A hybrid amplifier

Abstract

The application relates to the technical field of communication, and provides a hybrid amplifier which comprises a Raman amplification component, a fiber amplification component and a pumping component; a first output end of the pumping component is connected to a pumping input end of the Raman amplification component, a second output end of the pumping component is connected to a pumping input end of the fiber amplification component, and a signal output end of the Raman amplification component is connected to a signal input end of the fiber amplification component; the pumping component is used for generating first pumping light and second pumping light; the Raman amplification component is used for performing one-time amplification on an input signal by using the first pumping light to obtain a first signal; and the fiber amplification component is used for performing two-time amplification on the first signal by using the second pumping light to obtain a second signal. The application realizes high-gain and low-noise signal light power output by using the Raman effect to pre-amplify the input signal in advance and then performing two-time amplification by using the fiber amplifier.

Description

Technical Field

[0001] This invention relates to the field of communication technology, and in particular to a hybrid amplifier. Background Technology

[0002] With the development of fiber optic amplification technology and the continuous improvement of current service traffic and access capabilities, more and more companies are inclined to minimize resource investment during product development in order to design high-capacity, high-gain fiber optic amplifiers suitable for ultra-high-speed backbone networks. In the e-band, traditional fiber optic amplification technology has poor gain and a high noise figure, making it difficult to meet the high requirements of optical signal-to-noise ratio (OSNR) in transmission network systems. On the other hand, Raman amplifiers, with their unique advantages of low noise, wide-spectrum amplification, and strong adaptability to various fiber types, are increasingly widely used in backbone transmission systems. However, the limited gain of Raman amplification means that existing amplifiers are no longer sufficient to meet the requirements of high-gain, low-noise signal amplification.

[0003] Therefore, overcoming the shortcomings of the existing technology is an urgent problem to be solved in this technical field. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that amplifiers in the prior art are difficult to meet the amplification requirements of high gain and low noise.

[0005] The present invention adopts the following technical solution:

[0006] A hybrid amplifier includes a Raman amplification component 1, an optical fiber amplification component 2, and a pump component 3;

[0007] The first output terminal of the pump component 3 is connected to the pump input terminal of the Raman amplification component 1, the second output terminal of the pump component 3 is connected to the pump input terminal of the fiber amplification component 2, and the signal output terminal of the Raman amplification component 1 is connected to the signal input terminal of the fiber amplification component 2.

[0008] The pumping component 3 is used to generate a first pump light and a second pump light, transmit the first pump light to the Raman amplification component 1, and transmit the second pump light to the fiber amplification component 2;

[0009] The Raman amplification component 1 is used to amplify the input signal once using the first pump light to obtain a first signal; the fiber amplification component 2 is used to amplify the first signal a second time using the second pump light to obtain a second signal.

[0010] Preferably, the pump assembly 3 includes a first pump unit 31, a second pump unit 32, a first wave splitter unit 33, and a first wave combiner unit 34;

[0011] The output terminal of the first pump unit 31 is connected to the first input terminal of the first multiplexing unit 34;

[0012] The output of the second pump unit 32 is connected to the input of the first wavelength division unit 33, one output of the first wavelength division unit 33 is connected to the pump input of the fiber optic amplifier assembly 2, and the other output of the first wavelength division unit 33 is connected to the second input of the first wavelength combination unit 34.

[0013] The output terminal of the first combiner unit 34 is connected to the pump input terminal of the Raman amplifier component 1;

[0014] The first pump unit 31 is used to generate a first basic pump light, and the second pump unit 32 is used to generate a second basic pump light;

[0015] The first wavelength division unit 33 is used to split the second basic pump light into a first intermediate pump light and a second intermediate pump light, transmit the first intermediate pump light as the second pump light to the fiber amplification component 2, and transmit the second intermediate pump light to the first wavelength combination unit 34.

[0016] The first multiplexing unit 34 is used to multiplex the second intermediate pump light with the first basic pump light to obtain the first pump light, and transmit the first pump light to the Raman amplification component 1.

[0017] Preferably, the first pumping unit 31 includes a first polarization pump laser 310, a second polarization pump laser 311, and a combiner 312;

[0018] The output terminals of the first polarization pump laser 310 and the second polarization pump laser 311 are respectively connected to the two input terminals of the combiner 312, and the output terminal of the combiner 312 is connected to the first input terminal of the first combiner unit 34.

[0019] The first polarization pump laser 310 is used to generate pump light in a first polarization direction, the second polarization pump laser 311 is used to generate pump light in a second polarization direction, and the combiner 312 is used to combine the pump light in the first polarization direction and the pump light in the second polarization direction to obtain the first basic pump light.

[0020] Preferably, the pump assembly 3 further includes a first switching assembly 35;

[0021] The input terminal of the first switching assembly 35 is connected to the output terminal of the second pump unit 32, one output terminal of the first switching assembly 35 is connected to the input terminal of the first demultiplexing unit 33, and the other output terminal of the first switching assembly 35 is connected to the second input terminal of the first multiplexing unit 34.

[0022] The first switching assembly 35 is used to selectively transmit the second basic pump light to the first wavelength division unit 33, so that the second intermediate pump light is combined with the light from other input terminals of the first wavelength division unit 34 to obtain the first pump light; or, to transmit the second basic pump light to the first wavelength division unit 34, so that the second basic pump light is combined with the light from other input terminals of the first wavelength division unit 34 to obtain the first pump light.

[0023] Preferably, the pump assembly 3 further includes a third pump unit 36 ​​and a second wave-splitting unit 37;

[0024] The output terminal of the third pump unit 36 ​​is connected to the input terminal of the second wave division unit 37, one output terminal of the second wave division unit 37 is connected to the other pump input terminal of the fiber optic amplifier assembly 2, and the other output terminal of the second wave division unit 37 is connected to the third input terminal of the first wave combination unit 34.

[0025] The third pump unit 36 ​​is used to generate a third basic pump light, and the second wavelength division unit 37 is used to split the third basic pump light into a third intermediate pump light and a fourth intermediate pump light. The third intermediate pump light is transmitted to the fiber optic amplification component 2 as the third pump light so that the fiber optic amplification component 2 can use the second pump light and the third pump light to amplify the first signal a second time.

[0026] The fourth intermediate pump light is transmitted to the first multiplexing unit 34, which combines the fourth intermediate pump light with light from other input terminals of the first multiplexing unit 34 to obtain the first pump light, which is then transmitted to the Raman amplification component 1.

[0027] Preferably, the pump assembly 3 further includes a second switching assembly 38;

[0028] The input terminal of the second switching assembly 38 is connected to the output terminal of the third pump unit 36, one output terminal of the second switching assembly 38 is connected to the input terminal of the second demultiplexing unit 37, and the other output terminal of the second switching assembly 38 is connected to the third input terminal of the first multiplexing unit 34.

[0029] The second switching assembly 38 is used to selectively transmit the third basic pump light to the second wavelength division unit 37, so that the fourth intermediate pump light is combined with the light from other input terminals of the first wavelength division unit 34 to obtain the first pump light; or, to transmit the third basic pump light to the first wavelength division unit 34, so that the third basic pump light is combined with the light from other input terminals of the first wavelength division unit 34 to obtain the first pump light.

[0030] Preferably, the hybrid amplifier further includes a third switching component 4;

[0031] The input terminal of the third switching component 4 is connected to the signal output terminal of the Raman amplification component 1, one output terminal of the third switching component 4 is connected to the signal output terminal of the hybrid amplifier, and the other output terminal of the third switching component 4 is connected to the signal input terminal of the fiber amplification component 2.

[0032] The third switching component 4 is used to selectively transmit the first signal to the Raman amplification component 1 so that the Raman amplification component 1 can amplify the first signal a second time to obtain the second signal; or, transmit the first signal to the signal output terminal of the hybrid amplifier for output.

[0033] Preferably, a first detection component 5 is connected between the output end of the Raman amplification component 1 and the input end of the fiber amplification component 2, and a second detection component 6 is connected to the output end of the hybrid amplifier.

[0034] The first detection component 5 is used to detect the power of the first signal, and the second detection component 6 is used to detect the power of the output signal of the hybrid amplifier.

[0035] Preferably, an isolator 7 is also connected between the output end of the Raman amplification component 1 and the input end of the fiber amplification component 2.

[0036] Preferably, the transmission direction of the first pump light in the Raman amplification component 1 is opposite to the transmission direction of the input signal in the Raman amplification component 1, so as to achieve backward Raman amplification.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows: By connecting a Raman amplification component before the fiber optic amplification component, the input signal is pre-amplified by utilizing the Raman effect before being passed through the fiber optic amplifier, thereby achieving low noise using the Raman amplification component and increasing the amplification gain using the fiber optic amplification component, thus achieving high-gain, low-noise signal optical power output. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of a hybrid amplifier module provided in an embodiment of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of the first hybrid amplifier provided in the embodiment of the present invention;

[0041] Figure 3 This is a schematic diagram of the structure of the second hybrid amplifier provided in the embodiment of the present invention;

[0042] Figure 4 This is a schematic diagram of the structure of the third hybrid amplifier provided in the embodiments of the present invention;

[0043] Figure 5 This is a schematic diagram of the structure of the fourth hybrid amplifier provided in the embodiments of the present invention;

[0044] Figure 6 This is a schematic diagram of the structure of the fifth hybrid amplifier provided in the embodiments of the present invention;

[0045] Figure 7 This is a schematic diagram of the sixth hybrid amplifier provided in the embodiments of the present invention;

[0046] Figure 8 This is a schematic diagram of the structure of the seventh hybrid amplifier provided in the embodiments of the present invention;

[0047] Figure 9 This is a schematic diagram of the structure of the eighth hybrid amplifier provided in the embodiments of the present invention;

[0048] Figure 10 This is a schematic diagram of the structure of the ninth hybrid amplifier provided in the embodiments of the present invention;

[0049] Figure 11 This is a schematic diagram of the tenth hybrid amplifier provided in the embodiments of the present invention.

[0050] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0051] 1. Raman amplification assembly; 2. Fiber optic amplification assembly; 3. Pump assembly; 31. First pump unit; 310. First polarization-pumped laser; 311. Second polarization-pumped laser; 312. Waveform combiner; 32. Second pump unit; 33. First wave-splitting unit; 34. First wave-splitting unit; 341. First coupler; 342. Second coupler; 343. Third coupler; 344. Fourth coupler; 35. First switching assembly; 36. Third pump unit; 37. Second wave-splitting unit; 38. Second switching assembly; 4. Third switching assembly; 5. First detection assembly; 6. Second detection assembly; 61. Second Raman detection assembly; 62. Second fiber optic detection assembly; 7. Isolator; 8. Fourth switching assembly. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0053] In the description of this invention, the terms "inner", "outer", "longitudinal", "lateral", "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and do not require that this invention must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0054] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0055] In this application, unless otherwise expressly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, the term "coupled" can refer to an electrical connection that enables signal transmission.

[0056] Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0057] Example 1:

[0058] Existing amplifiers are insufficient to meet the requirements of high gain and low noise amplification. To address this issue, Embodiment 1 of this invention provides a hybrid amplifier, such as... Figure 1 As shown, it includes a Raman amplification component 1, an optical fiber amplification component 2, and a pump component 3.

[0059] The first output terminal of the pump component 3 is connected to the pump input terminal of the Raman amplification component 1, the second output terminal of the pump component 3 is connected to the pump input terminal of the fiber amplification component 2, and the signal output terminal of the Raman amplification component 1 is connected to the signal input terminal of the fiber amplification component 2.

[0060] The pumping component 3 is used to generate a first pump light and a second pump light, transmit the first pump light to the Raman amplification component 1, and transmit the second pump light to the fiber amplification component 2.

[0061] The Raman amplification component 1 is used to amplify the input signal once using the first pump light to obtain a first signal; the fiber amplification component 2 is used to amplify the first signal a second time using the second pump light to obtain a second signal.

[0062] In practical applications, the pumping component 3 may include a first pump laser and a second pump laser. The output of the first pump laser is connected to the pump input of the Raman amplification component 1, and the output of the second pump laser is connected to the pump input of the fiber amplification component 2.

[0063] The fiber optic amplification component 2 may include a bismuth-doped fiber amplifier and a coupler. The output end of the coupler is connected to one end of the bismuth-doped fiber, and the two input ends of the coupler are the signal input end and the pump input end of the fiber optic amplification component 2, respectively. The other end of the bismuth-doped fiber is the signal output end of the fiber optic amplification component 2. Similarly, the Raman amplification component 1 may include a Raman fiber and a coupler. The output end of the coupler is connected to one end of the Raman fiber, and the two input ends of the coupler are the signal input end and the pump input end of the Raman amplification component 1, respectively. The other end of the Raman fiber is the signal output end of the Raman amplification component 1.

[0064] It should be noted here that... Figure 1The pump input terminals of Raman amplification component 1 and fiber amplification component 2 shown in the diagram are merely illustrative. In actual use, the pump input terminal of Raman amplification component 1 can be located on the same side as the signal input terminal of Raman amplification component 1, in which case Raman amplification component 1 performs forward Raman amplification of the input signal. Alternatively, the pump input terminal of Raman amplification component 1 can be located on the opposite side of the signal input terminal of Raman amplification component 1, in which case Raman amplification component 1 performs backward Raman amplification of the input signal. Similarly, the pump input terminal of fiber amplification component 2 can be located on the same side as the signal input terminal of fiber amplification component 2, in which case fiber amplification component 2 performs forward amplification of the input signal. Alternatively, the pump input terminal of fiber amplification component 2 can be located on the opposite side of the signal input terminal of fiber amplification component 2, in which case fiber amplification component 2 performs backward amplification of the input signal.

[0065] In this embodiment, a Raman amplifier component 1 is connected before the fiber optic amplifier component 2. The input signal is pre-amplified by utilizing the Raman effect and then passed through a bismuth-doped fiber amplifier. Thus, the Raman amplifier component 1 achieves low noise, and the fiber optic amplifier component 2 increases the amplification gain, thereby achieving high-gain, low-noise signal optical power output.

[0066] In practical applications, fiber optic amplifiers typically have a certain saturation power. That is, when the amplification gain reaches saturation, increasing the pump light power input to the fiber optic amplifier will not increase the amplification gain further. At this point, the utilization rate of the pump light decreases. To improve the utilization efficiency of the pump light, this embodiment provides a preferred implementation method, such as... Figure 2 As shown, the pump assembly 3 includes a first pump unit 31, a second pump unit 32, a first wave splitter unit 33, and a first wave combiner unit 34.

[0067] The output of the first pump unit 31 is connected to the first input of the first multiplexing unit 34; the output of the second pump unit 32 is connected to the input of the first demultiplexing unit 33, one output of the first demultiplexing unit 33 is connected to the pump input of the fiber optic amplifier 2, and the other output of the first demultiplexing unit 33 is connected to the second input of the first multiplexing unit 34; the output of the first multiplexing unit 34 is connected to the pump input of the Raman amplifier 1; the first pump unit 31 is used to generate a first basic pump light, and the second pump unit 32 is used to generate a second basic pump light.

[0068] The first wavelength division unit 33 is used to split the second basic pump light to obtain a first intermediate pump light and a second intermediate pump light, transmit the first intermediate pump light as the second pump light to the fiber amplification component 2, and transmit the second intermediate pump light to the first wavelength combination unit 34; the first wavelength combination unit 34 is used to combine the second intermediate pump light with the first basic pump light to obtain a first pump light, and transmit the first pump light to the Raman amplification component 1.

[0069] The first multiplexing unit 34 can be obtained by cascading one or more couplers, and the second multiplexing unit can be obtained by cascading one or more couplers. The first pump unit 31 can be a 1340nm pump laser, and the second pump unit 32 can be a 1310nm pump laser. Figure 3 In the above, IN is the signal input terminal of the hybrid amplifier, OUT is the signal output terminal of the hybrid amplifier, the pump input terminal of the Raman amplification component 1 is the opposite of the signal input terminal of the Raman amplification component 1, that is, the transmission direction of the first pump light in the Raman amplification component 1 is opposite to the transmission direction of the input signal in the Raman amplification component 1, so as to realize backward Raman amplification, and the fiber amplification component 2 performs forward amplification on the first signal.

[0070] In this embodiment, the pump light of the second pump unit 32 is split, so that part of the pump light enters the fiber optic amplification component 2 as the second pump light, and the other part of the pump light enters the Raman amplification component 1. This allows the pump light that cannot be effectively used by the fiber optic amplification component 2 to enter the Raman amplification component 1 for signal amplification, thereby improving the utilization efficiency of the pump light.

[0071] This embodiment also provides a preferred implementation method, such as... Figure 3 As shown, the first pump unit 31 includes a first polarization pump laser 310, a second polarization pump laser 311, and a combiner 312. The output terminals of the first polarization pump laser 310 and the second polarization pump laser 311 are respectively connected to the two input terminals of the combiner 312, and the output terminal of the combiner 312 is connected to the first input terminal of the first combiner unit 34. The first polarization pump laser 310 is used to generate pump light in a first polarization direction, the second polarization pump laser 311 is used to generate pump light in a second polarization direction, and the combiner 312 is used to combine the pump light in the first polarization direction and the pump light in the second polarization direction to obtain the first basic pump light.

[0072] The multiplexer 312 may be embodied as an Isolate Polarization Beam Combiner (IPBC) in form. The first polarization direction may be the P direction, and the second polarization direction may be the S direction. The multiplexer 312 combines the pump light in the P direction and the pump light in the S direction into natural light and transmits it to the Raman amplification component 1, thereby reducing the polarization sensitivity of the Raman amplification component 1 and increasing the saturation power of the Raman amplification component 1 to a certain extent.

[0073] In an alternative embodiment, as Figure 4 shown, the pump component 3 further includes a first switch component 35. The input end of the first switch component 35 is connected to the output end of the second pump unit 32. One output end of the first switch component 35 is connected to the input end of the first demultiplexing unit 33, and the other output end of the first switch component 35 is connected to the second input end of the first multiplexing unit 34. The first switch component 35 is configured to selectively transmit the second basic pump light to the first demultiplexing unit 33, so that the second intermediate pump light is multiplexed with the light from other input ends of the first multiplexing unit 34 to obtain the first pump light; or, transmit the second basic pump light to the first multiplexing unit 34, so that the second basic pump light is multiplexed with the light from other input ends of the first multiplexing unit 34 to obtain the first pump light.

[0074] The first switch component 35 may be a 1×2 optical switch, and the light from other input ends of the first multiplexing unit 34 Figure 4 refers to the first basic pump light from the first input end of the first multiplexing unit 34 herein.

[0075] To further increase the amplification gain of the hybrid amplifier, the optical fiber amplification component 2 may also perform co-directional amplification on the first signal. In an alternative embodiment, as Figure 5 shown, the pump component 3 further includes a third pump unit 36 and a second demultiplexing unit 37. The output end of the third pump unit 36 is connected to the input end of the second demultiplexing unit 37. One output end of the second demultiplexing unit 37 is connected to the other pump input end of the optical fiber amplification component 2, and the other output end of the second demultiplexing unit 37 is connected to the third input end of the first multiplexing unit 34. That is, the optical fiber amplification component 2 has two pump input ends, one pump input end is connected to the second output end of the pump component 3, and the other pump input end is connected to one output end of the second demultiplexing unit 37.

[0076] The third pump unit 36 ​​is used to generate a third basic pump light, and the second wavelength division unit 37 is used to split the third basic pump light into a third intermediate pump light and a fourth intermediate pump light. The third intermediate pump light is transmitted to the fiber optic amplification component 2 as the third pump light so that the fiber optic amplification component 2 can use the second pump light and the third pump light to amplify the first signal a second time.

[0077] The fourth intermediate pump light is transmitted to the first multiplexing unit 34, which combines the fourth intermediate pump light with light from other input terminals of the first multiplexing unit 34 to obtain the first pump light, which is then transmitted to the Raman amplification component 1.

[0078] The fiber optic amplification assembly 2 includes a bismuth-doped fiber, a first coupler 341, and a second coupler 342. The output end of the first coupler 341 is connected to one end of the bismuth-doped fiber, and the two input ends of the first coupler 341 are the signal input end and the pump input end of the fiber optic amplification assembly 2, respectively. The output end of the second coupler 342 is connected to the other end of the bismuth-doped fiber, and the two input ends of the second coupler 342 are the signal output end and the other pump input end of the fiber optic amplification assembly 2, respectively.

[0079] The second wavelength division unit 37 can be a coupler, and the third pump unit 36 ​​can be a 1350nm pump laser. Figure 5 In this context, the light from other input terminals of the first multiplexing unit 34 depends on the connection path of the first switching component 35. For example, when the first switching component 35 transmits the second basic pump light to the first wavelength division unit 33, the light from other input terminals of the first multiplexing unit 34 is the first basic pump light and the second intermediate pump light; when the first switching component 35 transmits the second basic pump light to the first multiplexing unit 34, the light from other input terminals of the first multiplexing unit 34 is the first basic pump light and the second basic pump light.

[0080] In a preferred embodiment, such as Figure 6As shown, the pump assembly 3 further includes a second switching assembly 38; the input terminal of the second switching assembly 38 is connected to the output terminal of the third pump unit 36, one output terminal of the second switching assembly 38 is connected to the input terminal of the second wavelength division unit 37, and the other output terminal of the second switching assembly 38 is connected to the third input terminal of the first wavelength division unit 34; the second switching assembly 38 is used to selectively transmit the third basic pump light to the second wavelength division unit 37, so that the fourth intermediate pump light is combined with the light from other input terminals of the first wavelength division unit 34 to obtain the first pump light; or, to transmit the third basic pump light to the first wavelength division unit 34, so that the third basic pump light is combined with the light from other input terminals of the first wavelength division unit 34 to obtain the first pump light.

[0081] The second switching component 38 can be a 1×2 optical switch. Figure 6 This is a presentation combining this embodiment with the above-described embodiments. Figure 6 In this context, the light from other input terminals of the first multiplexing unit 34 depends on the connection path of the first switching component 35. For example, when the first switching component 35 transmits the second basic pump light to the first wavelength division unit 33, the light from other input terminals of the first multiplexing unit 34 is the first basic pump light and the second intermediate pump light; when the first switching component 35 transmits the second basic pump light to the first multiplexing unit 34, the light from other input terminals of the first multiplexing unit 34 is the first basic pump light and the second basic pump light.

[0082] In one alternative implementation, such as Figure 7 As shown, the hybrid amplifier further includes a third switching component 4; the input terminal of the third switching component 4 is connected to the signal output terminal of the Raman amplification component 1, one output terminal of the third switching component 4 is connected to the signal output terminal of the hybrid amplifier, and the other output terminal of the third switching component 4 is connected to the signal input terminal of the fiber optic amplification component 2; the third switching component 4 is used to selectively transmit the first signal to the Raman amplification component 1 so that the Raman amplification component 1 can amplify the first signal a second time to obtain a second signal; or, transmit the first signal to the signal output terminal of the hybrid amplifier for output.

[0083] The third switching component 4 can be a 1×2 optical switch. In this embodiment, by connecting the third switching component 4 between the Raman amplification component 1 and the fiber amplification component 2, two amplification methods are achieved. The first method is to use only the Raman amplification component 1 for amplification, which is suitable for low-gain scenarios. The second method is to use both the Raman amplification component 1 and the fiber amplification component 2 for amplification, which is suitable for high-gain scenarios.

[0084] Wherein, the connection of one output terminal of the third switching component 4 to the signal output terminal of the hybrid amplifier can be: one output terminal of the third switching component 4 and the signal output terminal of the Raman amplification component 1 are connected together to the signal output terminal of the hybrid amplifier through a coupler, a fourth switching component 8, etc., as shown below. Figure 9 The fourth switch component 8 is used for connection.

[0085] In alternative implementations, such as Figure 8 As shown, an isolator 7 is also connected between the output end of the Raman amplification component 1 and the input end of the fiber amplification component 2 to prevent the third pump light transmitted in reverse in the fiber amplification component 2 from affecting the Raman amplification component 1.

[0086] In practical application scenarios, such as Figure 9 As shown, a first detection component 5 is connected between the output of the Raman amplification component 1 and the input of the fiber amplification component 2, and a second detection component 6 is connected to the output of the hybrid amplifier. The first detection component 5 is used to detect the power of the first signal, and the second detection component 6 is used to detect the power of the output signal of the hybrid amplifier. Both the first detection component 5 and the second detection component 6 can be obtained by cascading a coupler and a detector.

[0087] In the above embodiments, the first multiplexing unit 34 is a single coupler, such as in Figure 9 In the example below, a 1×4 coupler is used as the first multiplexer unit 34. The following section will also present how multiple couplers can be cascaded to obtain the first multiplexer unit 34, as shown in the example below. Figure 10 As shown, the first multiplexing unit 34 includes a first coupler 341, a second coupler 342, a third coupler 343, and a fourth coupler 344. And in Figure 10 The document also provides another implementation of the second detection component 6, which includes a second Raman detection component 61 and a second optical fiber detection component 62. The second Raman detection component 61 is connected between the third switching component 4 and the fourth switching component 8, and the second optical fiber detection component 62 is connected between the signal output terminal of the optical fiber amplification component 2 and the fourth switching component 8. Depending on the path connected by the third optical switching component, the optical power detected by the second Raman detection component 61 or the second optical fiber detection component 62 is used as the output signal power of the hybrid amplifier. Furthermore, an isolator is connected to the signal output terminal of the optical fiber amplification component 2.

[0088] Example 2:

[0089] This embodiment will be based on the implementation methods described in the embodiments, combined with specific application scenarios, and will use technical descriptions in related scenarios to illustrate the implementation process of the characteristics of the present invention in those scenarios. This embodiment takes the amplification of e-band signals as an example. The hybrid amplifier provided in this embodiment, such as... Figure 11 As shown, it includes:

[0090] 1310nm pump laser 1 (equivalent to the first polarization pump laser 310 in Example 1), 1310nm pump laser 2 (equivalent to the second polarization pump laser 311 in Example 1), 1340nm pump laser (equivalent to the second pump unit 32 in Example 1), 1360nm pump laser (equivalent to the third pump unit 36 ​​in Example 1), 1350nm coupler 1 (equivalent to the first wavelength division unit 33 in Example 1), 1350nm coupler 2 (equivalent to the second coupler 342 in Example 1), 1350nm coupler 3 (equivalent to the first coupler 341 in Example 1), 1350nm coupler 4 (equivalent to the second wavelength division unit 37 in Example 1), 1350nm IPBC1 (equivalent to the third coupler 343 in Example 1), 1350nm IPBC2 (equivalent to the multiplexer 312 in Example 1), 1310nm sparse wavelength division multiplexer (CoarseWavelength Division Multiplexer). Multiplex (abbreviated as CWDM) (equivalent to the fourth coupler 344 in Example 1), 1360 / 1380WDM1, 1360 / 1380 Wavelength Division Multiplexing (abbreviated as WDM)2, 1360 / 1380WDM3, 1350nm optical isolator 1 (equivalent to isolator 7 in Example 1), bismuth-doped fiber, 1350nm optical isolator 2, 1×2 optical switch (abbreviated as OSW)1 (equivalent to the third switch assembly 4 in Example 1), 1×2 OSW 2 (equivalent to the first switch assembly 35 in Example 1), 1×2 OSW 3 (equivalent to the second switch assembly 38 in Example 1), 1×2 OSW 4 (equivalent to the fourth switch assembly 8 in Example 1), beam splitter 1, beam splitter 2, beam splitter 3, photodetector (abbreviated as PD)1, PD2, PD3 and 100KM G652 fiber.

[0091] in, Figure 11 Each component is in Figure 10Based on this, the components are presented according to their corresponding names in actual application scenarios. When 1360 / 1380WDM1 is connected to 100KM G652 optical fiber, it is equivalent to Raman amplification component 1 in Example 1. When 1360 / 1380WDM2 and bismuth-doped optical fiber are connected to 1360 / 1380WDM3, they are equivalent to fiber amplification component 2 in Example 1. When beam splitter 1 is connected to PD1, it is equivalent to the second Raman detection component 61 in Example 1. When beam splitter 2 is connected to PD2, it is equivalent to the first detection component 5 in Example 1. When beam splitter 3 is connected to PD3, it is equivalent to the second fiber detection component 62 in Example 1.

[0092] In this embodiment, for the Raman amplifier section, 1310nm pump laser 1 and 1310nm pump laser 2 are arranged respectively, and 1350IPBC1 is used to combine the pump light P and S beams in two orthogonal directions into natural light, thereby reducing the polarization sensitivity in the Raman amplifier and increasing the saturation power of the Raman amplifier to a certain extent. Additionally, 1340nm and 1360nm pump lasers from a bismuth-doped fiber amplifier are arranged, and 1350IPBC2 is used to combine the pump light into natural light. Finally, 1310CWDM is used to further combine the output light of 1350IPBC1 and 1350IPBC2 to increase the pump power and expand the bandwidth of the Raman amplifier. The output light of the 1310CWDM then amplifies the opposing signal light passing through a 100km G652 fiber, and finally outputs after passing through 1×2OSW1, beam splitter 1, and 1×2OSW4.

[0093] This embodiment also addresses the bismuth-doped fiber amplifier section. At the input end, a beam splitter 2 and an optical isolator 1 are arranged to prevent the amplified spontaneous emission (ASE) inside the bismuth-doped fiber amplifier from affecting the input signal light. Simultaneously, beam splitter 2 and PD2 are used to monitor the power of the input signal light. A 1340nm pump laser is used for forward pumping of the bismuth-doped fiber in the optical path, and a 1360nm pump laser is used for backward pumping. An optical isolator 2 is placed before the output of the bismuth-doped fiber amplifier to prevent the reverse ASE at the output end from affecting the signal light. A beam splitter 3 is also arranged to monitor the power of the amplified output signal light. Finally, the amplified signal light is output after passing through a 1×2 OSW4.

[0094] It should be noted that, in order to save on pump usage costs and amplifier power consumption, 1340nm and 1360nm pump lasers can be used. These can be connected via 1×2OSW2, 1×2OSW3, and beam splitters 1 and 2 (1350nm coupler 1 and 1350nm coupler 2). Part of the laser is used to provide pump light to the bismuth-doped fiber in the optical path, while the other part is used for Raman amplification of the opposing signal light. Furthermore, to more accurately control the actual output power of the amplifier, the output power of each pump is precisely controlled by reporting from PD1, PD2, and PD3, and by adjusting 1×2OSW1, 1×2OSW2, and 1×2OSW3.

[0095] The IN input terminal receives the signal light, which passes through a 100KM G652 optical fiber and is then pumped by a 1310nm CWDM Raman pump light. The amplified signal light is then output after passing through a 1360 / 1380WDM1, a 1×2OSW1, a beam splitter 1, and a 1×2OSW4. The 1340nm and 1360nm pump lasers in the bismuth-doped fiber amplifier section are respectively coupled via 1×2OSW2, 1×2OSW3, 1350nm coupler 1, 1350nm coupler 2, 1350nm coupler 3, and 1350nm coupler 4. The resulting pump light energy is then combined via IPBC1 at 1350nm in the Raman fiber amplifier section. Additionally, 1310nm pump lasers 1 and 1310nm pump laser 2 are coupled via IPBC2 at 1350nm. The two different wavelengths of pump light are then combined again via a 1310nm CWDM, ultimately serving as the pump source for the Raman fiber amplifier. This amplifies the opposing input signal light at 1360 / 1380WDM1. The amplified signal light is then sequentially output via 1×2OSW1, beam splitter 1, and the common end of 1×2OSW4.

[0096] The signal light amplified by the Raman fiber amplifier is output from the other output end of the 1×2OSW1 and then used as the input of the bismuth-doped fiber amplifier again. The power of the secondary input light is then detected by the beam splitter 2, and subsequently passes through the optical isolator 1. The output end of the optical isolator 1 is connected to the signal input end of the 1360 / 1380WDM2. The pump end of the 1360 / 1380WDM2 is connected to the other end of the 1350nm coupler 1. The output end of the 1360 / 1380WDM2 is connected to the bismuth-doped fiber, and the other end of the bismuth-doped fiber is connected to the signal input end of the 1360 / 1380WDM3. Its pump end is connected to the other end of the 1350nm coupler 4 to form a co-pump. Finally, the second amplified signal output light is output after passing through the common end of the optical isolator 2, beam splitter 3, and 1×2OSW4. Here, beam splitter 3 and PD3 again detect the power of the output light. The 1×2OSW4 is used to selectively output the output light from the Raman fiber amplifier (i.e., the first signal in Example 1) or the output light after secondary amplification by the bismuth-doped fiber amplifier (i.e., the second signal in Example 1).

[0097] In this embodiment, the amplification of the e-band signal is achieved by using a Raman fiber amplifier and a bismuth-doped fiber amplifier in succession, and the pumping method is shared, ultimately realizing high-gain and low-noise output of the e-band signal light.

[0098] In this embodiment, 1340nm and 1360nm pump lasers were selected as pumps in the bismuth-doped fiber amplifier during the process of e-band signal amplification. At the same time, the co-directional pumping amplification method was used to increase the bandwidth of signal amplification and improve the amplification performance in the long-wavelength region of the e-band.

[0099] In this embodiment, during the amplification of the e-band signal, PD1 is set at the output end of the Raman fiber amplifier for beam splitting detection, and PD2 and PD3 are set at the input and output ends of the bismuth-doped fiber amplifier for beam splitting detection. This allows the selection of the paths of 1×2OSW1, 1×2OSW2, and 1×2OSW3 to be controlled based on the power reports from PD1, PD2, and PD3, thereby achieving reasonable control over the output power of the shared-pump 1340nm pump laser and the 1360nm pump laser. Simultaneously, the output power of the Raman fiber amplifier and the hybrid fiber amplifier can be precisely locked based on the power reports from PD1 and PD3.

[0100] The hybrid fiber amplifier device and implementation method provided in this embodiment enable the fiber amplifier to selectively perform high-gain amplification and low-gain amplification. Specifically, for low-gain amplification requirements, the output light from the Raman fiber amplifier can be output using a single 1×2OSW4; while for high-gain amplification requirements, the path selection of 1×2OSW1, 1×2OSW2, and 1×2OSW3 can be controlled based on the power reports from PD1, PD2, and PD3, combining the Raman fiber amplifier and the bismuth-doped fiber amplifier to amplify the signal light, which is then output again through the common terminal of the 1×2OSW4.

[0101] Example 3:

[0102] After providing the hybrid amplifiers described in Embodiments 1 and 2, this embodiment further provides a control method for the hybrid amplifier, the method comprising:

[0103] During low-gain amplification of the e-band signal light, based on the target gain, a low-gain amplification scenario is identified. Subsequently, 1×2OSW1 is switched to port 1, allowing the output signal light to pass through splitter 1 and 1×2OSW4 before being output. At this point, PD1 detects the signal light, and based on this result, it is determined that only the Raman fiber amplifier needs to operate. Simultaneously, 1×2OSW2 and 1×2OSW3 are both switched to port 1, ensuring that the pump light power from the 1340nm and 1360nm pump lasers is transmitted to both inputs of the 1350nm IPBC1. Furthermore, based on the power detected by PD1, the pump drive circuit is controlled to adjust the operating current of the 1310nm, 1310nm, 1340nm, and 1360nm pump lasers, thereby achieving rapid locking of the output light power at the OUT port in the low-gain amplification scenario.

[0104] During low-gain amplification of the e-band signal light, based on the target gain, a high-gain amplification scenario is determined. Subsequently, 1×2OSW1 is switched to port 0. The output light from the Raman amplifier is detected by PD2 after passing through beam splitter 2. Based on this result, it is determined that the Raman fiber amplifier and the bismuth-doped fiber amplifier need to work together. Simultaneously, 1×2OSW2 and 1×2OSW3 are both switched to port 0 to achieve shared pump power from the 1340nm and 1360nm pump lasers. Furthermore, feedback control of the pump drive circuit based on the PD3 detected power adjusts the operating current of the 1310nm, 1310nm, 1340nm, and 1360nm pump lasers, thereby achieving rapid locking of the OUT port output power in the high-gain amplification scenario.

[0105] During the amplification of e-band signal light, the operating current ratios of the 1310nm pump laser 1, 1310nm pump laser 2, 1340nm pump laser, and 1360nm pump laser in the hybrid fiber amplifier device can be calibrated in advance to meet the needs of single-wavelength scenarios, multi-wavelength scenarios with different bandwidths, and high and low gain amplification scenarios.

[0106] All the methods described in this embodiment can be implemented by setting a microprocessor (Microcontroller Unit, abbreviated as MCU) in the hybrid amplifier, and the MCU executes the above methods.

[0107] It is worth noting that the information interaction and execution process between the modules and units in the above-mentioned device and system are based on the same concept as the processing method embodiment of the present invention. For details, please refer to the description in the method embodiment of the present invention, and will not be repeated here.

[0108] Those skilled in the art will understand that all or part of the steps in the various methods of the embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, which may include: read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, etc.

[0109] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hybrid amplifier, characterized in that, It includes a Raman amplification component (1), an optical fiber amplification component (2), and a pump component (3). The first output terminal of the pump component (3) is connected to the pump input terminal of the Raman amplification component (1), the second output terminal of the pump component (3) is connected to the pump input terminal of the fiber amplification component (2), and the signal output terminal of the Raman amplification component (1) is connected to the signal input terminal of the fiber amplification component (2). The pump component (3) is used to generate a first pump light and a second pump light, transmit the first pump light to the Raman amplification component (1), and transmit the second pump light to the fiber amplification component (2). The Raman amplification component (1) is used to amplify the input signal once using the first pump light to obtain a first signal; the fiber amplification component (2) is used to amplify the first signal a second time using the second pump light to obtain a second signal. The pump assembly (3) includes a first pump unit (31) for generating a first basic pump light, a second pump unit (32) for generating a second basic pump light, a first wavelength division unit (33), a first wavelength combination unit (34), and a first switch assembly (35); the input terminal of the first switch assembly (35) is connected to the output terminal of the second pump unit (32), one output terminal of the first switch assembly (35) is connected to the input terminal of the first wavelength division unit (33), and the other output terminal of the first switch assembly (35) is connected to the second input terminal of the first wavelength combination unit (34); one output terminal of the first wavelength division unit (33) is connected to the pump input terminal of the fiber amplification assembly (2), and the other output terminal of the first wavelength division unit (33) is connected to the second input terminal of the first wavelength combination unit (34); the output terminal of the first pump unit (31) is connected to the first input terminal of the first wavelength combination unit (34); and the output terminal of the first wavelength combination unit (34) is connected to the pump input terminal of the Raman amplification assembly (1). The first wavelength division unit (33) is used to split the second basic pump light to obtain the first intermediate pump light and the second intermediate pump light transmitted to the first wavelength combination unit (34), and transmit the first intermediate pump light as the second pump light to the fiber amplification component (2). The first switching component (35) is used to selectively transmit the second basic pump light to the first wavelength division unit (33), so that the second intermediate pump light is combined with the light from other input terminals of the first wavelength division unit (34) to obtain the first pump light; or, transmit the second basic pump light to the first wavelength division unit (34), so that the second basic pump light is combined with the light from other input terminals of the first wavelength division unit (34) to obtain the first pump light.

2. The hybrid amplifier according to claim 1, characterized in that, The first pump unit (31) includes a first polarization pump laser (310), a second polarization pump laser (311), and a combiner (312). The output terminals of the first polarization pump laser (310) and the second polarization pump laser (311) are respectively connected to the two input terminals of the combiner (312), and the output terminal of the combiner (312) is connected to the first input terminal of the first combiner unit (34). The first polarization pump laser (310) is used to generate pump light in a first polarization direction, the second polarization pump laser (311) is used to generate pump light in a second polarization direction, and the combiner (312) is used to combine the pump light in the first polarization direction and the pump light in the second polarization direction to obtain the first basic pump light.

3. The hybrid amplifier according to claim 1, characterized in that, The pump assembly (3) also includes a third pump unit (36) and a second wave splitter unit (37). The output of the third pump unit (36) is connected to the input of the second wave splitter unit (37), one output of the second wave splitter unit (37) is connected to the other pump input of the fiber amplifier assembly (2), and the other output of the second wave splitter unit (37) is connected to the third input of the first wave combiner unit (34). The third pump unit (36) is used to generate the third basic pump light, and the second wavelength division unit (37) is used to split the third basic pump light into the third intermediate pump light and the fourth intermediate pump light, and transmit the third intermediate pump light as the third pump light to the fiber amplification component (2) so that the fiber amplification component (2) can use the second pump light and the third pump light to amplify the first signal a second time. The fourth intermediate pump light is transmitted to the first multiplexing unit (34), which is used to combine the fourth intermediate pump light with light from other input terminals of the first multiplexing unit (34) to obtain the first pump light, and transmit the first pump light to the Raman amplification component (1).

4. The hybrid amplifier according to claim 3, characterized in that, The pump assembly (3) also includes a second switching assembly (38); The input terminal of the second switching assembly (38) is connected to the output terminal of the third pump unit (36), one output terminal of the second switching assembly (38) is connected to the input terminal of the second demultiplexing unit (37), and the other output terminal of the second switching assembly (38) is connected to the third input terminal of the first multiplexing unit (34). The second switching assembly (38) is used to selectively transmit the third basic pump light to the second wavelength division unit (37), so that the fourth intermediate pump light is combined with the light from other inputs of the first wavelength division unit (34) to obtain the first pump light; or, transmit the third basic pump light to the first wavelength division unit (34), so that the third basic pump light is combined with the light from other inputs of the first wavelength division unit (34) to obtain the first pump light.

5. The hybrid amplifier according to any one of claims 1-4, characterized in that, The hybrid amplifier also includes a third switching component (4); The input terminal of the third switching component (4) is connected to the signal output terminal of the Raman amplification component (1), one output terminal of the third switching component (4) is connected to the signal output terminal of the hybrid amplifier, and the other output terminal of the third switching component (4) is connected to the signal input terminal of the fiber amplification component (2). The third switching component (4) is used to selectively transmit the first signal to the fiber optic amplifier component (2) so that the fiber optic amplifier component (2) can amplify the first signal a second time to obtain the second signal; or, transmit the first signal to the signal output terminal of the hybrid amplifier for output.

6. The hybrid amplifier according to any one of claims 1-4, characterized in that, A first detection component (5) is connected between the output end of the Raman amplification component (1) and the input end of the fiber amplification component (2), and a second detection component (6) is connected to the output end of the hybrid amplifier. The first detection component (5) is used to detect the power of the first signal, and the second detection component (6) is used to detect the power of the output signal of the hybrid amplifier.

7. The hybrid amplifier according to any one of claims 1-4, characterized in that, An isolator (7) is also connected between the output end of the Raman amplification component (1) and the input end of the fiber amplification component (2).

8. The hybrid amplifier according to any one of claims 1-4, characterized in that, The transmission direction of the first pump light in the Raman amplification component (1) is opposite to the transmission direction of the input signal in the Raman amplification component (1) to achieve backward Raman amplification.

Images