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Pulley device for improving stimulated Brillouin scattering threshold value of high-power optical fiber amplifier

A fiber amplifier and stimulated Brillouin technology, which is applied in instruments, optics, nonlinear optics, etc., can solve the problems of complex device technology, small fiber expansion, and fiber can no longer be used, and achieves simple processing technology, simple structure, Effect of Raising Scattering Threshold

Inactive Publication Date: 2012-07-11
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The technical problem to be solved by the present invention is to overcome the shortcomings of existing devices such as complex process, unusable optical fiber, and small optical fiber expansion, and propose a pulley device with improved stimulated Brillouin scattering threshold for high-power optical fiber amplifiers

Method used

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  • Pulley device for improving stimulated Brillouin scattering threshold value of high-power optical fiber amplifier
  • Pulley device for improving stimulated Brillouin scattering threshold value of high-power optical fiber amplifier
  • Pulley device for improving stimulated Brillouin scattering threshold value of high-power optical fiber amplifier

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Embodiment 1

[0031] Such as Figure 1 ~ Figure 4 As shown, the pulley device for increasing the stimulated Brillouin scattering threshold of a high-power optical fiber amplifier includes a table 2 , an elliptical cone tube 4 , a large mass sphere 61 , a first mass sphere 62 and a second mass sphere 63 .

[0032] The center of the small mouth end of ellipse tapered pipe 4 is concentric with the desktop of table 2, and the major axis of 4 small mouth ends of ellipse tapered pipe coincides with the centerline of desktop width, and ellipse tapered pipe 4 is fixed on the desktop of table 2.

[0033] The two ends of the major axis of the large mouth end of the elliptical conical tube 4 are respectively fixedly connected to one end of the first steel wire rope 51 and one end of the second steel wire rope 52 .

[0034] The other end of the first wire rope 51 and the other end of the second wire rope 52 are fixedly connected with the mass large ball 61 through the first fixed pulley 21 and the seco...

Embodiment 2

[0046] The pulley device for increasing the stimulated Brillouin scattering threshold of the high-power optical fiber amplifier includes a table 2, an elliptical cone tube 4, a large mass sphere 61, a first mass sphere 62 and a second mass sphere 63.

[0047] The center of the small mouth end of ellipse tapered pipe 4 is concentric with the desktop of table 2, and the minor axis of 4 small mouth ends of ellipse tapered pipe coincides with the centerline of desktop width, and ellipse tapered pipe 4 is fixed on the desktop of table 2.

[0048] The two ends of the short axis of the large mouth end of the elliptical tapered pipe 4 are respectively fixedly connected to one end of the first steel wire rope 51 and one end of the second steel wire rope 52 .

[0049] The other end of the first wire rope 51 and the other end of the second wire rope 52 are fixedly connected with the large mass ball 61 through the first fixed pulley 21 and the second fixed pulley 22 fixed on the side edge ...

Embodiment 3

[0062] The difference between embodiment three and embodiment one:

[0063] The α radian is 0.1, the β radian is 0.1, and the table 2 is made of wood. The mass of the first mass ball 62 and the second mass ball 63 are equal to 10 kg, and the mass of the large ball 61 is 2sinβ / sinα of the mass of the first mass ball 62 . The thickness of the elliptical conical tube 4 is 1.

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Abstract

The invention relates to a pulley device for improving the stimulated Brillouin scattering threshold value of a high-power optical fiber amplifier, belonging to the filed of a high-power narrow linewidth optical fiber laser and a narrow linewidth optical fiber amplifier. The pulley device for improving the stimulated Brillouin scattering threshold value of the high-power optical fiber amplifier overcomes the defects of the existing device, namely the process is complex, the optical fiber can not be reused, the flexibility of the optical fiber is small, and the like. In the invention, two endsof the oval long shaft of the large hole of an oval conical tube (4) are fixedly connected with one end of a first steel rope (51) and one end of a second steel wire rope (52) respectively, the otherend of the first steel rope (51) and the other end of the second steel wire rope (52) are fixedly connected with a big mass ball (61) through a first pulley (21) and a second pulley (22), two ends ofthe oval short axis of the large hole end of the oval conical tube (4) are fixedly connected with a first small mass ball (62) and a second small mass ball (63) respectively through a third steel wire rope (53) and a fourth steel wire rope (54), and the third steel wire rope (53) and the fourth steel wire rope (54) are both vertical to the plane. The pulley device has a simple structure, is simple in machining, and improves the stimulated Brillouin scattering threshold value of rare earth doped fiber (7) which is spirally stuck on the outer side of the oval conical tube.

Description

technical field [0001] The invention relates to a pulley device for increasing the stimulated Brillouin scattering threshold of a high-power optical fiber amplifier, belonging to the fields of high-power narrow-linewidth optical fiber lasers and narrow-linewidth optical fiber amplifiers. Background technique [0002] Stimulated Brillouin scattering is a nonlinear process that occurs in an optical fiber, and its required incident power is much lower than that required by stimulated Raman scattering. Once the Brillouin scattering threshold is reached, stimulated Brillouin scattering will convert the vast majority of the input power into reverse Stokes waves [Govind P. Agrawal, Nonlinear Fiber Optics, Third Edition, San Diego, CA: Academic]. Clearly, stimulated Brillouin scattering limits the maximum power that can be transmitted by an optical fiber. In addition, if the stimulated Brillouin scattering cannot be completely suppressed, it will lead to random changes in the pump ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/365G02F1/35G02F1/39
Inventor 宁提纲胡旭东李晶温晓东郑晶晶冯素春王春灿周倩李林虎
Owner BEIJING JIAOTONG UNIV
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