Triple-port fiber-optical loop unit

A fiber optic circulator and three-port technology, which is applied in the coupling of optical waveguides, can solve the problems of low coupling efficiency, poor stability, and high cost, and achieve the effects of increasing or decreasing the number of ports, good stability, and light weight

Inactive Publication Date: 2007-11-21
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the optical fiber circulator made by this method is that the insertion loss is large: the coupling efficiency between the optical fiber and the crystal is low, and each optical surface will introduce Fresnel reflection loss when the beam is transmitted between the crystals; the stability is poor: the coupling between each optical surface of the crystal The connection causes instability; the cost is high: the cost of grinding the crystal and its optical surface is high; the manufacturing process is complicated: the optical path needs to be adjusted; the number of ports is difficult to increase or decrease: to increase the port, it is necessary to increase the crystal and change the structure accordingly

Method used

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Examples

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Embodiment 1

[0022] Figure 1 shows the 100 three-port all-fiber circulator, 101 is the first port of the 100 three-port all-fiber circulator; 102 is the second port of the 100 three-port all-fiber circulator; 103 is the 100 three-port all-fiber circulator The third port; 104 is the coupling part of the 100 three-port all-fiber circulator.

[0023] Two fibers of different materials are made into a coupler by using the fusion taper technology, so that the light beams in the 101 and 103 fibers are coupled into the 102 fibers, of which 103 and 102 are straight-through arms, and the 101 fiber is the coupling arm. Due to the directional output and directional isolation functions of the coupling part, the beam injected by the 101 fiber only has an output beam in the 102 fiber; when the 102 fiber is used as the input port, the output beam is obtained in the 103 fiber, and the beams from 101 to 102 and 102 to 103 can be circled. Function.

Embodiment 2

[0025] Figure 2 shows a four-port all-fiber circulator composed of four three-port all-fiber circulators, the light beam can be transmitted to the next port in a clockwise direction, 102, 202, 302, and 402 are the four-port all-fiber circulators. ports, 12, 23, 34, and 41 are four connection points between the four three-port all-fiber circulators, and 104, 204, 304, and 404 are the coupling parts of the four three-port all-fiber circulators.

[0026] FIG. 2 shows an embodiment of a four-port all-fiber circulator. The circulator 4000 consists of four three-port all-fiber circulators and four connection points.

[0027] The circulator 4000 performs the following functions: The first function: the light entering the circulator 4000 from the optical fiber 102 is introduced into the optical fiber 202 through the coupling part 104, the optical fiber 103, the connection point 12, the optical fiber 201, and the coupling part 204, realizing the first of the 4000 circulator beam transm...

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Abstract

A circulator of three-port total optical fiber type is prepared coupling the first and the second as well as the third optical fiber ports to each other and using optical fiber material as material of three said ports. The prepared circulator is suitably used on fields of optical fiber communication and optical fiber sense.

Description

Technical field: [0001] The invention relates to a three-port all-fiber circulator of an optical fiber directional transmission device. Background technique: [0002] At present, the known circulator is composed of optical crystals, and the non-reciprocal properties of the crystals are used to complete the directional output of the light beam. Typically, such as patents 03103816.6, 99813795.2, and 03103815.8, the incident beams are processed by birefringent crystals, and then sent to subsequent non-reciprocal devices to realize the beam circulation function. In the above three patents, the beam output from the crystal is coupled into the optical fiber to realize the optical fiber output. The disadvantage of the fiber circulator made by this method is that the insertion loss is large: the coupling efficiency between the fiber and the crystal is low, and each optical surface will introduce Fresnel reflection loss when the beam is transmitted between the crystals; poor stabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/26
Inventor 柳春郁
Owner HEILONGJIANG UNIV
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