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Tunable erbium-doped optical fiber annular chamber laser

An erbium-doped fiber and laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve problems such as easy mode hopping, and achieve the effects of reducing the number of longitudinal modes, suppressing beat frequency noise, and simple installation

Inactive Publication Date: 2008-07-02
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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Problems solved by technology

Although the spectral line width of the erbium-doped fiber ring cavity laser is very narrow (less than 1kHz), the optical fiber itself is easily affected by environmental factors such as vibration and temperature. Therefore, in the design of erbium-doped fiber ring cavity lasers, the stability of the central wavelength and output power should be considered

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  • Tunable erbium-doped optical fiber annular chamber laser

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Embodiment Construction

[0022] In order to further illustrate the technical content of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments:

[0023] See figure 1 ,in figure 1 In the embodiment, the cavity tunable erbium-doped fiber ring cavity laser of the present invention includes:

[0024] An erbium-doped fiber 1; a WDM coupler 2; a polarization controller 3; a tunable laser 4; an optical isolator 5; an optical coupler 6 and an optical coupler 7; a circulator 8; a phase shift Fiber grating 9.

[0025] All common single-mode fibers are selected and connected to each element according to the structure shown in the figure to form a ring cavity.

[0026] Among them, WDM coupler 2 couples 980nm pump light into the gain medium of erbium-doped fiber 1; tunable laser 4 and isolator 5 are connected to the ring cavity through the input end of optical coupler 6; polarization controller 3 adjusts the incidence to the modulator ...

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Abstract

The invention relates to a tunable erbium-doped fiber ring laser which can output stable wavelength and power, which relates to an optical fiber communication technology. The tunable laser and an isolator of the invention are connected with the ring cavity through an input terminal of a first optical coupler, the 980nm pumping is optically coupled in the erbium-doped fiber gain medium by a WDM coupler; a second optical coupler is an output terminal; through controlling phase-shift phase of phase-shifted grating, filtering function can be realized; through regulating the wavelength of the injected laser of the tunable laser, injection locking can be realized and the laser can be stably outputted. The tunable single-longitudinal erbium-doped fiber ring laser of the invention has the advantages of low cost, simple device and easy operation; the tunable single-longitudinal mode output with output wavelength and wavelength of stable power can be finally obtained.

Description

Technical field [0001] The invention belongs to the technical field of optical fiber communication, and more specifically is a tunable single longitudinal mode erbium-doped fiber ring cavity laser with adjustable cavity length and stable output wavelength and power. Background technique [0002] The multi-wavelength tunable pulsed light source with stable wavelength plays an important role in the optical wavelength division multiplexing-time division multiplexing (WDM-OTDM) communication system. At present, multi-wavelength lasers are mainly divided into the following types: solid-state lasers, integrated Bragg distributed feedback (DFB) lasers, integrated vertical cavity surface emitting lasers, lasers using semiconductor optical amplifiers, and fiber lasers doped with rare earth elements. The first four types of multi-wavelength lasers are limited in their applications due to their large size, high production cost, and environmental sensitivity. However, multi-wavelength fiber ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/067H01S3/083H01S3/16G02B6/00
Inventor 刘超张欣
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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