4*4 pumping backup light amplification device

Abstract

The invention relates to the technical field of light amplification devices, in particular to a 4 * 4 pump backup light amplification device which comprises a pump laser, a polarization beam combiner, an optical fiber coupler, a light amplification light path and a driving circuit. The pump laser comprises two laser chips and can output two paths of polarization-maintaining pump light, the two paths of polarization-maintaining pump light are combined into one beam through a polarization beam combiner with an isolation function, and the four paths of pump light enter a 4 * 4 optical fiber coupler after being subjected to the same operation and finally enter four optical amplifier optical paths. The light amplification device adopts the pump laser comprising two laser chips to perform polarization beam combination, so that the output power of the laser can be doubled, the occupied volume of the laser is not changed, and the reliability of the whole device is the same as that of a common 4 * 4 pump backup light amplification device; the problem that the conventional 4 * 4 pumping backup cannot meet higher power output is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of optical amplifier devices, and in particular to an optical amplifier device with 4×4 pump backup. Background Art

[0002] Fiber optic amplifier is a commonly used fiber optic transmission device that can extend the transmission distance of optical signals, especially used in submarine optical cable systems.

[0003] Due to the development of ultra-high-speed, large-capacity optical transmission, conventional 4×4 pump backup cannot meet the goal of high-power output. If a higher-power pump is directly used, its power consumption will increase and reliability will decrease. Summary of the invention

[0004] The object of the present invention is to provide a 4×4 pump backup optical amplifier device, aiming to solve the problem that the conventional 4×4 pump backup cannot meet the requirements of a higher power output.

[0005] To achieve the above-mentioned object, the present invention provides a 4×4 pump backup optical amplifier device, comprising a pump laser, a polarization beam combiner, a fiber coupler, an optical amplifier optical path and a driving circuit; the driving circuit is connected to the pump laser, and the pump laser, the polarization beam combiner, the fiber coupler and the optical amplifier optical path are connected in sequence.

[0006] The pump laser has an operating wavelength of 980nm±10nm, a dual-chip structure, an output power of ≥500mW, and two output pigtails, which are polarization-maintaining optical fibers.

[0007] The polarization beam combiner is a 3-port structure with an operating wavelength of 980nm±20nm, its two input optical fibers are polarization-maintaining optical fibers, and the output optical fiber is a single-mode optical fiber.

[0008] The optical fiber coupler is a 4×4 optical fiber coupler, the operating wavelength is 980nm±20nm, the input optical fiber and the output optical fiber are single-mode optical fibers, and the additional loss is ≤0.4dB.

[0009] The optical amplifier optical path has components of the optical amplifier optical path, including an optical fiber isolator, a wavelength division multiplexer, an erbium-doped optical fiber and a gain flattening filter, and its input optical fiber and output optical fiber are both single-mode optical fibers.

[0010] A 4×4 pump backup optical amplifier device of the present invention,

[0011] The device comprises 4 pump lasers, 4 polarization beam combiners, 1 fiber coupler, 4 optical amplifier optical paths and the driving circuit. Each pump laser (LD) contains 2 laser chips, which can output 2 polarization-maintaining pump lights. The 2 polarization-maintaining pump lights are combined into one beam through the polarization beam combiner (IPBC) with isolation function. The 4 pumps are operated in the same way and then enter a 4×4 fiber coupler, and finally enter the 4 optical amplifier optical paths. The optical amplifier device uses the pump laser containing 2 laser chips for polarization beam combining, which can double the output power of the laser, while the volume occupied by the laser remains unchanged. The reliability of the entire device is the same as that of the ordinary 4×4 pump backup optical amplifier device, which solves the problem that the conventional 4×4 pump backup cannot meet the higher power output. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 The invention provides a 4×4 pump backup optical amplifier device.

[0014] In the figure: 1- pump laser, 2- polarization beam combiner, 3- fiber coupler, 4- optical amplifier optical path, 5- driving circuit. DETAILED DESCRIPTION

[0015] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0016] See also Figure 1 The present invention provides a 4×4 pump backup optical amplifier device, comprising a pump laser 1, a polarization beam combiner 2, a fiber coupler 3, an optical amplifier optical path 4 and a driving circuit 5; the driving circuit 5 is connected to the pump laser 1, and the pump laser 1, the polarization beam combiner 2, the fiber coupler 3 and the optical amplifier optical path 4 are connected in sequence.

[0017] In the embodiment of the present invention, each of the pump lasers 1 (LD) contains two laser chips, which can output two polarization-maintaining pump lights. The two polarization-maintaining pump lights are combined into one beam through the polarization beam combiner 2 (IPBC) with isolation function. The four pumps undergo the same operation and then enter a 4×4 fiber coupler 3, and finally enter the four optical amplifier optical paths. The optical amplifier device uses the pump laser 1 containing two laser chips for polarization beam combining, which can double the output power of the laser, while the volume occupied by the laser remains unchanged. The reliability of the entire device is the same as that of an ordinary 4×4 pump backup optical amplifier device, which solves the problem that the conventional 4×4 pump backup cannot meet the higher power output.

[0018] Furthermore, the pump laser 1 has an operating wavelength of 980 nm ± 10 nm, has a dual-chip structure, and an output power of ≥ 500 mW. The number of output pigtails is 2, which are polarization-maintaining fibers.

[0019] In the embodiment of the present invention, the pump laser 1 (LD1~LD4) has an operating wavelength of 980nm±10nm, a dual-chip structure, and an output power ≥500mW. The pump laser 1 is packaged in a 10PIN butterfly package or a 14PIN butterfly package. The cooling method can be a cooling type or a non-cooling type according to actual conditions. The submarine cable system generally adopts a non-cooling type to reduce power consumption, and the output pigtail adopts a polarization-maintaining fiber.

[0020] Furthermore, the polarization beam combiner 2 (IPBC1-IPBC4) is a 3-port structure (1×2), the operating wavelength is 980nm±20nm, its two input optical fibers are polarization-maintaining optical fibers, and the output optical fiber is a single-mode optical fiber.

[0021] Furthermore, the optical fiber coupler 3 (COUPLER) is a 4×4 optical fiber coupler 3, the operating wavelength is 980nm±20nm, the input optical fiber and the output optical fiber are single-mode optical fibers, and the additional loss is ≤0.4dB.

[0022] In the embodiment of the present invention, the optical fiber coupler 3 may also be composed of four 2×2 optical fiber couplers.

[0023] Furthermore, the optical amplifier optical path 4 (EDFA_1 to EDFA_4) has components of the optical amplifier optical path, including an optical fiber isolator, a wavelength division multiplexer, an erbium-doped optical fiber and a gain flattening filter, and its input optical fiber and output optical fiber are both single-mode optical fibers.

[0024] Furthermore, the driving circuit 5 is used to drive the pump laser 1, and the pump laser 1 can work normally.

[0025] The above disclosure is only a preferred embodiment of a 4×4 pump backup optical amplifier device of the present invention. Of course, it cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A 4×4 pump backup optical amplifier device, characterized in that ； It includes pump laser, polarization beam combiner, fiber coupler, optical amplifier optical path and driving circuit; The driving circuit is connected to the pump laser, and the pump laser, the polarization beam combiner, the optical fiber coupler and the optical amplification optical path are connected in sequence.

2. The 4×4 pump backup optical amplifier device as claimed in claim 1, characterized in that ； The pump laser has an operating wavelength of 980nm±10nm, has a dual-chip structure, and an output power of ≥500mW. The number of output pigtails is 2, which are polarization-maintaining optical fibers.

3. The 4×4 pump backup optical amplifier device according to claim 1, characterized in that; The polarization beam combiner is a 3-port structure with an operating wavelength of 980nm±20nm. Its two input optical fibers are polarization-maintaining optical fibers, and its output optical fiber is a single-mode optical fiber.

4. The 4×4 pump backup optical amplifier device as claimed in claim 1, It is characterized by: The optical fiber coupler is a 4×4 optical fiber coupler, the working wavelength is 980nm±20nm, the input optical fiber and the output optical fiber are single-mode optical fibers, and the additional loss is ≤0.4dB.

5. The 4×4 pump backup optical amplifier device as claimed in claim 1, It is characterized by: The optical amplifier optical path has components of the optical amplifier optical path, including an optical fiber isolator, a wavelength division multiplexer, an erbium-doped optical fiber and a gain flattening filter, and its input optical fiber and output optical fiber are both single-mode optical fibers.

Images