CN2791666Y - Compact all-optical-fiber 90 degree phase position delaying devic - Google Patents
Compact all-optical-fiber 90 degree phase position delaying devic Download PDFInfo
- Publication number
- CN2791666Y CN2791666Y CN 200520072269 CN200520072269U CN2791666Y CN 2791666 Y CN2791666 Y CN 2791666Y CN 200520072269 CN200520072269 CN 200520072269 CN 200520072269 U CN200520072269 U CN 200520072269U CN 2791666 Y CN2791666 Y CN 2791666Y
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- optical fiber
- phase delay
- phase position
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- fiber
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Abstract
The utility model relates to a compact all-optical-fiber 90 DEG phase position delaying device which is formed by the connection of linear polarization maintaining optical fiber and a phase position delaying device, wherein the phase position delaying device is optical fiber of which the phase position is delayed for 90 DEG and the used length of the phase position delaying device is odd number times of one fourth of the conducting wavelength of the phase position delaying device. An optical axis of the linear polarization maintaining optical fiber forms an angle of 45 DEG with an optical axis of the optical fiber of the phase position delaying device. The utility model can obtain circularly polarized light from linearly polarized light in the optical fiber, and can form a circularly polarized light polarizer by using the optical fiber. The in-line type compact full-optical-fiber device ensures that a circular polarizer is miniaturized and has the function of vibration prevention. The utility model has the advantages of small size, convenient operation, simple structure, firm and reliable use and stable performance.
Description
Technical field
The utility model patent relates to the full optical fiber of a kind of tight type 90 degree phase delay devices, or is called the full optical fiber circularly polarized light of tight type and rises partially/analyzer.This optical device rises partially/analyzer as the optical fiber circularly polarized light, makes the linearly polarized photon of input change circularly polarized light output into, in the realization optical fiber polarization state of light is controlled.
Background technology
The full optical fiber circularly polarized light of tight type rises partially/analyzer (being designated hereinafter simply as the optical fiber circle polarizer).The development that polarization state of light in the optical fiber is controlled along with optical fiber communication and light sensing technology manifests its importance day by day.90 degree phase delay devices in the optical devices such as present full-optical fiber optical interferometer are that the circularly polarized light polarizer is to be made of discrete birefringece crystal material or optical fiber coiling.Discrete crystal element needs complicated optical fiber input and output coupled structure, costliness and poor stability, and light energy losses is big.Then complex structure is and too fat to move for fiber optic coils, and stability and reliability are all poor.Another kind of utilize phase delay device that polarization maintaining optical fibre causes, make that the phase delay precision is relatively poor then because of the restriction of fiber optic materials and manufacturing process is difficult to realize the optical axis deflection angle exactly.
01118304.7 a kind of optical phase delay device is provided, be not that the birefringece crystal parallel beam splitter sheet of 0 ° or 90 ° rearranges along logical light face normal direction adjacent parallel by the angle of two optical axis directions and logical light face normal direction.For setted wavelength, by thickness and the optical axis direction of selecting two parallel beam splitter sheets, the two bundle polarized lights that the first parallel beam splitter sheet is separated are combined into a branch of light again in the second parallel beam splitter sheet, the optical path difference of two bundle polarized lights in two parallel beam splitter sheets can realize required phase delay.Optical phase delay device of the present invention is convenient to design, makes and is used, and is a kind of broad-spectrum basic optical device.But not the full light phase delayer of a kind of tight type.
Patented claim CN02816854.2 is a kind of optical current or magnetic field sensor, has a sensor head, and this sensor head comprises first phase delay element (13), second phase delay element and sensor fiber (15).This two phase delay elements (13) optics is connected to the relative two ends of sensor element (15), and the phase delay angle ρ at least one phase delay element (13) departed from angle ε with respect to 90 °, and ε ≠ 0 °.Linear polarized beams (3) incides first phase delay element (13), and the polarization axle of these linear polarized beams (3) (y ') forms an angle with the main shaft (y) of first phase delay element (13), angle Δ α has been departed from respect to 45 ° in this angle, and Δ α ≠ 0 °.Angle Δ α is selected as a function that is angle ε at least.The selection of this diagonal angle Δ α make might compensate because the angle ε ≠ 0 ° direct measuring-signal that is caused and want measured currents or magnetic field between non-linear.But the full optical fiber cable polarized light of the undeclared tight type polarizer.
But the development that polarization state of light in the optical fiber is controlled along with optical fiber communication and optical fiber sensing technology manifests its importance day by day.Controlling more flexibly for polarization state of light in the optical fiber to have the full optical fiber of tight type 90 degree phase delay devices.The combination that has had tight type optical fiber to justify the polarizer and the inclined to one side polarizer of optical fiber cable just can be accomplished the control fully to polarization state of light in the optical fiber, to satisfy the especially demand of optical fiber sensing technology of growing optical fiber communication.
Summary of the invention
The purpose of this utility model is: provide a kind of tight type full optical fiber 90 degree phase delay devices, so that obtain circularly polarized light in optical fiber.Especially provide a kind of simple in structure and rise partially and the respond well and tight type optical fiber circle polarizer of analyzing.
The full optical fiber of tight type 90 degree phase delay devices is characterized in that: keep optical fiber and phase delay device to be connected to form by linear polarization, phase delay device is the optical fiber of 90 degree phase delays, and used length is conducted 1/4 odd-multiple of wavelength for it.Linear polarization keeps optical axis to become miter angle with the optical axis of phase delay device optical fiber.The other end of phase delay device optical fiber connects circular polarization and keeps optical fiber as output port or directly as output port.Linear polarization keeps optical fiber as input port interface (for example FC/PC/APC) can be arranged, and also can not have; Circular polarization keeps optical fiber can have interface (for example FC/PC/APC) also can not have as output port.Linear polarization keeps optical fiber to be used for the incoming line polarized light, through being transformed into circularly polarized light output after the full optical fiber phase retardation device.
The utility model is the full optical fiber 90 degree phase delay devices of a kind of online (in-line) tight type, or claims the full optical fiber circularly polarized light of tight type to rise partially/analyzer.
The utility model has been realized obtaining circularly polarized light from linearly polarized light in optical fiber, has only just constituted the circularly polarized light polarizer with optical fiber.This is the full optical fibre device of a kind of online tight type, makes the miniaturization more of the round polarizer, anti-vibration, and volume is very little, and is easy to use, simple in structure, solid and reliable, stable performance.Present technical foundation makes the manufacturing technology of the full optical fiber cable polarized light of the tight type polarizer ripe.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Adopt linear polarization to keep optical fiber to make.Linear polarization keeps the input port of optical fiber as full optical fiber 90 degree phase delay devices, and phase delay device is that optical fiber is made, and linear polarization keeps optical axis to become miter angle with the optical axis of phase delay device optical fiber; The other end of phase delay device optical fiber connects circular polarization and keeps optical fiber as output port or directly as output port.Wherein the optical fiber of 90 degree phase delay devices are that the linear polarization of specific wavelength keeps optical fiber, and used length is conducted 1/4 odd-multiple of wavelength for it.As the odd-multiple between thousands of.
Linear polarization keeps optical fiber as input port interface can be arranged; Circular polarization keeps optical fiber as output port interface (for example FC/PC/APC) can be arranged.Linear polarization keeps optical fiber to be used for the incoming line polarized light, through being transformed into circularly polarized light output after the full optical fiber phase retardation device.
Claims (4)
1. the full optical fiber of tight type 90 degree phase delay devices is characterized in that keeping optical fiber and phase delay device to be connected to form by linear polarization, and phase delay device is the optical fiber of 90 degree phase delays, and used length is conducted 1/4 odd-multiple of wavelength for it.
2. by the full optical fiber 90 degree phase delay devices of the described tight type of claim 1, it is characterized in that linear polarization keeps optical axis to become miter angle with the optical axis of phase delay device optical fiber.
3. by the full optical fiber 90 degree phase delay devices of the described tight type of claim 1, it is characterized in that the other end of phase delay device optical fiber connects circular polarization maintenance optical fiber as output port or directly as output port.
4. by the full optical fiber 90 degree phase delay devices of the described tight type of claim 1, it is characterized in that linear polarization keeps optical fiber to be provided with interface as input port; Circular polarization keeps optical fiber to be provided with interface as output port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520072269 CN2791666Y (en) | 2005-06-02 | 2005-06-02 | Compact all-optical-fiber 90 degree phase position delaying devic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520072269 CN2791666Y (en) | 2005-06-02 | 2005-06-02 | Compact all-optical-fiber 90 degree phase position delaying devic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2791666Y true CN2791666Y (en) | 2006-06-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520072269 Expired - Lifetime CN2791666Y (en) | 2005-06-02 | 2005-06-02 | Compact all-optical-fiber 90 degree phase position delaying devic |
Country Status (1)
| Country | Link |
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| CN (1) | CN2791666Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107544113A (en) * | 2017-10-20 | 2018-01-05 | 上海理工大学 | Optical switch device based on Helical Fiber |
| CN109633814A (en) * | 2019-01-15 | 2019-04-16 | 浙江大学 | A kind of true zero level integrated type optical waveguide half-wave plate |
-
2005
- 2005-06-02 CN CN 200520072269 patent/CN2791666Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107544113A (en) * | 2017-10-20 | 2018-01-05 | 上海理工大学 | Optical switch device based on Helical Fiber |
| CN109633814A (en) * | 2019-01-15 | 2019-04-16 | 浙江大学 | A kind of true zero level integrated type optical waveguide half-wave plate |
| CN109633814B (en) * | 2019-01-15 | 2020-11-03 | 浙江大学 | True zero-order integrated optical waveguide type half-wave plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090320 Address after: Wuyi Road Qishuyan Development Zone Jiangsu Lucheng city of Changzhou Province, No. 699, zip code: 213000 Co-patentee after: Nanrui Relay Protection Electricity Co., Ltd., Nanjing Patentee after: Changzhou br electric power automation equipment Co., Ltd. Address before: No 29, Tai Sheng Road, Jiangning District, Jiangsu, Nanjing: 211100 Patentee before: Nanrui Relay Protection Electricity Co., Ltd., Nanjing |
|
| ASS | Succession or assignment of patent right |
Owner name: CHANGZHOU BORUI POWER AUTOMATION EQUIPMENT CO., LT Free format text: FORMER OWNER: NANRUI JIBAO ELECTRIC CO., LTD. Effective date: 20090320 |
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150602 Granted publication date: 20060628 |