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Single-longitudinal-mode erbium-doped fiber laser based on gourd-shaped auxiliary cavity

An erbium-doped fiber and gourd-shaped technology, which is applied in the laser field, can solve the problems of unstable output power and laser spectrum broadening, and achieve the effects of stable power, stable single longitudinal mode output, and expanded free spectral range

Inactive Publication Date: 2019-05-24
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

Due to the inherent gain unevenness of the erbium-doped fiber, serious mode competition will occur in the fiber laser, the laser is in a multi-longitudinal mode state, the laser spectrum is broadened, and the output power is unstable

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  • Single-longitudinal-mode erbium-doped fiber laser based on gourd-shaped auxiliary cavity
  • Single-longitudinal-mode erbium-doped fiber laser based on gourd-shaped auxiliary cavity
  • Single-longitudinal-mode erbium-doped fiber laser based on gourd-shaped auxiliary cavity

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Embodiment Construction

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are Some, but not all, embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0030] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in detail:

[0031] figure 1 It is the structural representation of this embodiment, as can be seen from the figure, the components of this embodiment include: erbium-doped fiber EDF-A / B 1,5,980 / 1550nm wavelength division multiplexer WDM 2,980nm semi...

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Abstract

The invention discloses a single-longitudinal-mode erbium-doped fiber laser based on a gourd-shaped auxiliary cavity, and belongs to the technical field of laser. The system comprises a 980nm semiconductor laser, a 980 / 1550nm wavelength division multiplexer, erbium-doped fibers A and B, an optical coupler, a fiber Bragg grating, a polarization controller, a polarization beam splitter, the gourd-shaped auxiliary cavity and isolators A, B and C. The 980nm semiconductor laser is used for pumping of the erbium-doped fiber A through the 980 / 1550nm wavelength division multiplexer to generate stimulated radiation light. Under the action of the isolator A and the isolator B, the stimulated radiation light is transmitted in the anticlockwise direction. Under the action of the Er-doped fiber B, thefiber Bragg grating, the polarization controller, the polarization beam splitter and the gourd-shaped auxiliary cavity, the stimulated radiation light is finally transmitted in the cavity in only onestable mode; and the stable transmission mode is outputted through the optical coupler and the isolator C. The fiber laser is novel in concept, is simple in structure, can solves a problem of multi-longitudinal-mode oscillation in an annular cavity Er-doped fiber laser, reduces the line width of the fiber laser, and has a wide application range.

Description

technical field [0001] The invention relates to a single longitudinal mode erbium-doped fiber laser based on a gourd-shaped auxiliary cavity, and belongs to the field of laser technology. Background technique [0002] Compared with semiconductor lasers, fiber lasers have significant advantages: high surface area / volume ratio, good heat dissipation effect; long gain medium can be used to obtain high power output; natural compatibility with fiber optic components, high coupling efficiency; output Good beam quality; low noise; low laser threshold, etc. With the development of related technologies, fiber lasers have been widely used, showing broad market prospects. Through an effective longitudinal mode selection and control mechanism, the fiber laser can work in a stable single longitudinal mode state, and the fiber laser at this time is usually called a single longitudinal mode fiber laser. The output spectral linewidth of a fiber laser working in a single longitudinal mode ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/0941H01S3/10H01S3/098
Inventor 商建明唐丽华乔耀军喻松王正康
Owner BEIJING UNIV OF POSTS & TELECOMM
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