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Wavelength-tunable single-polarization single-frequency ring-cavity optical fiber laser

A fiber laser, single polarization technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of non-single polarization state, multi-longitudinal mode oscillation of fiber lasers, etc., and achieve the effect of strong practicability

Active Publication Date: 2017-08-08
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the problems of multi-longitudinal mode oscillation and non-single polarization state output of the fiber laser in the background technology, and provide a wavelength-tunable single-polarization single-frequency ring-cavity fiber laser

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  • Wavelength-tunable single-polarization single-frequency ring-cavity optical fiber laser

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Embodiment 1

[0015] Embodiment 1 Concrete structure of the present invention

[0016] figure 1 It is a schematic structure diagram of the wavelength-tunable single-polarization single-frequency ring cavity fiber laser described in the present invention. Composed of pumping source 1, wavelength division multiplexer 2, erbium-doped fiber 3, fiber polarizer 4, polarization-maintaining fiber 5, bandpass filter 6, optical isolator 7, 2×2 optical coupler 8, two-mode gradient It consists of a refractive index fiber 9, a fiber circulator 10, and a polarization controller 11.

[0017] Their connection relationship is: the output port of the pump source 1 is connected to the 980nm port of the wavelength division multiplexer 2, the 1550nm port of the wavelength division multiplexer 2 is connected to one end of the fiber polarizer 4, and the other end of the fiber polarizer 4 Connect to one end of the polarization-maintaining optical fiber 5, the other end of the polarization-maintaining optical fib...

Embodiment 2

[0019] Embodiment 2 Working principle of the present invention

[0020] The wavelength-tunable single-polarization single-frequency ring-cavity fiber laser of the present invention adopts a reverse pumping structure, and the 980nm pumping optical signal sent by the pumping source 1 pumps a section of erbium-doped optical fiber 3 through the wavelength division multiplexer 2, and the optical isolation The device 7 is used to ensure that the laser signal in the ring resonator runs clockwise, and the reverse spontaneous emission optical amplification signal (generated by the erbium-doped fiber 3) enters the birefringent fiber filter composed of the fiber polarizer 4 and the polarization-maintaining fiber 5. Birefringent fiber filters effectively select single-polarized optical signals, and their good polarization-maintaining characteristics are beneficial to the single-polarization output of fiber lasers, while their narrow-band filtering characteristics are beneficial to suppress...

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Abstract

The invention discloses a wavelength-tunable single-polarization single-frequency ring-cavity optical fiber laser, and belongs to the technical field of optical fiber lasers. The wavelength-tunable single-polarization single-frequency ring-cavity optical fiber laser structurally comprises a pump source (1), a wavelength division multiplexer (2), an erbium-doped optical fiber (3), an optical fiber polarizer (4), a polarization maintaining optical fiber (5), a band-pass filter (6), an optical isolator (7), a 2*2 optical coupler (8), a two-mode graded-refractive index optical fiber (9), an optical fiber circulator (10) and a polarization controller (11). The wavelength-tunable single-polarization single-frequency ring-cavity optical fiber laser adopts a compact and simple structural design to obtain high-quality laser output, is high in practicality, not only has a single-frequency characteristic, but also has a single-polarization characteristic, and is applicable to both a high-speed optical fiber communication system and a polarization-sensitive optical fiber system.

Description

technical field [0001] The invention belongs to the technical field of fiber lasers, in particular to a wavelength-tunable single-polarization single-frequency ring-cavity fiber laser. Background technique [0002] Fiber laser has the characteristics of high yield, good heat dissipation, and high coupling efficiency with optical fiber system. It has broad application value in the fields of optical fiber communication, optical microwave, optical fiber sensing, etc., such as the mode interference ring cavity fiber laser disclosed in Chinese patent CN103852092A The sensor combines mode interference sensing and fiber laser resonance, and can be used for sensing and measuring various physical quantities such as displacement, temperature, and strain. At present, most erbium-doped fiber lasers operate in the multi-longitudinal mode state, which limits their application in high-speed optical fiber communication systems. For this reason, researchers propose to use phase-shifted fiber...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/091
CPCH01S3/06712H01S3/06791H01S3/091
Inventor 孙铁刚郭玉彬宋之磊刘美佟霍佳雨
Owner JILIN UNIV
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