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Optical fiber grating tuning device and optical systems

A fiber grating, fiber laser technology, applied in optics, cladding fibers, optical components, etc., can solve problems such as difficult operation

Active Publication Date: 2010-09-22
骆飞 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Optical fiber grating tuning device and optical systems
  • Optical fiber grating tuning device and optical systems
  • Optical fiber grating tuning device and optical systems

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Embodiment Construction

[0022] see figure 1 and figure 2 , in a specific embodiment of the fiber grating tuning device of the present invention, the tuning part is composed of a slider part. Optical fiber 101 carries a fiber grating region 102 and is placed in a defined groove between sliders 111 and 112 . The slider portion is movable relatively a little, and the groove is sized to match the diameter of the fiber. One end 132 of the optical fiber is fixed on the slider 112 , the other end 131 of the optical fiber is fixed on the slider 111 , and the sliders 111 and 112 are placed on a frame 125 . The slider 112 is relatively fixed to the frame 125 , and the slider 111 can move slightly relative to the slider 112 . Under the free condition without force, there is a small gap 103 between the fixed end 131 of the optical fiber and the slider 112 and between the fixed end 132 of the optical fiber and the slider 111, so that the slider 111 can move a little relative to the slider 112 , thereby compr...

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Abstract

The invention relates to a tuning device for wavelength of an optical fiber grating, wherein the optical fiber grating is disposed on a restriction trench of a tuning part which can be relatively movable or deformable in part such that the tuning for wavelength of the optical fiber grating is realized by applying compression or tensile strain on the optical fiber grating. The tuning part may include a first and a second slide block, wherein one end of the optical fiber is secured to the first slide block, while the other end of the optical fiber is secured to the second slide block, a gratingsegment on the optical fiber is placed in a trench between adjacent surfaces of the first and second slide blocks and is restricted within the trench. Proper selection is made to size of the restriction trench so that the optical fiber grating still keeps straight without being bend while being compressed. An actuator can be used for actuating one or two slide blocks in order to apply the controllable strain on the optical fiber, which is to say, to apply the controllable axial compression or tensile strain on the optical fiber grating. Hence, the wavelength of the optical fiber grating can be tuned in accordance with the strain applied thereon.

Description

technical field [0001] The invention relates to an optical fiber device, especially a tunable optical fiber grating. Background technique [0002] Fiber Bragg gratings have many applications due to the property of selecting and controlling the wavelength of light propagating in optical fibers, such as being widely used in optical fiber communication systems, optical fiber sensors, and fiber lasers. A typical fiber grating is formed by introducing periodic small refractive index changes in the fiber core along the length of the fiber. In general, there are two types of fiber gratings: fiber Bragg grating (FBG) and long period fiber grating (LPFG), the difference between long period fiber grating (LPFG) and fiber Bragg grating (FBG) is that the long period fiber grating (LPFG ) grating period is much longer than that of fiber Bragg grating (FBG). [0003] FBG reflection wavelength is λ B light with λ B =2nΛ B , known as the Bragg condition, or Bragg wavelength, where λ B...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/02G02B6/34
CPCG02B6/022H01S3/1053H01S3/1055H01S3/0675
Inventor 骆飞叶东风
Owner 骆飞