CN204333587U - A kind of light channel structure for Er-doped fiber spontaneous radiation light source - Google Patents
A kind of light channel structure for Er-doped fiber spontaneous radiation light source Download PDFInfo
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- CN204333587U CN204333587U CN201520042900.2U CN201520042900U CN204333587U CN 204333587 U CN204333587 U CN 204333587U CN 201520042900 U CN201520042900 U CN 201520042900U CN 204333587 U CN204333587 U CN 204333587U
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Abstract
The utility model discloses a kind of light channel structure for Er-doped fiber spontaneous radiation light source, comprise pump laser source (1), optical fibre wavelength division multiplexer (2), Er-doped fiber (3), fiber coupler (4) and non-reflective box-shaped spectra filter (5); Fiber coupler (4) is provided with the first link, the second link and the 3rd link; Pump laser source (1) is connected with optical fibre wavelength division multiplexer (2) and Er-doped fiber (3) successively by optical fiber; Er-doped fiber (3) is connected by first link of optical fiber with fiber coupler (4); Second link of fiber coupler (4) and the 3rd link all connect and compose a fiber reflection ring with the smooth filter function of spectrum by optical fiber and non-reflective box-shaped spectra filter (5).Described light channel structure is connected in series into non-reflective box-shaped spectra filter in the middle of the fiber reflection ring, is that light signal near 1530nm carries out energy attenuation, to make box-shaped spectra, prevents laser generation phenomenon simultaneously to wavelength.
Description
Technical field
The utility model relates to optical fiber source technical field, particularly a kind of light channel structure for Er-doped fiber spontaneous radiation light source.
Background technology
Er-doped fiber spontaneous radiation light source is widely used in fiber grating sensing and monitoring system, optic fiber gyroscope navigation system and other optical monitoring system.The power output of Er-doped fiber spontaneous radiation light source and flatness are two important technology indexs of influential system performance.
Application number be 200320112294.4 Chinese patent disclose a kind of ultra wide band optical fiber source, it comprises optical fiber, semiconductor laser, optical isolator and Er-doped fiber, also comprises reflector, Wavelength division multiplexing optical coupler.Wherein, first semiconductor laser is by first wave division multiplex coupler forward pumping Er-doped fiber, and second semiconductor laser is by second wave division multiplex coupler backward pump erbium-doped optical fiber; The other end of first wavelength division multiplexer is connected with fibre reflector, and the amplified spontaneous emission luminous energy therefore propagated to the left side is reflected by fibre reflector, reenters Er-doped fiber, as the secondary pumping source of Er-doped fiber; The other end of second wavelength division multiplexer is connected with isolator, forms wideband light source output.
The characteristic of Er-doped fiber itself, the spectrum of spontaneous radiation light source is caused easily to produce laser generation phenomenon at 1530nm wavelength place, especially after increasing fibre reflector, the light that dextrad is propagated is stronger at the energy at 1530nm wavelength place, after reflector reflects spreads into Er-doped fiber left again, more easily there is laser generation problem.
How to make box-shaped spectra and prevent laser generation phenomenon to become those skilled in the art's problem urgently.
Utility model content
The purpose of this utility model is the above-mentioned defect for prior art, provides a kind of light channel structure for Er-doped fiber spontaneous radiation light source.
The light channel structure for Er-doped fiber spontaneous radiation light source that the utility model provides comprises pump laser source, optical fibre wavelength division multiplexer, Er-doped fiber, fiber coupler and non-reflective box-shaped spectra filter;
Fiber coupler is provided with the first link, the second link and the 3rd link;
Pump laser source is connected with optical fibre wavelength division multiplexer and Er-doped fiber successively by optical fiber; Er-doped fiber is connected with the first link of fiber coupler by optical fiber; Second link of fiber coupler and the 3rd link all connect and compose a fiber reflection ring with the smooth filter function of spectrum by optical fiber and non-reflective box-shaped spectra filter, and this fiber reflection ring can turn back to by Er-doped fiber in Er-doped fiber after the light signal that fiber coupler is propagated carries out the smooth filtering process of spectrum.
Preferably, the coupling ratio of described fiber coupler is 50:50.
The utility model has following beneficial effect:
Compared with the light channel structure of prior art, described light channel structure of the present utility model is connected in series into non-reflective box-shaped spectra filter in the middle of fiber reflection ring, be that light signal near 1530nm carries out energy attenuation to wavelength, to make box-shaped spectra, prevent laser generation phenomenon simultaneously.Therefore, for the Er-doped fiber that length is identical, the power output of described light channel structure significantly improves.In other words, when power output is identical, described light channel structure can save the consumption of Er-doped fiber.
Accompanying drawing explanation
The schematic diagram of the light channel structure for Er-doped fiber spontaneous radiation light source that Fig. 1 provides for the utility model embodiment;
The correlation curve figure of the power output for the light channel structure of Er-doped fiber spontaneous radiation light source and the light channel structure of prior art that Fig. 2 provides for the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, utility model content of the present utility model is further described.
As shown in Figure 1, the light channel structure for Er-doped fiber spontaneous radiation light source that the present embodiment provides comprises pump laser source 1, optical fibre wavelength division multiplexer 2, Er-doped fiber 3, fiber coupler 4 and non-reflective box-shaped spectra filter 5.Fiber coupler 4 is provided with three links, i.e. the first link, the second link and the 3rd link.Pump laser source 1 is connected with optical fibre wavelength division multiplexer 2 and Er-doped fiber 3 successively by optical fiber.Er-doped fiber 3 is connected with the first link of fiber coupler 4 by optical fiber.Second link of fiber coupler 4 and the 3rd link all connect and compose a fiber reflection ring with the smooth filter function of spectrum by optical fiber and non-reflective box-shaped spectra filter 5, and this fiber reflection ring can turn back to by Er-doped fiber 3 in Er-doped fiber 3 after the light signal that fiber coupler 4 is propagated carries out the smooth filtering process of spectrum.
Pump laser source 1 is for sending pump light signals to optical fibre wavelength division multiplexer 2.Optical fibre wavelength division multiplexer 2 is for distributing the light signal of different wave length.Er-doped fiber 3 for giving off the light signal that wave-length coverage is 1525nm-1565nm under the excitation of pump laser source 1.Non-reflective box-shaped spectra filter 5 for carrying out energy attenuation to the light signal near wavelength 1530nm, to make box-shaped spectra.The output of optical fibre wavelength division multiplexer 2 is used as the outside output optical signal of output of Er-doped fiber spontaneous radiation light source, uses for user.Preferably, the coupling ratio of fiber coupler 4 is 50:50.
The using method of the described light channel structure for Er-doped fiber spontaneous radiation light source of the present embodiment is as follows:
Pump laser source 1 sends pump light signals to optical fibre wavelength division multiplexer 2;
The pump light signals of optical fibre wavelength division multiplexer 2 self-pomped lasing light emitter in future 1 carries out selectivity distribution, and the pump light signals chosen is propagated to Er-doped fiber 3;
Er-doped fiber 3 gives off the light signal that wave-length coverage is 1525nm-1565nm under the excitation of pump light signals, and propagates after this optical signal amplification to fiber coupler 4, and the first link through fiber coupler 4 enters fiber coupler 4;
The fiber reflection ring that fiber coupler 4 and non-reflective box-shaped spectra filter 5 are formed will turn back in Er-doped fiber 3 by Er-doped fiber 3 after the light signal that fiber coupler 4 is propagated carries out the smooth filtering process of spectrum; Particularly, exported and the light signal propagated to non-reflective box-shaped spectra filter 5 by the second link of fiber coupler 4, carry out returning after the smooth filtering process of spectrum through non-reflective box-shaped spectra filter 5, the 3rd link through fiber coupler 4 enters fiber coupler 4, then exports from the first link of fiber coupler 4 and propagates to Er-doped fiber 3; Otherwise, exported and the light signal propagated to non-reflective box-shaped spectra filter 5 by the 3rd link of fiber coupler 4, carry out returning after the smooth filtering process of spectrum through non-reflective box-shaped spectra filter 5, the second link through fiber coupler 4 enters fiber coupler 4, then exports from the first link of fiber coupler 4 and propagates to Er-doped fiber 3;
The light signal returned is amplified backward optical fibre wavelength division multiplexer 2 and propagates by Er-doped fiber 3 again;
Light signal after Er-doped fiber 3 amplifies by optical fibre wavelength division multiplexer 2 again exports, and uses for user.
As shown in Figure 2, the curve L1 in figure represents the raw output power curve when not adopting any planarization light channel structure; Curve L2 in figure represents the output power curve when adopting the planarization light channel structure of prior art; Curve L3 in figure represents the output power curve when adopting the planarization light channel structure of the present embodiment.As seen from Figure 2, compare with curve L1 with L2, the fluctuation of curve L3 is minimum, and namely degree of planarization is the highest; Curve L3 is compared to curve L2, and power output improves, and this shows compared with the light channel structure of prior art, and the power output of the described light channel structure of the present embodiment significantly improves.
Compared with the light channel structure of prior art, the described light channel structure of the present embodiment is connected in series into non-reflective box-shaped spectra filter in the middle of fiber reflection ring, be that light signal near 1530nm carries out energy attenuation to wavelength, to make box-shaped spectra, prevent laser generation phenomenon simultaneously.Therefore, for the Er-doped fiber that length is identical, the power output of the described light channel structure of the present embodiment significantly improves.In other words, when power output is identical, the described light channel structure of the present embodiment can save the consumption of Er-doped fiber.
Should be appreciated that above is illustrative and not restrictive by preferred embodiment to the detailed description that the technical solution of the utility model is carried out.Those of ordinary skill in the art can modify to the technical scheme described in each embodiment on the basis of reading the utility model specification, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (2)
1. the light channel structure for Er-doped fiber spontaneous radiation light source, it is characterized in that, this light channel structure comprises pump laser source (1), optical fibre wavelength division multiplexer (2), Er-doped fiber (3), fiber coupler (4) and non-reflective box-shaped spectra filter (5); Fiber coupler (4) is provided with the first link, the second link and the 3rd link;
Pump laser source (1) is connected with optical fibre wavelength division multiplexer (2) and Er-doped fiber (3) successively by optical fiber; Er-doped fiber (3) is connected by first link of optical fiber with fiber coupler (4); Second link of fiber coupler (4) and the 3rd link all connect and compose a fiber reflection ring with the smooth filter function of spectrum by optical fiber and non-reflective box-shaped spectra filter (5), and this fiber reflection ring can turn back to by Er-doped fiber (3) in Er-doped fiber (3) after the light signal that fiber coupler (4) is propagated carries out the smooth filtering process of spectrum.
2. the light channel structure for Er-doped fiber spontaneous radiation light source according to claim 1, is characterized in that, the coupling ratio of described fiber coupler (4) is 50:50.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520042900.2U CN204333587U (en) | 2015-01-21 | 2015-01-21 | A kind of light channel structure for Er-doped fiber spontaneous radiation light source |
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| CN201520042900.2U CN204333587U (en) | 2015-01-21 | 2015-01-21 | A kind of light channel structure for Er-doped fiber spontaneous radiation light source |
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| CN201520042900.2U Expired - Fee Related CN204333587U (en) | 2015-01-21 | 2015-01-21 | A kind of light channel structure for Er-doped fiber spontaneous radiation light source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418087A (en) * | 2018-04-25 | 2018-08-17 | 深圳技术大学（筹） | A kind of C+L wave bands superfluorescent fiber sources |
| CN111711061A (en) * | 2020-06-29 | 2020-09-25 | 华南理工大学 | Dual-wavelength all-fiber laser |
-
2015
- 2015-01-21 CN CN201520042900.2U patent/CN204333587U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108418087A (en) * | 2018-04-25 | 2018-08-17 | 深圳技术大学（筹） | A kind of C+L wave bands superfluorescent fiber sources |
| CN111711061A (en) * | 2020-06-29 | 2020-09-25 | 华南理工大学 | Dual-wavelength all-fiber laser |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 Termination date: 20200121 |