CN201757826U - Light amplifier - Google Patents
Light amplifier Download PDFInfo
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- CN201757826U CN201757826U CN2010200564707U CN201020056470U CN201757826U CN 201757826 U CN201757826 U CN 201757826U CN 2010200564707 U CN2010200564707 U CN 2010200564707U CN 201020056470 U CN201020056470 U CN 201020056470U CN 201757826 U CN201757826 U CN 201757826U
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- coupler
- photo
- image intensifer
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Abstract
The utility model discloses a light amplifier, comprising a signal input terminal, a pump light source and an optical coupler, a gaining optical fiber, an optical coupler, an optical component unit, an optical coupler, a gaining optical fiber, an isolating device, and a signal output terminal successively connected; the output terminal of the pump light source is connected with the signal input terminal via the optical coupler, a branch circuit is in a parallel collection at the optical component unit, the optical coupler is placed in the branch circuit, and the optical coupler is utilized to isolate light propagated in a direction opposite to the propagation direction of the optical signal to inhibit MPI effect, as described above, since the By-pass branch circuit of the light amplifier is provided with a wavelength division multiplexer or an integrated light component, MPI effect is effectively inhibited, and stability of output signal is improved, the light amplifier is also characterized by convenient design, low cost, and high efficiency.
Description
Technical field
The utility model relates to a kind of image intensifer, particularly a kind of Erbium-Doped Fiber Amplifier (EDFA) that can suppress the MPI effect.
Background technology
Erbium-Doped Fiber Amplifier (EDFA) (EDFA) has that noise is low, gain is high, bandwidth is big, pumping efficiency is high and advantage such as stable work in work, is widely used in the various optical communication systems, and be the Primary Component of optical fiber telecommunications system.Be illustrated in figure 1 as the structural representation of prior art image intensifer, described image intensifer comprises signal input part 30, pump light source 31 and the photo-coupler 32, gain fibre 33, second photo-coupler 34, optical device unit 35, the 3rd photo-coupler 37, gain fibre 38, optoisolator 39, the signal output part 40 that connect successively; By among the figure as can be known, used the optical design of By-pass structure 36 in the described image intensifer, its advantage is that noise is low, gain is high, pumping (Pump) power is little, shortcoming is easily to produce multipath to interfere (MPI) effect, causes error rate of system to improve.
Summary of the invention
Given this, be necessary to provide a kind of Erbium-Doped Fiber Amplifier (EDFA) that can suppress the MPI effect.
To achieve these goals, the utility model provides a kind of image intensifer, comprises signal input part, pump light source and the photo-coupler, gain fibre, photo-coupler, optical device unit, photo-coupler, gain fibre, optoisolator, the signal output part that connect successively; The output terminal of described pump light source links to each other with signal input part by photo-coupler, the place is parallel with a branch road in described optical device unit, photo-coupler is placed described branch road, utilize photo-coupler to be isolated in the light of propagating on the reverse direction of the direction of propagation of described light signal and suppress the MPI effect.
Wherein, preferred version is: described photo-coupler adopts single wavelength division multiplex device, perhaps the integrator device.
Wherein, preferred version is: described gain fibre is an Er-doped fiber.
Wherein, preferred version is: described optical device unit comprises optoisolator (ISO), adjustable optical attenuator (VOA), dispersion compensation module (DCM), gain flattening filter (GFF).
Because the utility model adopts the optical device that wavelength division multiplexer or its integratorization are set on the By-pass of image intensifer branch road, effectively suppressed the MPI effect, not only improved the stability of output signal, and also had design convenient, the characteristics that cost is low, efficient is high.
Description of drawings
Fig. 1 is the structural representation of prior art image intensifer.
Fig. 2 is the structural representation of the utility model embodiment image intensifer.
The structural representation of Fig. 3 the utility model second embodiment image intensifer.
Embodiment
Below in conjunction with accompanying drawing the utility model image intensifer is described further.
As shown in Figure 2, be the structural representation of the utility model first embodiment image intensifer, described image intensifer comprises signal input part 10, pump light source 11 and first photo-coupler 12, gain fibre 13, second photo-coupler 14, optical device unit 15, the 3rd photo-coupler 17, gain fibre 18, optoisolator 19, the signal output part 20 that connect successively; The output terminal of described pump light source 11 links to each other with signal input part 10 by first photo-coupler 12, and first photo-coupler 12 is used for flashlight and pump light are lumped together; Described gain fibre 13 is an Er-doped fiber; Optoisolator 19 is used to suppress the light reflection, to guarantee the image intensifer working stability; Described optical device unit 15 comprises a kind of or wherein several combination in optoisolator (ISO), adjustable optical attenuator (VOA), dispersion compensation module (DCM), the gain flattening filter (GFF).
On described optical device unit 15, be provided with a By-pass branch road, with wavelength is that the 4th wavelength division multiplexer 16 of 980nm places described By-pass branch road, utilize the 4th wavelength division multiplexer 16 to be isolated in the light of propagating on the reverse direction of the direction of propagation of described light signal and suppress the MPI effect, improve the stability of EDFA output signal.
When described pump light source provides light time of 1525-1570nm wavelength coverage, described the 4th wavelength division multiplexer 16 is the 980nm wavelength coverage.
When described pump light source provides light time of 1570-1605nm wavelength coverage, described the 4th wavelength division multiplexer 16 is the 1480nm wavelength coverage.
When described pump light source provides light time of 1480-1520nm wavelength coverage, described the 4th wavelength division multiplexer 16 is the 1400nm wavelength coverage.
After flashlight enters Er-doped fiber 13 from signal input part 10, because dopant ion forms population inversion in the Er-doped fiber 13 under the effect of pump light, thereby form amplification to flashlight, provide the gain of light to incident optical signal; And pump light can not absorbed in Er-doped fiber 13 fully, some remaining pump light can be delivered to Er-doped fiber 18 places by the By-pass branch road to be continued flashlight is amplified, when optical signal transmission can produce reflected light during to Er-doped fiber 18 place end faces, and most of reflected light can enter the By-pass branch road, with the flashlight generation MPI effect of forward transmitted; The wavelength division multiplexer 16 that is arranged on the By-pass branch road can be by the light signal of forward, then can effective isolation to reverse light signal, suppressed the MPI effect greatly, and improve the stability of output light signal.
As shown in Figure 3, be the structural representation of the utility model second embodiment image intensifer, described image intensifer comprises signal input part 10, pump light source 11 and first photo-coupler 12, gain fibre 13, second photo-coupler 14, optical device unit 15, the 3rd photo-coupler 17, gain fibre 18, optoisolator 19, the signal output part 20 that connect successively.
The output terminal of described pump light source 11 links to each other with signal input part 10 by first photo-coupler 12, and first photo-coupler 12 is used for flashlight and pump light are lumped together; Described gain fibre 13 is an Er-doped fiber; Optoisolator 19 is used to suppress the light reflection, to guarantee the image intensifer working stability; Described optical device unit 15 comprises a kind of or wherein several combination in optoisolator (ISO), adjustable optical attenuator (VOA), dispersion compensation module (DCM), the gain flattening filter (GFF).
On described optical device unit 15, be provided with a By-pass branch road, the integrated device 16 that isolator and photo-coupler is synthetic " places described By-pass branch road; utilize the synthetic integrated device 16 of described isolator and photo-coupler " and is isolated in the light of propagating on the reverse direction of the direction of propagation of described light signal to suppress the MPI effect, the stability of raising EDFA output signal.
When described pump light source provides light time of 1525-1570nm wavelength coverage, the synthetic integrated device 16 of described isolator and photo-coupler " is the 980nm wavelength coverage.
When described pump light source provides light time of 1570-1605nm wavelength coverage, the synthetic integrated device 16 of described isolator and photo-coupler " is the 1480nm wavelength coverage.
When described pump light source provides light time of 1480-1520nm wavelength coverage, the synthetic integrated device 16 of described isolator and photo-coupler " is the 1400nm wavelength coverage.
After flashlight enters Er-doped fiber 13 from signal input part 10, because dopant ion forms population inversion in the Er-doped fiber 13 under the effect of pump light, thereby form amplification to flashlight, provide the gain of light to incident optical signal; And pump light can not absorbed in Er-doped fiber 13 fully, some remaining pump light can be delivered to Er-doped fiber 18 places by the By-pass branch road to be continued flashlight is amplified, when optical signal transmission can produce reflected light during to Er-doped fiber 18 place end faces, and most of reflected light can enter the By-pass branch road, with the flashlight generation MPI effect of forward transmitted; Be arranged on the synthetic integrated device 16 of isolator on the By-pass branch road and photo-coupler " can be by the light signal of forward, then can effective isolation to reverse light signal, suppressed the MPI effect greatly, improve the stability of output light signal.
As mentioned above, because the utility model adopts the optical device that wavelength division multiplexer or its integratorization are set on the By-pass of image intensifer branch road, effectively suppressed the MPI effect, has not only improved the stability of output signal, and also have design convenient, the characteristics that cost is low, efficient is high.
Although specifically introduced the utility model in conjunction with preferred embodiment; but the those skilled in the art should be understood that; in the spirit and scope of the present utility model that do not break away from appended claims and limited; can make various variations to the utility model in the form and details, be protection domain of the present utility model.
Claims (6)
1. an image intensifer comprises signal input part (10), pump light source (11) and the photo-coupler (12), gain fibre (13), photo-coupler (14), optical device unit (15), photo-coupler (17), gain fibre (18), optoisolator (19), the signal output part (20) that connect successively; The output terminal of described pump light source (11) links to each other with signal input part (10) by photo-coupler (12), it is characterized in that: locate to be parallel with a branch road in described optical device unit (15), photo-coupler (16) is placed described branch road, utilize photo-coupler (16) to be isolated in the light of propagating on the reverse direction of the direction of propagation of described light signal and suppress the MPI effect.
2. image intensifer as claimed in claim 1 is characterized in that: described photo-coupler (16) adopts single wavelength division multiplex device.
3. image intensifer as claimed in claim 1 is characterized in that: described photo-coupler (16) adopts the integrator device.
4. image intensifer as claimed in claim 3 is characterized in that: described integrator device is isolator and synthetic integrated device (16 ") of photo-coupler.
5. image intensifer as claimed in claim 1 is characterized in that: described gain fibre (18) is an Er-doped fiber.
6. image intensifer as claimed in claim 1 is characterized in that: described optical device unit (15) comprises optoisolator, adjustable optical attenuator, dispersion compensation module, gain flattening filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200564707U CN201757826U (en) | 2010-01-13 | 2010-01-13 | Light amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200564707U CN201757826U (en) | 2010-01-13 | 2010-01-13 | Light amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201757826U true CN201757826U (en) | 2011-03-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200564707U Expired - Fee Related CN201757826U (en) | 2010-01-13 | 2010-01-13 | Light amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201757826U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697418A (en) * | 2019-03-13 | 2020-09-22 | 武汉奥新科技有限公司 | Single pump gain range switchable optical amplifier for optical fiber transmission |
| CN114361936A (en) * | 2022-01-04 | 2022-04-15 | 武汉光迅科技股份有限公司 | Mixed Bypass optical structure in EDFA |
-
2010
- 2010-01-13 CN CN2010200564707U patent/CN201757826U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697418A (en) * | 2019-03-13 | 2020-09-22 | 武汉奥新科技有限公司 | Single pump gain range switchable optical amplifier for optical fiber transmission |
| CN111697418B (en) * | 2019-03-13 | 2021-05-11 | 武汉奥新科技有限公司 | Single pump gain range switchable optical amplifier for optical fiber transmission |
| CN114361936A (en) * | 2022-01-04 | 2022-04-15 | 武汉光迅科技股份有限公司 | Mixed Bypass optical structure in EDFA |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Agner information technology (Shenzhen) Co., Ltd. financial Document name: Notification of Approving Refund |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110309 Termination date: 20190113 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |