Dual-wavelength four-light-source dual-backup high-reliability light amplification system

Abstract

The utility model relates to a dual-wavelength four-light-source dual-backup high-reliability light amplification system, which comprises a first beam combiner used for combining two beams of light with a first wavelength and outputting the combined light; the second beam combiner is used for combining the two beams of light with the second wavelength and then outputting the combined light; the coupler is respectively connected with the first beam combiner and the second beam combiner and is used for respectively coupling the light with the first wavelength and the light with the second wavelength into the first light amplification unit and the second light amplification unit; the optical switch is connected with the first optical amplification unit and the second optical amplification unit and is used for coupling the output light into the wavelength division multiplexer; the wavelength division multiplexer is connected with the optical switch and outputs the amplified signal light with the first wavelength and the amplified signal light with the second wavelength respectively; the first wavelength is not equal to the second wavelength. According to the utility model, two different wavelengths are used, and the two wavelengths are divided into two independent signal light sources. According to the whole system, the signal light source achieves double backup, the optical amplifier achieves double backup, and therefore the high-reliability and high-power light source system is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of optics, and in particular to a dual-wavelength four-light-source dual-backup highly reliable optical amplification system. Background Technique

[0002] The technical difficulties of the existing dual-wavelength lasers lie in reliability design, high output power realization, dual-wavelength coupling methods, etc.

[0003] For example, a patent with the application number 201710736602.7 discloses a dual-wavelength laser, which relates to the technical field of solid-state lasers, including a pump light source, a coupling unit, an optical crystal, a double concave mirror and a combined collimating mirror. Along the light emission direction of the pump light source, the pump light source, the coupling unit, the optical crystal, the double concave mirror and the combined collimating mirror are arranged in sequence. The combined collimating mirror includes a first collimating mirror and a second collimating mirror. The first collimating mirror is annular, and the second collimating mirror is arranged in the hollow cavity formed by the first collimating mirror. The semiconductor laser simultaneously outputs near-infrared laser and self-doubled visible light through the optical crystal. The dual-wavelength laser realizes the simultaneous output of near-infrared laser and visible laser by a single laser, and through certain collimation and shaping, the two-wavelength lasers are output coaxially, saving costs, reducing the adjustment difficulty, and reducing the overall size of the laser. The above dual-wavelength laser realizes the simultaneous output of near-infrared laser and visible laser by a single laser. However, the output power is small and the reliability is low. Summary of the Utility Model

[0004] In order to solve the above problems of the existing technology, the utility model provides a dual-wavelength four-light-source dual-backup highly reliable optical amplification system.

[0005] In order to achieve the above purpose, the main technical solutions adopted by the utility model include:

[0006] A dual-wavelength four-light-source dual-backup highly reliable optical amplification system, including

[0007] A first beam combiner for combining two beams of light of the first wavelength and then outputting;

[0008] A second beam combiner for combining two beams of light of the second wavelength and then outputting;

[0009] A coupler, respectively connected to the first beam combiner and the second beam combiner, and coupling the light of the first wavelength and the second wavelength into the first optical amplification unit and the second optical amplification unit respectively;

[0010] An optical switch, connected to the first optical amplification unit and the second optical amplification unit, and used for coupling the output light into the wavelength division multiplexer;

[0011] A wavelength division multiplexer, connected to the optical switch, and respectively outputting the amplified first wavelength and second wavelength signal lights;

[0012] The first wavelength is not equal to the second wavelength.

[0013] Furthermore, both the first beam combiner and the second beam combiner are polarization-insensitive beam combiners with isolation.

[0014] Furthermore, both the first beam combiner and the second beam combiner are dense wavelength division multiplexers.

[0015] Furthermore, the coupler is a 2x2 coupler or a 2x2 optical switch.

[0016] Furthermore, the optical switch is a magneto-optical switch.

[0017] Furthermore, both the first optical amplification unit and the second optical amplification unit include active optical fibers; the active optical fibers are connected to a beam combiner to couple pump light into the active optical fibers to achieve optical amplification.

[0018] Furthermore, the beam combiner integrates an isolator function.

[0019] Furthermore, power monitors are respectively connected to the input ends of the beam combiner.

[0020] Furthermore, the coupler includes a first wavelength division multiplexer and a 1x2 magneto-optical switch; the input ends of the first wavelength division multiplexer are respectively connected to the output ends of the first beam combiner and the second beam combiner; the output end of the first wavelength division multiplexer is coupled to the input end of the 1x2 magneto-optical switch; the output ends of the 1x2 magneto-optical switch are respectively connected to the first optical amplification unit and the second optical amplification unit.

[0021] The beneficial effects of the present utility model are as follows: The dual wavelength is reflected in using two different wavelengths, and the two wavelengths are divided into two independent signal light sources; two independent optical amplifiers work independently and use independent pump sources; the two light sources of the two wavelengths can respectively enter the two optical amplifiers; the two optical amplifiers can work separately or simultaneously; the optical signals amplified by the two optical amplifiers can be combined and enter the output ends corresponding to the respective wavelengths. In the whole system, the signal light sources are dual-backup, and the optical amplifiers are dual-backup, thus realizing a high-reliability and high-power light source system. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 is a schematic structural view of the present utility model;

[0024] Figure 2 is a schematic view of another embodiment of the structure of the present utility model;

[0025] Figure 3 is a schematic view of another embodiment of the structure of the present utility model;

[0026] Figure 4 is a schematic view of another embodiment of the structure of the present utility model;

[0027] Figure 5 is a schematic structural view of the coupler of the present utility model;

[0028] Description of reference numerals: 100, first beam combiner; 200, second beam combiner; 300, coupler; 310, first wavelength division multiplexer; 320, 1x2 magneto-optical switch; 410, first optical amplification unit; 411, active optical fiber; 412, beam combiner; 413, power monitor; 414, pump light source; 420, second optical amplification unit; 421, active optical fiber; 422, beam combiner; 423, power monitor; 424, pump light source; 500, optical switch; 600, wavelength division multiplexer. Detailed implementation manners

[0029] To make the purposes, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] A dual-wavelength four-light-source dual-backup highly reliable optical amplification system includes two optical paths respectively connected to a coupler 300; one of the optical paths includes a first beam combiner 100, a coupler 300, and a first optical amplification unit 410 arranged in sequence; the other optical path includes a second beam combiner 200, a coupler 300, and a second optical amplification unit 420 arranged in sequence;

[0033] The two input ends of the first beam combiner 100 are respectively connected to signal lights of two first wavelengths, and after combining them, the output is obtained; the two signal lights of the first wavelength are defined as A1 and A2 respectively; the combined signal light of the first wavelength is A; one of A1 and A2 acts as the main light source and the other acts as the backup light source. When one of them fails, the other can also achieve signal transmission to achieve the backup effect; A1 and A2 can also be two polarized lights with different polarization states;

[0034] The two input ends of the second beam combiner 200 are respectively connected to signal lights of two second wavelengths, and after combining them, the output is obtained; the two signal lights of the second wavelength are defined as B1 and B2 respectively; the combined signal light of the second wavelength is B; one of B1 and B2 acts as the main light source and the other acts as the backup light source. When one of them fails, the other can also achieve signal transmission to achieve the backup effect; B1 and B2 can also be two polarized lights with different polarization states; where the first wavelength is not equal to the second wavelength;

[0035] In one embodiment, the coupler 300 is a 2x2 coupler or a 2x2 optical switch. Two signal lights with different wavelengths are respectively coupled into the first optical amplification unit 410 and the second optical amplification unit 420 through the coupler 300 for amplifying the signal lights; the amplified signal lights are then coupled into the wavelength division multiplexer 600 through the optical switch 500 to output signal lights of two wavelengths respectively; the optical switch 500 is a magneto-optical switch with a loss of approximately 0.4 dB and a built-in isolation of 23 dB; further, both the first beam combiner 100 and the second beam combiner 200 are polarization beam combiners with isolation, such as Figure 1 shown.

[0036] As Figure 2 shown, in one embodiment, both the first beam combiner 100 and the second beam combiner 200 are dense wavelength division multiplexers.

[0037] As Figure 3As shown, in one embodiment, the first optical amplification unit 410 includes an active optical fiber 411; the active optical fiber 411 is connected to a beam combiner 412 to couple pump light into the active optical fiber 411 to achieve optical amplification; the beam combiner 412 integrates an isolator function; a power monitor 413 is connected to the input end of the beam combiner 412; the first wavelength signal light A is connected to the beam combiner 412 through a coupler 300, the output end of the beam combiner 412 is connected to the active optical fiber 411, and a pump light source 414 is also connected to the beam combiner 412. The pump light of the pump light source 414 is coupled into the active optical fiber 411 through the beam combiner 412 to amplify the first wavelength signal light; the power monitor 413 can detect the intensity of the first wavelength signal light input into the beam combiner 412 in real time; in another optical path, the second optical amplification unit 420 includes an active optical fiber 421; the active optical fiber 421 is connected to a beam combiner 422 to couple pump light into the active optical fiber 421 to achieve optical amplification; the beam combiner 422 integrates an isolator function; a power monitor 423 is connected to the input end of the beam combiner 422; the second wavelength signal light B is connected to the beam combiner 422 through a coupler 300, the output end of the beam combiner 422 is connected to the active optical fiber 421, and a pump light source 424 is also connected to the beam combiner 422. The pump light of the pump light source 424 is coupled into the active optical fiber 421 through the beam combiner 422 to amplify the second wavelength signal light B; the power monitor 423 can detect the intensity of the second wavelength signal light B input into the beam combiner 422 in real time; the pump light wavelengths of the pump light source 414 and the pump light source 424 can be the same or different. Usually, the pump light wavelength is 940 nm or 980 nm; further, the signal lights of the two wavelengths are coupled into a wavelength division multiplexer 600 through an optical switch for output; in this embodiment, the signal lights A1 and A2 are backups of each other, the signal lights B1 and B2 are backups of each other, and at the same time, the signal light A and the signal light B are backups of each other, thereby greatly improving the reliability of the optical device;

[0038] As Figure 4 shown, compared with the previous embodiment, in this embodiment, the first beam combiner 100 and the second beam combiner 200 are replaced with a dense wavelength division multiplexer.

[0039] In one embodiment, the coupler 300 includes a first wavelength division multiplexer 310 and a 1x2 magneto-optical switch 320; the input ends of the first wavelength division multiplexer 310 are respectively connected to the output ends of the first beam combiner 100 and the second beam combiner 200; the output end of the first wavelength division multiplexer 310 is coupled to the input end of the 1x2 magneto-optical switch 320; the output ends of the 1x2 magneto-optical switch 320 are respectively connected to the first optical amplification unit 410 and the second optical amplification unit 420; the conduction direction of the 1x2 magneto-optical switch 320 has a built-in reverse isolation of 25 dB, and an additional isolator may not be required, reducing costs.

[0040] The above are only the embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in the relevant technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A dual-wavelength four-light-source dual-backup highly reliable optical amplification system, characterized in that: including a first beam combiner (100) for combining two beams of light with a first wavelength and outputting the combined light; a second beam combiner (200) for combining two beams of light with a second wavelength and outputting the combined light; a coupler (300) connected to the first beam combiner (100) and the second beam combiner (200) respectively, and coupling the light with the first wavelength and the second wavelength into a first optical amplification unit (410) and a second optical amplification unit (420) respectively; an optical switch (500) connected to the first optical amplification unit (410) and the second optical amplification unit (420), and used for coupling the output light into a wavelength division multiplexer (600); a wavelength division multiplexer (600) connected to the optical switch (500) and outputting the amplified signal light with the first wavelength and the second wavelength respectively; the first wavelength and the second wavelength are not equal.

2. The dual-wavelength four-light-source dual-backup highly reliable optical amplification system according to claim 1, wherein: Both the first beam combiner (100) and the second beam combiner (200) are polarization-insensitive beam combiners with isolation.

3. A dual-wavelength four-light-source dual-backup highly reliable optical amplification system according to claim 1, characterized in that: Both the first beam combiner (100) and the second beam combiner (200) are dense wavelength division multiplexers.

4. A dual-wavelength four-light-source dual-backup highly reliable optical amplification system according to claim 1, characterized in that: The coupler (300) is a 2x2 coupler or a 2x2 optical switch.

5. A dual-wavelength four-light-source dual-backup highly reliable optical amplification system according to claim 1, characterized in that: The optical switch (500) is a magneto-optical switch.

6. The dual-wavelength four-light-source dual-backup highly reliable optical amplification system according to claim 1, wherein: Both the first optical amplification unit (410) and the second optical amplification unit (420) include active optical fibers; the active optical fibers are connected with beam combiners to couple pump light into the active optical fibers to achieve optical amplification.

7. A dual-wavelength four-light-source dual-backup highly reliable optical amplification system according to claim 6, characterized in that: The beam combiner integrates an isolator function.

8. A dual-wavelength four-light-source dual-backup highly reliable optical amplification system according to claim 6, characterized in that: Power monitors are respectively connected to the input ends of the beam combiner.

9. A dual-wavelength four-light-source dual-backup highly reliable optical amplification system according to claim 1, characterized in that: The coupler (300) includes a first wavelength division multiplexer (310) and a 1x2 magneto-optical switch (320); the input ends of the first wavelength division multiplexer (310) are respectively connected to the output ends of the first beam combiner (100) and the second beam combiner (200); the output end of the first wavelength division multiplexer (310) is coupled to the input end of the 1x2 magneto-optical switch (320); the output ends of the 1x2 magneto-optical switch (320) are respectively connected to the first optical amplification unit (410) and the second optical amplification unit (420).

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