C+L band multi-wavelength optical fiber laser with one-way feedback

Abstract

The invention relates to the field of optical fiber lasers, in particular to a C+L band multi-wavelength optical fiber laser with one-way feedback, which comprises an optical fiber annular chamber, a high birefringence optical fiber annular mirror and an one-way feedback mirror, wherein the optical fiber annular chamber comprises a first semiconductor optical amplifier, a second semiconductor optical amplifier, an optical fiber annular chamber coupler, a first optical isolator, a second optical isolator, a first optical fiber polarization controller, a second optical fiber polarization controller and a circulator; the high birefringence optical fiber annular mirror comprises a 3dB coupler, a high birefringence optical fiber and a third optical fiber polarization controller; and the one-way feedback mirror is formed by sequentially connecting a fourth optical fiber polarization controller, an output coupler and a Faraday feedback mirror. The optical fiber laser of the invention can obtain multi-wavelength stable output in the C+L band at room temperature, the wavelength interval meets the WDM ITU (Wavelength Division Multiplex International Telecommunication Union) standard of 100GHz and can be integrally adjusted continuously in the range of 50GHZ, the line width of the output wavelength of the laser is less than 0.1nm, the output power of each channel is uniform, the power difference between every two wavelengths is less than 6dB, and the signal-to-noise ratio is greater than 25dB.

Description

technical field [0001] The invention belongs to the technical field of optical fiber lasers, and relates to a C+L band multi-wavelength optical fiber laser with single-pass feedback suitable for wavelength division multiplexing (WDM) systems, which can be applied to optical fiber communication, optical sensing and high-resolution optical testing and other methods. Background technique [0002] With the development of large-capacity optical fiber communication networks, wavelength division multiplexing technology has been widely used, especially dense wavelength division multiplexing has become the most economical and effective way to upgrade and expand optical fiber communication systems. Multi-wavelength fiber laser has the advantages of compatibility with optical fiber and optical fiber devices, narrow linewidth, high output power, low intensity noise, excellent stability, and can output more than two wavelengths at the same time. It is used in optical fiber communication,...

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Problems solved by technology

However, due to the unsatisfactory flatness of the SOA gain spectrum, in general, the output power of each longitudinal mode will fluctuate greatly

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