CN202260108U - Adjustable ring-cavity erbium-doped optical fiber multi-wavelength laser - Google Patents
Adjustable ring-cavity erbium-doped optical fiber multi-wavelength laser Download PDFInfo
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- CN202260108U CN202260108U CN2011203581766U CN201120358176U CN202260108U CN 202260108 U CN202260108 U CN 202260108U CN 2011203581766 U CN2011203581766 U CN 2011203581766U CN 201120358176 U CN201120358176 U CN 201120358176U CN 202260108 U CN202260108 U CN 202260108U
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Abstract
The utility model relates to an adjustable ring-cavity erbium-doped optical fiber multi-wavelength laser based on the cascade HiBi optical fiber and the Sagnac ring. The laser comprises two optical circulators and two Sagnac loop filters, wherein either Sagnac loop filter comprises 3dB optical couplers, a high-birefringence optical fiber and a polarization controller; the high-birefringence optical fiber is connected with the polarization controller in series, and the other end of the high-birefringence optical fiber and the other end of the polarization controller are respectively connected with a same-direction port of each 3dB optical coupler; a pump source is connected with an erbium-doped optical fiber through a wavelength division multiplexer, and the other end of the erbium-doped optical fiber is connected with the first optical circulator; the first optical circulator is connected with the first 3dB optical coupler and is also connected with the second optical circulator, and the second optical circulator is connected with the second 3dB optical coupler and is also connected with the input end of an optical coupler; a large-splitting-ratio port of the optical coupler is connected with a port of the wavelength division multiplexer; a small-splitting-ratio port of the optical coupler is used as a laser output port; and all the parts are connected by the optical fibers. The laser has the advantages of simple structure, low cost, easy integration of optical-fiber systems and wide adjustment range.
Description
Technical field
The utility model belongs to the optical information technical field, is specifically related to a kind of regulable ring-shaped chamber Er-doped fiber multiple-wavelength laser based on Cascade H iBi optical fiber Sagnac ring.
Background technology
Wavelength division multiplexing (WDM) technology is one of technology of core the most in the present optical communication network, and this technology can improve transmission capacity significantly on same optical fiber.In order to make up wavelength-division multiplex system, the most traditional light source package adopts a plurality of single wavelength lasers exactly, satisfies the requirement of channel quantity through the quantity that increases single wavelength laser, and obviously, this has just improved the manufacturing cost of whole system and the complexity of structure.
Along with the continuous development of wavelength-division multiplex technique, stable performance, have multi-wavelength output, low-cost, optical fiber is compatible, tunable range widely multiple-wavelength laser become researcher's the focus of attention gradually.Such laser all has in optical communication system, industrial processes, sensory field, monitoring field etc. comparatively widely to be used.
The technical scheme of traditional multiple-wavelength laser generally can both stably be exported a plurality of wavelength; But; The defective of its existence is: the structure more complicated; And quantity, wavelength output gap, laser output linewidth, wavelength output area for wavelength can't be controlled easily, thereby have greatly limited the application of multiple-wavelength laser, have hindered the development of multiple-wavelength laser technology.As, Chinese patent ZL200620106571.4 discloses a kind of linear structure multi-wavelength optical fiber laser, and it adopts single Sagnac ring to realize multi-wavelength output as comb filter, and there is the tunable range smaller defect in it.
Summary of the invention
There is expensive, complex structure, deficiency such as can not controls easily to existing multiple-wavelength laser, the utility model provides a kind of regulable ring-shaped chamber Er-doped fiber multiple-wavelength laser based on Cascade H iBi optical fiber Sagnac ring for quantity, wavelength output gap, laser output linewidth, the output wavelength scope of wavelength output.
The utility model is taked following technical scheme: regulable ring-shaped chamber Er-doped fiber multiple-wavelength laser comprises pumping source, wavelength division multiplexer, Er-doped fiber, first optical circulator, second optical circulator, a Sagnac loop filter, the 2nd Sagnac loop filter, optical coupler; A described Sagnac loop filter comprises a 3dB optical coupler, first hi bi birefringence fiber and first Polarization Controller; First hi bi birefringence fiber and first Polarization Controller be through optical fiber series connection, the other end of first hi bi birefringence fiber, first Polarization Controller respectively with a 3dB optical coupler in the same way port be connected through optical fiber; Described the 2nd Sagnac loop filter comprises the 2nd 3dB optical coupler, second hi bi birefringence fiber and second Polarization Controller; Second hi bi birefringence fiber and second Polarization Controller be through optical fiber series connection, the other end of second hi bi birefringence fiber, second Polarization Controller respectively with the 2nd 3dB optical coupler in the same way port be connected through optical fiber; Pumping source is connected through optical fiber with the input port of wavelength division multiplexer; The output port of wavelength division multiplexer is connected through optical fiber with an end of Er-doped fiber; The another port of Er-doped fiber is connected through optical fiber with first port of first optical circulator; Second port of first optical circulator is connected through optical fiber with a port of a 3dB optical coupler of a Sagnac loop filter; The 3rd port of first optical circulator is connected through optical fiber with first port of second optical circulator, and second port of second optical circulator is connected through optical fiber with a port of the 2nd 3dB optical coupler of the 2nd Sagnac loop filter, and the 3rd port of second optical circulator is connected through optical fiber with the input of optical coupler; The big splitting ratio port of optical coupler is connected through optical fiber with the port of wavelength division multiplexer, forms loop; The port of the little splitting ratio of optical coupler is as the laser output mouth.
Preferably, the gain ranging of Er-doped fiber is 1530nm to 1570nm.
Preferably, the length of first hi bi birefringence fiber is chosen as 1 meter and 5 meters, and birefringence is 0.0003.
Preferably, the length of second hi bi birefringence fiber is chosen as 1 meter and 2 meters, and birefringence is 0.0003.
Preferably, the working range of optical coupler is 1530nm to 1580nm.
Regulate first Polarization Controller or second Polarization Controller; Control two in first and second Sagnac loop filter and restraint the phase parameter of the light of propagating in opposite direction; Just can regulate the filtering characteristic of two Sagnac loop filters, thereby finally regulate the wavelength interval and the wavelength output wave band of multiwavelength laser output.
Change the length of the hi bi birefringence fiber in two Sagnac loop filters; Can change the wavelength interval and the laser linewidth of multiwavelength laser output respectively; The rule of obeying is that the laser output gap is determined by shorter hi bi birefringence fiber length; Shorter hi bi birefringence fiber length is long more, and the laser output gap is more little; The laser output linewidth is by the optical fiber with double refractive index length decision of growing tall, and the optical fiber with double refractive index length of growing tall is long more, and the laser output linewidth is narrow more.
Adopt two optical circulators in the utility model technical scheme, can isolate of the influence of the reverberation of Sagnac loop filter preferably Er-doped fiber.
The utility model utilizes the cascade of Sagnac loop filter to realize the output of tunable multi-wavelength laser as comb filter.
The process that the utility model is exported based on the Er-doped fiber multiwavelength laser of height refraction optical fiber Sagnac ring cascade:
1,, selects the Er-doped fiber of corresponding gain ranging for use, and confirm Er-doped fiber length according to loop loss according to the output wavelength scope of the required multi-wavelength optical fiber laser that obtains.
2, select the optical circulator and the optical coupler of the output wavelength scope of the multi-wavelength optical fiber laser that the operating wavelength range covering need obtain.
3, at interval, the Sagnac interference ring of selecting for use the shorter hi bi birefringence fiber of appropriate length to form according to the output wavelength of the required multi-wavelength optical fiber laser that obtains.
4, according to the output laser linewidth of the required multi-wavelength optical fiber laser that obtains, the Sagnac interference ring of selecting for use the optical fiber with double refractive index that grows tall to form, output laser linewidth is by the optical fiber with double refractive index length decision of growing tall.
5, open pumping source, regulate the pumping source power output, regulate the Polarization Controller in two Sagnac loop filters, multiple-wavelength laser realizes stablizing multi-wavelength output.
The utility model adopts the cascade of high birefringence rate Sagnac ring to realize multi-wavelength output as comb filter; Compare single Sagnac ring and realize the laser of multi-wavelength output as comb filter; Its tunable range is wider; Comprise and to carry out tuningly to multi-wavelength output gap, output wavelength scope, laser output linewidth etc. that the laser output gap is determined that by shorter hi bi birefringence fiber length the long more laser output gap of shorter hi bi birefringence fiber length is more little; The laser output linewidth is by the optical fiber with double refractive index length decision of growing tall, and the optical fiber with double refractive index length of growing tall is long more, and the laser output linewidth is narrow more.This makes based on the potentiality of multiple-wavelength laser in wavelength-division multiplex system of high birefringence rate Sagnac ring cascade bigger, applicatory wider general.
The utility model laser simple in structure, cost is low, be easy to that fibre system is integrated, tunable range is extensive; Can both control the good stability of laser output easily to the wavelength number of multiwavelength laser output, output wavelength scope, wavelength interval, live width etc.It is specially adapted to technical fields such as optical communication, light sensing, light detection.
Description of drawings
Fig. 1 is the structural representation of the utility model laser.
Fig. 2 (a), 2 (b) are the stable multiwavelength laser output spectrum figure of the utility model embodiment.
Fig. 3 (a), 3 (b), 3 (c) realize the spectrogram of wavelength output area change for the utility model embodiment through regulating Polarization Controller.
Fig. 4 (a), 4 (b) realize the spectrogram that the wavelength output gap changes for the utility model embodiment through the shorter hi bi birefringence fiber length of change.
Fig. 5 (a), 5 (b) are that the utility model embodiment is through changing the spectrogram that the optical fiber with double refractive index length of growing tall realizes that the laser output linewidth changes.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is elaborated.
As shown in Figure 1, the regulable ring-shaped chamber Er-doped fiber multiple-wavelength laser that encircles based on Cascade H iBi optical fiber Sagnac comprises pumping source 1, wavelength division multiplexer 2, Er-doped fiber 3, the first optical circulator 4-1 and the second optical circulator 4-2, a Sagnac loop filter 9-1 and the 2nd Sagnac loop filter 9-2, optical coupler 8.
The gain ranging of Er-doped fiber 3 is 1530nm to 1570nm.The working range of optical coupler 8 is 1530nm to 1580nm, and the port d of optical coupler 8 little splitting ratios is as the laser output mouth.The one Sagnac loop filter 9-1 comprises a 3dB optical coupler 5-1, the first hi bi birefringence fiber 6-1 and the first Polarization Controller 7-1; The first hi bi birefringence fiber 6-1 and the first Polarization Controller 7-1 are through the optical fiber series connection; The other end of the first hi bi birefringence fiber 6-1, the first Polarization Controller 7-1 respectively with a 3dB optical coupler 5-1 in the same way (two) port be connected through optical fiber; The length of the first hi bi birefringence fiber 6-1 is chosen as 1 meter and 5 meters, and birefringence is 0.0003.The 2nd Sagnac loop filter 9-2 comprises the 2nd 3dB optical coupler 5-2, the second hi bi birefringence fiber 6-2 and the second Polarization Controller 7-2; The second hi bi birefringence fiber 6-2 and the second Polarization Controller 7-2 are through the optical fiber series connection; The other end of the second hi bi birefringence fiber 6-2, the second Polarization Controller 7-2 respectively with the 2nd 3dB optical coupler 5-2 in the same way (two) port be connected through optical fiber; The length of the second hi bi birefringence fiber 6-2 is chosen as 1 meter and 2 meters, and birefringence is 0.0003.
Open pumping source 1, regulate the power output of pumping source 1, the control laser output power.Select the Er-doped fiber 3 of appropriate length, under the effect of pumping source 1, its length satisfies the required gain of generation multiwavelength laser.In order to reduce loss as much as possible, the tie point of each device directly is welded together in the annular chamber, chooses 80: 20 optical coupler 8, makes it can make power output maximum again for laser cavity provides enough feedbacks.Obtain stablizing multiwavelength laser output shown in Fig. 2 (a), the output of multi-wavelength optical fiber laser is stable, and shown in Fig. 2 (b), the laser output jitter has been realized the stable output of fiber laser multi-wavelength less than 0.1dB in 10 minutes continuous sweep.
Regulate the first Polarization Controller 7-1 and the second Polarization Controller 7-2, control the filtering characteristic of a Sagnac loop filter 9-1 and the 2nd Sagnac loop filter 9-2, finally control multiwavelength laser output output wavelength scope.C-wave band short wavelength region multiwavelength laser output shown in Fig. 3 (a), Fig. 3 (b) is whole C-wave band multiwavelength laser output, the output of the multiwavelength laser of C-wave band long wavelength region shown in Fig. 3 (c).
Adopt the first hi bi birefringence fiber 6-1 and the second hi bi birefringence fiber 6-2 of appropriate length; The wavelength interval and the laser linewidth of the output of control multiwavelength laser; Its rule of observing is that the laser output gap is determined by shorter hi bi birefringence fiber length; Shorter hi bi birefringence fiber length is long more, and the laser output gap is more little; The laser output linewidth is by the optical fiber with double refractive index length decision of growing tall, and the optical fiber with double refractive index length of growing tall is long more, and the laser output linewidth is narrow more.The first hi bi birefringence fiber length is selected 5 meters for use shown in Fig. 4 (a), and the second hi bi birefringence fiber length is selected 1 meter multiwavelength laser output spectrum figure for use; The first hi bi birefringence fiber length is selected 5 meters for use shown in Fig. 4 (b), and the second hi bi birefringence fiber length is selected 2 meters multiwavelength laser output spectrum figure for use.The first hi bi birefringence fiber length is selected 1 meter for use shown in Fig. 5 (a), and the second hi bi birefringence fiber length is selected 1 meter multiwavelength laser output spectrum figure for use; The first hi bi birefringence fiber length is selected 5 meters for use shown in Fig. 5 (b), and the second hi bi birefringence fiber length is selected 1 meter multiwavelength laser output spectrum figure for use.
The utility model can obtain stable tunable multiwavelength laser output, its length through Polarization Controller, hi bi birefringence fiber to multiwavelength laser output carry out tuning.The power output of its multi-wavelength and number receive restrictions such as pumping light power, length of ring cavity.Along with the continuous development of various photoelectric devices, will obtain more stable, wideer adjustable wide-band, and its application will be more extensive also.
More than the preferred embodiment and the principle of the utility model specified; As far as those of ordinary skill in the art; According to the thought that the utility model provides, the part that on embodiment, can change, and these change the protection range that also should be regarded as the utility model.
Claims (5)
1. regulable ring-shaped chamber Er-doped fiber multiple-wavelength laser is characterized in that comprising pumping source, wavelength division multiplexer, Er-doped fiber, first optical circulator, second optical circulator, a Sagnac loop filter, the 2nd Sagnac loop filter, optical coupler; A described Sagnac loop filter comprises a 3dB optical coupler, first hi bi birefringence fiber and first Polarization Controller; First hi bi birefringence fiber and first Polarization Controller be through optical fiber series connection, the other end of first hi bi birefringence fiber, first Polarization Controller respectively with a 3dB optical coupler in the same way port be connected through optical fiber; Described the 2nd Sagnac loop filter comprises the 2nd 3dB optical coupler, second hi bi birefringence fiber and second Polarization Controller; Second hi bi birefringence fiber and second Polarization Controller be through optical fiber series connection, the other end of second hi bi birefringence fiber, second Polarization Controller respectively with the 2nd 3dB optical coupler in the same way port be connected through optical fiber; Pumping source is connected through optical fiber with the input port of wavelength division multiplexer; The output port of wavelength division multiplexer is connected through optical fiber with an end of Er-doped fiber; The another port of Er-doped fiber is connected through optical fiber with first port of first optical circulator; Second port of first optical circulator is connected through optical fiber with a port of a 3dB optical coupler of a Sagnac loop filter; The 3rd port of first optical circulator is connected through optical fiber with first port of second optical circulator, and second port of second optical circulator is connected through optical fiber with a port of the 2nd 3dB optical coupler of the 2nd Sagnac loop filter, and the 3rd port of second optical circulator is connected through optical fiber with the input of optical coupler; The big splitting ratio port of optical coupler is connected through optical fiber with the port of wavelength division multiplexer, forms loop; The port of the little splitting ratio of optical coupler is as the laser output mouth.
2. regulable ring-shaped chamber as claimed in claim 1 Er-doped fiber multiple-wavelength laser, it is characterized in that: the gain ranging of said Er-doped fiber is 1530nm to 1570nm.
3. regulable ring-shaped chamber as claimed in claim 1 Er-doped fiber multiple-wavelength laser is characterized in that: the length of said first hi bi birefringence fiber is chosen as 1 meter and 5 meters, and birefringence is 0.0003.
4. regulable ring-shaped chamber as claimed in claim 1 Er-doped fiber multiple-wavelength laser is characterized in that: the length of said second hi bi birefringence fiber is chosen as 1 meter and 2 meters, and birefringence is 0.0003.
5. regulable ring-shaped chamber as claimed in claim 1 Er-doped fiber multiple-wavelength laser, it is characterized in that: the working range of said optical coupler is 1530nm to 1580nm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203581766U CN202260108U (en) | 2011-09-22 | 2011-09-22 | Adjustable ring-cavity erbium-doped optical fiber multi-wavelength laser |
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| CN2011203581766U CN202260108U (en) | 2011-09-22 | 2011-09-22 | Adjustable ring-cavity erbium-doped optical fiber multi-wavelength laser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412499A (en) * | 2011-09-22 | 2012-04-11 | 杭州电子科技大学 | Adjustable ring-shaped cavity erbium-doped optical-fiber multi-wavelength laser based on cascade HiBi optical fibers and Sagnac rings |
| CN110783804A (en) * | 2019-07-19 | 2020-02-11 | 杭州电子科技大学 | Tunable multi-wavelength fiber laser based on polarization hole burning effect and Sagnac ring |
| CN116914543A (en) * | 2023-09-12 | 2023-10-20 | 武汉中科锐择光电科技有限公司 | Generating a Broadband Continuously Tunable Laser System |
-
2011
- 2011-09-22 CN CN2011203581766U patent/CN202260108U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102412499A (en) * | 2011-09-22 | 2012-04-11 | 杭州电子科技大学 | Adjustable ring-shaped cavity erbium-doped optical-fiber multi-wavelength laser based on cascade HiBi optical fibers and Sagnac rings |
| CN110783804A (en) * | 2019-07-19 | 2020-02-11 | 杭州电子科技大学 | Tunable multi-wavelength fiber laser based on polarization hole burning effect and Sagnac ring |
| CN110783804B (en) * | 2019-07-19 | 2021-02-26 | 杭州电子科技大学 | Tunable multi-wavelength fiber laser based on polarization hole burning effect and Sagnac ring |
| CN116914543A (en) * | 2023-09-12 | 2023-10-20 | 武汉中科锐择光电科技有限公司 | Generating a Broadband Continuously Tunable Laser System |
| CN116914543B (en) * | 2023-09-12 | 2023-11-28 | 武汉中科锐择光电科技有限公司 | Generating a Broadband Continuously Tunable Laser System |
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| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20140922 |
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| EXPY | Termination of patent right or utility model |