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CN-121984593-A - L-band ultra-wideband high-power optical fiber amplifier and optical module for inhibiting laser

CN121984593ACN 121984593 ACN121984593 ACN 121984593ACN-121984593-A

Abstract

The invention provides an L-band ultra-wideband high-power optical fiber amplifier for inhibiting laser and an optical module, which comprise a plurality of amplifying light paths, a first wavelength division multiplexer and a first inclined plane contact pin, wherein the amplifying light paths are sequentially cascaded, the first wavelength division multiplexer is arranged between two adjacent amplifying light paths, the public end of the first wavelength division multiplexer is connected with the output end of the amplifying light path of the previous stage, the transmission end of the first wavelength division multiplexer is connected with the input end of the amplifying light path of the next stage, the first inclined plane contact pin is connected with the reflection end of the first wavelength division multiplexer, the first wavelength division multiplexer is used for transmitting ASE light in the amplifying light path to the first inclined plane contact pin, the first inclined plane contact pin is used for attenuating ASE light received in the amplifying light path, the ASE light is attenuated in the amplifying light path, the condition that ASE light is inhibited in the light path is relieved, the transmission performance of the amplifying light path is improved, the condition that ASE light is subjected to laser is damaged is relieved, and the probability of the laser light path is reduced.

Inventors

  • LEI RUI
  • TAO JINTAO
  • FU ZIWEN
  • FU CHENGPENG
  • FANG DI

Assignees

  • 武汉光迅科技股份有限公司

Dates

Publication Date
20260505
Application Date
20260105

Claims (10)

  1. 1. The L-band ultra-wideband high-power optical fiber amplifier for inhibiting laser is characterized by comprising a plurality of amplifying light paths (1), a plurality of first wavelength division multiplexers (2) and a plurality of first inclined plane pins (3), wherein: the amplifying light paths (1) are sequentially cascaded; the optical fiber amplification device comprises a first wavelength division multiplexer (2) arranged between two adjacent amplification optical paths (1), wherein the public end of the first wavelength division multiplexer (2) is connected with the output end of a previous stage amplification optical path (1), and the transmission end of the first wavelength division multiplexer (2) is connected with the input end of a subsequent stage amplification optical path (1); The first wavelength division multiplexer (2) is used for transmitting ASE light in the amplifying light path (1) to the first inclined plane pin (3), and the first inclined plane pin (3) is used for attenuating received ASE light.
  2. 2. The lassified L-band ultra wideband high power fiber amplifier of claim 1, further comprising a first optical splitter (4) and a first detector (5), wherein: The public end of the first optical splitter (4) is connected with the reflecting end of the first wavelength division multiplexer (2), the first optical splitter end of the first optical splitter (4) is connected with the first inclined plane contact pin (3), and the second optical splitter end of the first optical splitter (4) is connected with the first detector (5); the first optical splitter (4) is used for splitting ASE light from the first wavelength division multiplexer (2) according to a preset proportion, the ASE light of a first preset proportion is split to the first inclined plane contact pin (3) and is attenuated by the first inclined plane contact pin (3), the ASE light of a second preset proportion is split to the first detector (5), the first detector (5) is used for monitoring the optical power of the ASE light of the second preset proportion, and when the optical power of the ASE light of the second preset proportion is larger than a first preset threshold value, an alarm is given out, so that the occurrence of the laser is judged.
  3. 3. The lasing-suppressing L-band ultra wideband high power optical fiber amplifier of claim 1, further comprising a first isolator (6), wherein: The input end of the first isolator (6) is connected with the input end of the first-stage amplifying light path (1); the first isolator (6) is used for attenuating reverse ASE light from the first-stage amplification optical path (1).
  4. 4. The L-band ultra wideband high power fiber amplifier with lasing suppression according to claim 1, wherein the amplifying optical path (1) is a first amplifying optical path (11) or a second amplifying optical path (12), wherein: the first amplifying optical path (11) and the second amplifying optical path (12) are alternately cascaded.
  5. 5. The L-band ultra wideband high power fiber amplifier with lasing suppression as claimed in claim 4, wherein said second amplification optical path (12) specifically comprises 940 pump laser (121), third wavelength division multiplexer (122) and first erbium ytterbium fiber (123), wherein: The signal end of the third wavelength division multiplexer (122) is connected with the output end of the first amplifying optical path (11) of the previous stage, the pumping end of the third wavelength division multiplexer (122) is connected with the 940 pumping laser (121), the public end of the third wavelength division multiplexer (122) is connected with the input end of the first erbium ytterbium optical fiber (123), and the output end of the first erbium ytterbium optical fiber (123) is connected with the input end of the first amplifying optical path (11) of the next stage.
  6. 6. The lased L-band ultra wideband high power fiber amplifier of claim 5, wherein said second amplification optical path (12) further comprises a third isolator (124) and a second filter (125), wherein: The input end of the second filter (125) is connected with the output end of the first erbium ytterbium optical fiber (123), the output end of the second filter (125) is connected with the input end of the third isolator (124), and the output end of the third isolator (124) is connected with the input end of the first amplifying optical path (11) of the next stage; The third isolator (124) is used for attenuating forward ASE light from the first erbium ytterbium optical fiber (123) of the current stage, the third isolator (124) is also used for attenuating reverse ASE light from the first amplifying optical path (11) of the next stage, and the second filter (125) is used for attenuating forward ASE light from the first erbium ytterbium optical fiber (123).
  7. 7. The L-band ultra wideband high power fiber amplifier with lasing suppression as claimed in claim 4, wherein said first amplification optical path (11) specifically comprises a 980 pump laser (111), a second wavelength division multiplexer (112) and a first erbium doped fiber (113), wherein: The signal end of the second wavelength division multiplexer (112) is connected with the output end of the first stage second amplifying optical path (12), the pumping end of the second wavelength division multiplexer (112) is connected with the 980 pumping laser (111), the public end of the second wavelength division multiplexer (112) is connected with the input end of the first erbium-doped optical fiber (113), and the output end of the first erbium-doped optical fiber (113) is connected with the input end of the second amplifying optical path (12) of the subsequent stage.
  8. 8. The lased L-band ultra wideband high power fiber amplifier of claim 7, further comprising a second isolator (114) in said first amplification path (11), wherein: the input end of the second isolator (114) is connected with the first erbium-doped fiber (113), and the output end of the second isolator (114) is connected with the input end of the next-stage amplifying optical path (1); The second isolator (114) is used for attenuating forward ASE light from the first erbium-doped fiber (113) of the current stage, and the second isolator (114) is also used for attenuating reverse ASE light from the amplifying optical path (1) of the next stage.
  9. 9. The lased L-band ultra wideband high power fiber amplifier of claim 8, wherein said first amplifying optical path (11) further comprises a first filter (115), wherein: The input end of the first filter (115) is connected with the output end of the first erbium-doped fiber (113), and the output end of the first filter (115) is connected with the input end of the second isolator (114); the first filter (115) is configured to attenuate forward ASE light from the first erbium doped fiber (113).
  10. 10. An optical module comprising an L-band ultra wideband high power fiber amplifier for suppressing lasing as claimed in any of claims 1-9.

Description

L-band ultra-wideband high-power optical fiber amplifier and optical module for inhibiting laser Technical Field The invention relates to the technical field of optical communication, in particular to an L-band ultra-wideband high-power optical fiber amplifier and an optical module for inhibiting laser. Background In the prior art, the L-band ultra-wideband amplifier is mainly applied to a 400G backbone network, and the 400G backbone network in China adopts a signal bandwidth based on 150G wavelength interval at present. In practical application, when L-wave Duan Xinhao light passes through the gain fiber, C-band amplified spontaneous emission (AMPLIFIED SPONTANEOUS EMISSION ‌, abbreviated as ASE) light is generated, the C-band ASE light competes with original signal light transmitted in the amplifying light path, the C-band ASE light inhibits the original signal light, so that the transmission performance of the amplifying light path is influenced, devices in the amplifying light path are complex, a plurality of resonant cavities are easy to form, the C-band ASE light is easy to generate laser in the amplifying light path, and once the laser is formed, the amplifying light path is damaged. In view of this, overcoming the drawbacks of the prior art is a problem to be solved in the art. Disclosure of Invention The invention aims to solve the technical problems of improving the transmission performance of signal light in an amplifying light path and reducing the probability of occurrence of laser in the amplifying light path. The invention provides an L-band ultra-wideband high-power optical fiber amplifier for inhibiting laser, which comprises a plurality of amplifying light paths 1, a plurality of first wavelength division multiplexers 2 and a plurality of first inclined plane pins 3, wherein: the amplifying light paths 1 are sequentially cascaded; The two adjacent amplifying light paths 1 are provided with a first wavelength division multiplexer 2, the public end of the first wavelength division multiplexer 2 is connected with the output end of the amplifying light path 1 of the previous stage, and the transmission end of the first wavelength division multiplexer 2 is connected with the input end of the amplifying light path 1 of the next stage; the first inclined plane contact pin 3 is connected with the reflecting end of the first wavelength division multiplexer 2; The first wavelength division multiplexer 2 is configured to transmit ASE light in the amplifying optical path 1 to the first inclined plane pin 3, and the first inclined plane pin 3 is configured to attenuate the received ASE light. Preferably, the L-band ultra-wideband high-power optical fiber amplifier for suppressing lasing further comprises a first optical splitter 4 and a first detector 5, wherein: the public end of the first optical splitter 4 is connected with the reflecting end of the first wavelength division multiplexer 2, the first optical splitter 4 is connected with the first inclined plane contact pin 3, and the second optical splitter 4 is connected with the first detector 5; The first optical splitter 4 is configured to split ASE light from the first wavelength division multiplexer 2 according to a preset ratio, where the ASE light of the first preset ratio is split to the first inclined plane pin 3 and attenuated by the first inclined plane pin 3, the ASE light of the second preset ratio is split to the first detector 5, and the first detector 5 is configured to monitor the optical power of the ASE light of the second preset ratio, and alarm when the optical power of the ASE light of the second preset ratio is greater than a first preset threshold, so as to determine that lasing occurs. Preferably, the L-band ultra-wideband high power fiber amplifier for suppressing lasing further comprises a first isolator 6, wherein: The input end of the first isolator 6 is connected with the input end of the first-stage amplifying optical path 1; The first isolator 6 is used for attenuating reverse ASE light from the first-stage amplification optical path 1. Preferably, the amplifying optical path 1 is a first amplifying optical path 11 or a second amplifying optical path 12, where: The first amplifying optical path 11 and the second amplifying optical path 12 are alternately cascaded. Preferably, the second amplifying optical path 12 specifically includes 940 a pump laser 121, a third wavelength division multiplexer 122, and a first erbium ytterbium fiber 123, where: The signal end of the third wavelength division multiplexer 122 is connected to the output end of the first amplifying optical path 11 of the previous stage, the pump end of the third wavelength division multiplexer 122 is connected to the 940 pump laser 121, the common end of the third wavelength division multiplexer 122 is connected to the input end of the first erbium ytterbium optical fiber 123, and the output end of the first erbium ytterbium optical fiber 123 is connect