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Feedback filtering optical path for enhancing optical fiber amplifier output

A fiber amplifier and feedback filtering technology, applied in optics, instruments, nonlinear optics, etc., can solve the problems of wasting pump light energy, the pump light energy cannot be further improved, and the amplifier energy utilization rate cannot be effectively improved, so as to reduce the Signal light stray light, superior performance, and the effect of improving absorption utilization

Inactive Publication Date: 2014-07-23
江苏西贝电子网络有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, when the erbium-ytterbium co-doped fiber amplifies the seed light, the self-excited radiation of ytterbium ions will increase rapidly as the intensity of the pump light increases. On the one hand, this self-excited radiation wastes the energy of the pump light, making The energy utilization rate of the amplifier cannot be effectively improved. On the other hand, the energy of the pump light cannot be further improved due to pollution of the signal light and thermal effects, which largely limits the maximum output power of the amplifier. This method reduces the self-excited radiation intensity of ytterbium ions, reduces the light energy lost due to the self-excited radiation of ytterbium ions, will improve the energy utilization rate of erbium-ytterbium optical fibers, and further, can also increase the maximum output power of amplifiers or lasers , so that it can exert more excellent performance in optical fiber communication or laser application

Method used

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  • Feedback filtering optical path for enhancing optical fiber amplifier output
  • Feedback filtering optical path for enhancing optical fiber amplifier output
  • Feedback filtering optical path for enhancing optical fiber amplifier output

Examples

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no. 1 example

[0016] Such as figure 1 As shown, the present invention includes the basic amplifying optical circuit 1 and the feedback filter circuit 2 of the erbium-ytterbium fiber amplifier, and the basic amplifying optical circuit 1 of the erbium-ytterbium fiber amplifier includes a signal light source 3, a first isolator 4, a pump optical filter 5, an erbium-ytterbium optical fiber amplifier Double-clad gain fiber 6, pump optical coupler 7, pump light source 8, and second isolator 9; the first isolator 4 is connected to the signal light source 3, and the signal light source 3 is used to generate 1550 nm band signal light for exciting the erbium-ytterbium fiber The seed light; the output end of the first isolator 4 is connected with one end of the pumping optical filter 5, and the other end of the pumping optical filter 5 is connected with one end of the erbium-ytterbium double-clad gain fiber 6, and the erbium-ytterbium double-clad The other end of the gain fiber 6 is connected to the b...

no. 2 example

[0021] Such as figure 2 As shown, the structure of embodiment 2 is basically the same as that of embodiment 1, the difference is that an output is connected in series between the 1040 nm signal input end of the first wavelength division multiplexer 13 of embodiment 1 and the adjustable filter 15 Coupler 14. In order to monitor the intensity of the 1040 nm signal light in the circuit, after the 1040 nm light is exported to the first wavelength division multiplexer 13, a part of the light in the circuit is exported through the output coupler 14, so that the light intensity in the circuit can be observed in real time.

no. 3 example

[0023] Such as image 3 As shown, the structure of embodiment 3 is basically the same as that of embodiment 1, the difference is that a light Attenuator 17. In order to control the intensity of the 1040 nm light in the loop, an optical attenuator 17 is added during the transmission of the 1040 nm light from the tunable filter 18 to the second wavelength division multiplexer 16, so as to control the intensity of the 1040 nm light to make it The best results can be achieved under different conditions.

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Abstract

The invention discloses a feedback filtering optical path for enhancing optical fiber amplifier output and relates to the field of optical fiber amplification. The feedback filtering optical path for enhancing the optical fiber amplifier output comprises a signal light source, a first isolator, a first wavelength division multiplexer, a second wavelength division multiplexer, an adjustable filter, a pump light filter, an Er-Yb double-cladding gain optical fiber, a pump light coupler, a pump light source and a second isolator, wherein the first wavelength division multiplexer is connected between the first isolator and a pump light leakage detector in series, the second wavelength division multiplexer is connected between the signal output end of the pump light coupler and the second isolator in series, and the adjustable filter is connected between the first wavelength division multiplexer and the second wavelength division multiplexer in series. By the adoption of the feedback filtering optical path for enhancing the optical fiber amplifier output, the pump light intensity of an ordinary Er-Yb gain optical fiber can be increased by 15%, the quality of finally output signals will not be decreased, the intensity of finally output amplified signals can be improved by 20% on the original basis, and thus the performance of the Er-Yb optical fiber is more excellent.

Description

technical field [0001] The invention relates to the field of optical fiber amplification, in particular to a feedback filter optical path for enhancing the output of an optical fiber amplifier. Background technique [0002] Erbium-ytterbium co-doped double-clad fiber amplifiers are widely used in the field of optical fiber communication, including prevention before long-distance optical fiber transmission, relay amplification during transmission, and optical signal shunt amplification when solving the problem of optical fiber entering the home. Since signal light with a center wavelength of 1550 nm is widely used in the communication process, only erbium ions have a matching energy level structure in rare earths. Ytterbium ions, in this way, after absorbing the pump light through the ytterbium ions, the energy is transferred to the erbium ions to finally achieve a better amplification effect on the 1550 nm signal light. Similarly, applying the same principle to a laser ...

Claims

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Application Information

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IPC IPC(8): H01S3/067G02F1/39
Inventor 宋峰冯鸣贾文章张卫国张洪泉陈侃松
Owner 江苏西贝电子网络有限公司