CN2938488Y - Filling type wave length switchover fibre-optical laser - Google Patents
Filling type wave length switchover fibre-optical laser Download PDFInfo
- Publication number
- CN2938488Y CN2938488Y CN 200620106573 CN200620106573U CN2938488Y CN 2938488 Y CN2938488 Y CN 2938488Y CN 200620106573 CN200620106573 CN 200620106573 CN 200620106573 U CN200620106573 U CN 200620106573U CN 2938488 Y CN2938488 Y CN 2938488Y
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- 239000000835 fiber Substances 0.000 claims abstract description 59
- 230000003287 optical effect Effects 0.000 claims abstract description 31
- 239000004065 semiconductor Substances 0.000 claims abstract description 12
- 239000013307 optical fiber Substances 0.000 claims description 12
- 238000002347 injection Methods 0.000 abstract description 3
- 239000007924 injection Substances 0.000 abstract description 3
- 229910052691 Erbium Inorganic materials 0.000 abstract 1
- UYAHIZSMUZPPFV-UHFFFAOYSA-N erbium Chemical compound [Er] UYAHIZSMUZPPFV-UHFFFAOYSA-N 0.000 abstract 1
- 238000004891 communication Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model relates to a fibre laser in which the fibre laser wavelength switching can be implemented based on the external optical injection. The fibre ring mirror of the utility model is connected to an erbium doped fibre amplifier linked to a fibre grating. The fibre grating is connected to the second port of an optical circulator. The first port of the optical circulator is connected to a turntable semiconductor laser, and the third port of the optical circulator is taken as the output port of the laser. In the optical circulator, if the optical signal enters from the first port, the optical signal will output from the second port. If the optical signal enters from the second port, the optical signal will output from the third port. The laser injection is adopted in the utility model for the implementation of wavelength switching. With convenient control, the switching wavelength can be flexibly selected.
Description
Technical field
The utility model belongs to the fiber laser field, particularly a kind ofly go into to realize the fiber laser that the fiber laser wavelength switches based on light beam outside the chamber.
Background technology
Along with the development of optical communication technique and optical fiber sensing technology, fiber laser becomes the focus that people pay close attention to day by day.Fiber laser has advantages such as compact conformation, high efficiency, low threshold value, narrow linewidth, tunable, optical fiber compatibility, in fields such as optical communication system, sensor-based system, industrial processes, monitorings important use is arranged.Recently the fiber laser medium wavelength switches owing to it has caused people's very big concern in the huge using value in aspects such as optical communication system, Fibre Optical Sensor.
Increasingly sophisticated along with the optical communication system structure, the switchable light source of wavelength is owing to its important function at aspects such as wavelength route, passage switchings obtains people's attention, and the wavelength of fiber laser switches by the experiment report.At present the technology of comparative maturity is to adopt the design of overlapping resonant cavity, by the device in the Artificial Control resonant cavity (as optical attenuator, Polarization Controller etc.) thus introduce the output wavelength of the loss control laser of different wave length laserresonator.Wavelength switching optical fiber laser output wavelength based on this technology has laser structure to determine, is difficult for change, needs the artificial mechanism operation to realize that wavelength switches, and speed is very slow.
Summary of the invention
The utility model is exactly at the deficiencies in the prior art, has proposed a kind of fiber laser of going into to realize the switching of fiber laser wavelength based on light beam outside the chamber.
The utility model comprises fiber annular speculum, erbium-doped fiber amplifier, fiber grating, optical circulator, the semiconductor laser with tunable by the optical fiber series connection.Enter as optical signals first port in the optical circulator, then export by second port; Enter as optical signals second port, then export by the 3rd port.
Described series connection is that the fiber annular speculum is connected erbium-doped fiber amplifier, erbium-doped fiber amplifier connects fiber grating, fiber grating connects second port of optical circulator, first port of optical circulator connects semiconductor laser with tunable, and the 3rd port of optical circulator is as the laser output mouth.
Fiber annular speculum and fiber grating constitute laser resonant cavity in the utility model, and erbium-doped fiber amplifier becomes the gain media of laser, and under the situation that laser injects outside not having the chamber, the output wavelength of laser is by the reflection wavelength decision of fiber grating.Above-mentioned whole system constitutes filling type wavelength switching optical fiber laser.Open erbium-doped fiber amplifier, obtain the laser output of single wavelength.Because erbium-doped fiber amplifier can be considered as the gain media of even broadening, when tunable semiconductor laser laser injects the fiber laser resonant cavity of being made up of fiber annular speculum and fiber grating, inject laser and original fiber laser laser generation competitive relation, laser is enough strong when injecting, will in competition, win, and the laser of original fiber laser starting of oscillation is pressed, and whole system is output as the wavelength laser of injection.Injecting laser is exaggerated through twice process of fiber annular speculum erbium-doped fiber amplifier.
Regulate the semiconductor laser with tunable wavelength in the utility model to needs wavelength switching position, set its power output, open semiconductor laser with tunable, the wavelength of laser output can transfer wavelength switching to, thereby does not need the artificial mechanism operation to realize the wavelength switching.The present invention mainly is applicable in optical communication, light sensing.The utility model has adopted laser inject to realize that wavelength switches, and control is convenient, and wavelength switching can be selected flexibly, the utility model optical fiber compatibility in addition, and compact conformation is easy to integrated.
Description of drawings
Fig. 1 is an overall structure schematic diagram of the present utility model;
Fig. 2 is that fiber laser wavelength of the present utility model switches design sketch.
Embodiment
As shown in Figure 1, the output of fiber annular speculum 1 is connected with an end light of erbium-doped fiber amplifier 2, one end light of the other end of erbium-doped fiber amplifier 2 and fiber grating 3 is connected, the other end of fiber grating 3 is connected with the second port light of optical fiber circulator 4, first port of optical fiber circulator 4 is connected with the output light of semiconductor laser with tunable 5, and the 3rd port of optical fiber circulator 4 is as the output port of fiber laser.
The gain bandwidth of selecting erbium-doped fiber amplifier 2 for use is 1525～1580 nanometers, and fiber grating 3 reflection wavelengths are 1550.25 nanometers, and the tuning range of semiconductor laser with tunable 5 is 1500～1590 nanometers.At first open erbium-doped fiber amplifier 2, the output wavelength of fiber laser is 1550.25 nanometers shown in Fig. 2 solid line.Then semiconductor laser with tunable 5 output wavelengths are transferred to 1555 nanometers, setting Output optical power is 3 milliwatts, opens semiconductor laser with tunable 5, and the output wavelength of fiber laser is 1555 nanometers shown in Fig. 2 dotted line.Thereby the wavelength of having realized fiber laser switches.
Claims (1)
1, a kind of filling type wavelength switching optical fiber laser is characterized in that this fiber laser comprises fiber annular speculum, erbium-doped fiber amplifier, fiber grating, optical circulator, the semiconductor laser with tunable by the optical fiber series connection; The fiber annular speculum connects erbium-doped fiber amplifier, erbium-doped fiber amplifier connects fiber grating, fiber grating connects second port of optical circulator, and first port of optical circulator connects semiconductor laser with tunable, and the 3rd port of optical circulator is as the laser output mouth; Enter as optical signals first port in the described optical circulator, then, enter, then export by the 3rd port as optical signals second port by the output of second port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620106573 CN2938488Y (en) | 2006-08-10 | 2006-08-10 | Filling type wave length switchover fibre-optical laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620106573 CN2938488Y (en) | 2006-08-10 | 2006-08-10 | Filling type wave length switchover fibre-optical laser |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2938488Y true CN2938488Y (en) | 2007-08-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620106573 Expired - Lifetime CN2938488Y (en) | 2006-08-10 | 2006-08-10 | Filling type wave length switchover fibre-optical laser |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2938488Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432820C (en) * | 2006-08-10 | 2008-11-12 | 浙江大学 | Filling type wavelength switching optical fiber laser |
| CN102361213A (en) * | 2011-11-04 | 2012-02-22 | 北京交通大学 | Passive phase-locked fiber laser |
-
2006
- 2006-08-10 CN CN 200620106573 patent/CN2938488Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100432820C (en) * | 2006-08-10 | 2008-11-12 | 浙江大学 | Filling type wavelength switching optical fiber laser |
| CN102361213A (en) * | 2011-11-04 | 2012-02-22 | 北京交通大学 | Passive phase-locked fiber laser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20060810 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |