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Method of homogenization, depolarization and decoherence of optical signal transmitted in multimode fiber

A technology for multimode optical fiber and light transmission, applied in the field of optical fiber communication, it can solve the problems of mechanical strain of devices, multimode optical fiber loss measurement, multimode optical fiber expansion and application problems, poor uniformity and no depolarization, etc., so as to reduce damage, Conducive to long-term stable trouble-free operation and the effect of reducing the probability of loss

Inactive Publication Date: 2011-06-01
SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD
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Problems solved by technology

Most of these solutions use vibration components to directly contact the controlled device, which is likely to cause mechanical damage to the device, and there is a certain degree of difficulty in implementation.
However, the direct use of fixed beam homogenizers has disadvantages such as poor uniformity and no depolarization, which undoubtedly brings troubles to the loss measurement of multimode fibers and the expanded application of multimode fibers.

Method used

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  • Method of homogenization, depolarization and decoherence of optical signal transmitted in multimode fiber
  • Method of homogenization, depolarization and decoherence of optical signal transmitted in multimode fiber

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0015] Such as figure 1 As shown, in the embodiment, a section of multimode optical fiber 3 is wound on the fiber confinement ring 2, and then vertically placed in the ultrasonic oscillator 1 immersed in the immersion liquid 4. The impregnated liquid 1 can realize the lossless support to the multimode fiber 3, so that the oscillation signal of the ultrasonic oscillator 1 oscillating at high frequency can be effectively applied to the multimode fiber 3, which will make the laser light entering from the input port flow at the output port Achieve homogenization, depolarization and decoherence output.

[0016] The density of the immersion liquid can be close to that of the multimode optical fiber, or it can be quite different. The immersion liquid may be a liquid that does not corrode and damage the optical fiber, such as water.

[0017] Further...

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Abstract

The invention discloses a method for homogenization, depolarization and decoherence of optical signal transmitted in a multimode fiber. In the method, the multimode fiber is mainly arranged in a liquid of an ultrasonic oscillator, a reflection mode of a reflection light of the ultrasonic oscillator in an optical fiber is dramatically changed by utilizing vibration generated by liquid ultrasonic waves, and finally, the function that an output laser mode field flops in high frequency among various modes is fulfilled, thereby acquiring the output effects of homogenization, depolarization and decoherence of transmitted optical signal at the optical fiber output end. When lasers are used to carry out reflection transmission for many times in the multimode fiber, the characteristic that an output mode field can change relative to an input mode field can be achieved, the damage of the multimode fiber can be reduced as much as possible through the protection action of ultrasonic impregnating solution and the equipment can run stably for a long time without fault.

Description

technical field [0001] The invention relates to the field of optical fiber communication, in particular to a method for homogenizing, depolarizing and decohering optical signals transmitted in a multimode optical fiber. Background technique [0002] Optical fibers have many applications in the fields of optical communication and optical detection, especially multimode optical fibers, which have important applications in short-distance communication. With the deepening of the application, the accurate measurement of the transmission loss of the multimode fiber and other application methods of the multimode fiber have gradually received more attention. For the measurement of the transmission loss of multimode fiber, since this loss includes mode loss, polarization-dependent loss and coherence loss, it is necessary to use homogenized, depolarized and decoherent lasers for testing, otherwise there will be Violent fluctuations make it impossible to obtain accurate measurements. ...

Claims

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Application Information

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IPC IPC(8): G02B27/09G02B27/28H04B10/13H04B10/2581
Inventor 吴砺胡豪成林江铭
Owner SHANGHAI BRANCH FUZHOU GAOYI COMM CO LTD
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