combining taper coupling region 4 and a single-mode single-core output fiber 5 . The input optical fiber 1 , the single-mode single-core output optical fiber 5 and the single-mode dual-core optical fiber 3 are connected through the light-splitting tapered coupling region 2 and the light-combining tapered coupling region 4 .

[0028] Referring to Fig. 3, in the process of implementing the fiber-integrated Mach-Zehnder interferometer, firstly, the single-optical path and double-optical path of the light wave are constructed by connecting the single-mode single-core fiber 1 and a section of single-mode double-core fiber 3, and then through the A taper is implemented at the solder joint to realize the coupling and splitting of single optical path to double optical path. In the process of splicing and tapering th...

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Abstract

The invention discloses Mach-Zehnder interferometer integrated in an optical fiber and the manufacture method thereof; two sections of single core optical fibers are respectively provided on two sides Mach-Zehnder interferometer, and one section of two-core optical fiber in the middle of Mach-Zehnder interferometer are welded and tapered, and hence the Mach-Zehnder interferometer is formed; the Mach-Zehnder interferometer comprises a single mode single core input optical fiber (1), a light splitting taper-shaped coupling area (2), a single mode double-core optical fiber (3), a light composite taper-shaped coupling area (4) and a single mode single core output optical fiber (5); the single mode single core input optical fiber (1), the single mode single core output optical fiber (5) and the single mode double-core optical fiber (3) are connected with each other through the light splitting taper-shaped coupling area (2) and the light composite taper-shaped coupling area (4). The invention has the advantages that interferometer has great stability, avoids the variation positions of all moveable parts because of assembly, fixing and regulation, reduces the volume of the interferometer and makes the system more simple and more compact; as the optical path differences of two interference arms positioned in the double-core optical fiber are very small, the invention doesn't need huge mutual coherence of light source and can implement auto-compensation of optical paths of the two interference arms.

Description

(1) Technical field [0001] The invention relates to a Mach-Zehnder interferometer integrated into a single optical fiber and a manufacturing method thereof, belonging to the technical field of optical fibers. (2) Background technology [0002] A common fiber Mach-Zehnder interferometer consists of two independent and separate fiber-optic interference arms. For example, T.R. Burton, C.V. Klein, S. Daliotis, M.C. Mandy, D.W. Stowe patent application for invention "Applying Small Bent Fiber Mach-Zehnder Interferometer" (January 2001 Authorized on the 10th, publication number: CN 1279395A). In this interferometer, the light emitted by the light source is split into two bundles after passing through a 3dB 2×2 fiber coupler, which are coupled into two separate fiber arms, and then passed through another 3dB 2×2 fiber coupler. Then, the interference is realized in the optical fiber coupler, and the interference optical signal is converted into an electrical signal and amplified a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/28
Inventor 苑立波刘志海杨军
Owner HARBIN ENG UNIV
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