CN201750040U - Chirp grating based multi-wavelength fiber laser - Google Patents
Chirp grating based multi-wavelength fiber laser Download PDFInfo
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- CN201750040U CN201750040U CN 201020246170 CN201020246170U CN201750040U CN 201750040 U CN201750040 U CN 201750040U CN 201020246170 CN201020246170 CN 201020246170 CN 201020246170 U CN201020246170 U CN 201020246170U CN 201750040 U CN201750040 U CN 201750040U
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- optical fiber
- chirp grating
- wavelength
- modulator
- division multiplexer
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Abstract
The utility model discloses a chirp grating based multi-wavelength fiber laser which comprises a pumping source and a ring resonator, wherein the ring resonator at least includes a wavelength division multiplexer, an optoisolator, a coupler, a polarization controller, a modulator, a gain fiber, and a chirp grating for increasing chromatic dispersion in the ring resonator; the wavelength division multiplexer is connected with an input end of the optoisolator through an optical fiber; an output end of the optoisolator is connected with the coupler through the optical fiber; the coupler is connected with the polarization controller through the optical fiber; the polarization controller is connected with the modulator through the optical fiber; the modulator is connected with the chirp grating through the optical fiber; and the chirp grating are connected with the wavelength division multiplexer through the gain fiber. Therefore, compared with conventional multi-wavelength lasers, the chirp grating based multi-wavelength fiber laser has lowered cost and reduced volume and weight and improves the reliability.
Description
Technical field
The utility model relates to laser technology field, relates in particular to a kind of multi-wavelength optical fiber laser based on chirp grating.
Background technology
Fiber laser is with its superior performance and the price that overflows, in fields such as optical communication, sensing, printing, mark, materials processing, medical treatment wide application is arranged, conventional laser be may substitute to a great extent, and some new laser applications, the scale of expansion of laser light industry opened up.Wherein, multi-wavelength optical fiber laser is very promising a kind of new type light source in the fields such as wavelength division multiplexing communications systems, sensing.The technology that realizes multi-wavelength optical fiber laser has a lot, active mode locking fiber laser as shown in Figure 1, ring resonator is made up of wavelength division multiplexer (WDM) 1, Er-doped fiber (EDF) 2, dispersion compensating fiber (DCF) 3, modulator (modulator) 4, Polarization Controller (PC) 5, coupler (coupler) 6, optical isolator (OI) 7 etc.Pumping (pump) light is coupled in the Er-doped fiber 2 effectively by wavelength division multiplexer 1, and 7 of optical isolators have guaranteed the one-way transmission of laser in resonant cavity so that pump conversion efficiency is preferably arranged, and avoids the influence of the end face reflection etc. of output to resonant cavity.This technology utilizes dispersion compensating fiber 3 to increase the chamber internal dispersion, under same modulating frequency, can realize the harmonic mode locking of different number of times, thereby realizes multiwavelength laser output.But the DCF price that the fiber laser in the present technique adopts is higher, and the longer dimension of required DCF, and inconvenience is arranged during application more.
In summary, multi-wavelength optical fiber laser of the prior art on reality is used, obviously exists inconvenience and defective, so be necessary to be improved.
The utility model content
At above-mentioned defective, the purpose of this utility model is to provide a kind of multi-wavelength optical fiber laser based on chirp grating, and it is compared existing multi-wavelength optical fiber laser and has the advantage that volume is little, in light weight, cost is low.
To achieve these goals, the utility model provides a kind of multi-wavelength optical fiber laser based on chirp grating, comprise pumping source and ring resonator, described ring resonator comprises wavelength division multiplexer at least, optical isolator, coupler, Polarization Controller, modulator, gain fibre and the chirp grating that is used to increase described ring resonator internal dispersion, described wavelength division multiplexer is connected to the input of described optical isolator by optical fiber, the output of described optical isolator is connected to described coupler through optical fiber, described coupler is connected to described Polarization Controller through optical fiber, described Polarization Controller is connected with described modulator through optical fiber, described modulator is connected with described chirp grating through optical fiber, and described chirp grating is connected by described gain fibre with wavelength division multiplexer.
According to the multi-wavelength optical fiber laser based on chirp grating of the present utility model, described gain fibre is an Er-doped fiber.
According to the multi-wavelength optical fiber laser based on chirp grating of the present utility model, described gain fibre is the Er-Yb co-doped fiber.
The utility model is by the device of the ring resonator of replacement multi-wavelength optical fiber laser, chirp grating is connected by gain fibre with wavelength division multiplexer, and chirp grating is connected with optical fiber with modulator, the dispersion compensating fiber that replaces prior art whereby, use chirp grating can reduce the multi-wavelength optical fiber laser volume and weight largely, improve reliability, and can reduce cost.
Description of drawings
Fig. 1 is the structure chart of ring resonator of the multi-wavelength optical fiber laser of prior art;
Fig. 2 is the structure chart of the utility model based on the multi-wavelength optical fiber laser of chirp grating.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer,, the utility model is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Fig. 2 shows basic structure of the present utility model, comprises pumping source 10 and ring resonator 20 based on the multi-wavelength optical fiber laser 100 of chirp grating.Wherein, ring resonator 20 comprises wavelength division multiplexer 21, optical isolator 22, coupler 23, Polarization Controller 24, modulator 25, gain fibre 26 and chirp grating 27 at least, wavelength division multiplexer 21 is connected to the input of optical isolator 22 by optical fiber, the output of this optical isolator 22 is connected to coupler 23 through optical fiber, this coupler 23 is connected to Polarization Controller 24 through optical fiber, and Polarization Controller 24 is connected with modulator 25 through optical fiber, this modulator 25 is connected with chirp grating 27 through optical fiber, and chirp grating 27 is connected by gain fibre 26 with wavelength division multiplexer 21.
In conjunction with Fig. 1, the utility model adopts chirp grating 27 to replace dispersion compensating fiber 3 of the prior art, increases the chamber internal dispersion with this, under same modulating frequency, can realize the harmonic mode locking of different number of times, realizes multiwavelength laser output whereby.
In the practical work process, pumping source 10 sends pumping laser (as: pump light of pumping wavelength 980nm) and transfers to wavelength division multiplexer 21, to gain fibre 26, this gain fibre 26 can be Er-doped fiber or Er-Yb co-doped fiber to pump light through wavelength division multiplexer 21 couplings after by Optical Fiber Transmission.For improving the absorption efficiency of pump light, reduce its loss in optical fiber, can according to pumping light intensity and gain fibre 26 parameters such as absorption coefficient, adopt this kind gain fibre 26 of appropriate length, pump light can be absorbed fully.
Specify the course of work of the present utility model below in conjunction with diagram.
It is the 980nm pump light that pumping source 10 sends wavelength, and behind wavelength division multiplexer 21, pump light is coupled to gain fibre 26.After gain fibre 26 absorbs, convert the laser that wavelength is about 1550nm to.Laser after conversion transmits along clockwise direction, vibrates in ring resonator 20.During laser process chirp grating 27,,, realize multiwavelength laser pulse output whereby so under same frequency modulation(FM), can realize the harmonic mode locking of different number of times because the chromatic dispersion of 27 pairs of different wave lengths of chirp grating is different, and can be from coupler 23 outputs.
In sum, the utility model is by the device of the ring resonator of replacement multi-wavelength optical fiber laser, chirp grating is connected by gain fibre with wavelength division multiplexer, and chirp grating is connected by optical fiber with modulator, replace dispersion compensating fiber of the prior art whereby, use chirp grating can reduce the multi-wavelength optical fiber laser volume and weight largely, improve reliability, and can reduce cost.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (3)
1. multi-wavelength optical fiber laser based on chirp grating, comprise pumping source and ring resonator, it is characterized in that, described ring resonator comprises wavelength division multiplexer at least, optical isolator, coupler, Polarization Controller, modulator, gain fibre and the chirp grating that is used to increase described ring resonator internal dispersion, described wavelength division multiplexer is connected to the input of described optical isolator by optical fiber, the output of described optical isolator is connected to described coupler through optical fiber, described coupler is connected to described Polarization Controller through optical fiber, described Polarization Controller is connected with described modulator through optical fiber, described modulator is connected with described chirp grating through optical fiber, and described chirp grating is connected by described gain fibre with wavelength division multiplexer.
2. the multi-wavelength optical fiber laser based on chirp grating according to claim 1 is characterized in that, described gain fibre is an Er-doped fiber.
3. the multi-wavelength optical fiber laser based on chirp grating according to claim 1 is characterized in that, described gain fibre is the Er-Yb co-doped fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020246170 CN201750040U (en) | 2010-07-01 | 2010-07-01 | Chirp grating based multi-wavelength fiber laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020246170 CN201750040U (en) | 2010-07-01 | 2010-07-01 | Chirp grating based multi-wavelength fiber laser |
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| CN201750040U true CN201750040U (en) | 2011-02-16 |
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| CN 201020246170 Expired - Fee Related CN201750040U (en) | 2010-07-01 | 2010-07-01 | Chirp grating based multi-wavelength fiber laser |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361213A (en) * | 2011-11-04 | 2012-02-22 | 北京交通大学 | Passive phase-locked fiber laser |
| CN112134133A (en) * | 2019-06-25 | 2020-12-25 | 朗美通经营有限责任公司 | Femtosecond pulse wide-spread optical fiber oscillator |
-
2010
- 2010-07-01 CN CN 201020246170 patent/CN201750040U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102361213A (en) * | 2011-11-04 | 2012-02-22 | 北京交通大学 | Passive phase-locked fiber laser |
| CN112134133A (en) * | 2019-06-25 | 2020-12-25 | 朗美通经营有限责任公司 | Femtosecond pulse wide-spread optical fiber oscillator |
| US11817672B2 (en) | 2019-06-25 | 2023-11-14 | Lumentum Operations Llc | Femtosecond pulse stretching fiber oscillator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110216 Termination date: 20120701 |