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Er-doped optical fiber source and near-Gaussian spectrum output generating method thereof

An erbium-doped fiber and light source technology, applied in lasers, laser parts, structures/shapes of active media, etc., to achieve the effects of easy optimization design, large output spectral width, and simple and flexible implementation schemes

Inactive Publication Date: 2014-12-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to address the problem of the spectral output of the existing erbium-doped fiber source for fiber optic gyroscopes, to propose a method for producing an erbium-doped fiber source and its near-Gaussian spectrum output, based on the gain modulation technology of cascade filtering, in obtaining Near-Gaussian spectrum output can have high output power and large spectral width at the same time

Method used

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  • Er-doped optical fiber source and near-Gaussian spectrum output generating method thereof
  • Er-doped optical fiber source and near-Gaussian spectrum output generating method thereof
  • Er-doped optical fiber source and near-Gaussian spectrum output generating method thereof

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Embodiment 1

[0029] Such as figure 2 As shown, the present invention is used for a single-pass backward 4-stage cascaded filter structure erbium-doped fiber light source, including a pump laser light source 1, a wavelength division multiplexer 2, four sections of erbium-doped fiber 3, three filters 4 and an optical isolator 5; the pump laser light source 1 is connected to the A terminal of the wavelength division multiplexer 2, the optical isolator 5 is connected to the C terminal of the wavelength division multiplexer 2, and the B terminal of the wavelength division multiplexer 2 is connected to four sections of erbium-doped in turn The optical fiber 3 is connected with a filter 4 between each section of the erbium-doped optical fiber 3 .

[0030] The pumping laser light source 1 is a semiconductor laser (LD) with a wavelength of 980nm.

[0031] The core radius of the four sections of erbium-doped optical fiber 3 is 1.47 μm, the numerical aperture is 0.232, and the length is 5 m.

[00...

Embodiment 2

[0036] Such as image 3 As shown, the present invention is used for two-way backward four-stage cascaded filter structure erbium-doped fiber light source, including pumping laser light source 1, wavelength division multiplexer 2, four sections of erbium-doped fiber 3, three filters 4, optical Isolator 5, reflector 6; Pu laser light source 1 is connected with terminal A of wavelength division multiplexer 2, optical isolator 5 is connected with terminal C of wavelength division multiplexer 2, and terminal B of wavelength division multiplexer 2 is sequentially Connect four sections of erbium-doped optical fiber 3, each section of erbium-doped optical fiber 3 is connected with a filter 4, and the end of the fourth erbium-doped optical fiber 3 is connected with the reflector 6; the C end of the wavelength division multiplexer 2 is also provided with an optical isolation device 5.

[0037] The pumping laser light source 1 is a semiconductor laser (LD) with a wavelength of 980nm.

...

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Abstract

The invention discloses an er-doped optical fiber source and a near-Gaussian spectrum output generating method thereof. The method is specifically as follows: an er-doped optical fiber is divided into a plurality of sections and filters are connected between the sections of er-doped optical fibers; a pumping laser source, the wavelength of which is 980nm, is used to pump all the er-doped optical fibers; the filters filter 1530nm-waveband seed light generated by the sections of optical fibers and the 1530nm-waveband seed light is restricted from entering a next section of er-doped optical fiber for stimulated radiation amplification; and at last, near-Gaussian spectra, the average wavelength of which is 1550 wavebands, are output. Based on a gain modulation technology of cascade filtering, the er-doped optical fiber source obtains near-Gaussian spectrum output, and can also have higher output power and larger spectrum width at the same time.

Description

technical field [0001] The invention belongs to the field of fiber optic gyroscope applications, in particular to an erbium-doped fiber optic light source and a method for generating near-Gaussian spectrum output. Background technique [0002] Currently, the optical fiber gyroscope light source used in low-to-medium precision is mainly SLD. The SLD light source has the advantages of small size, wide spectrum, and near-Gaussian spectral output. However, SLD also has obvious shortcomings such as limited output power and average wavelength sensitivity to temperature. place. The stability of the scale factor of the high-precision inertial navigation grade fiber optic gyroscope requires the average wavelength stability of the light source to be less than 1ppm. SLD is difficult to meet the requirements, and the erbium-doped fiber optic light source has high average wavelength stability, making it a high-precision fiber optic gyroscope application. preferred light source. Erbium-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/13H01S3/067
Inventor 贺青黄腾超洪波庞斌车双良舒晓武刘承
Owner ZHEJIANG UNIV
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