Broadband envelope flat full optical fiber multiple wavelength Raman laser

Abstract

The present invention belongs to the field of optical fiber laser technology, and features that the full optical fiber multi-wavelength Raman laser with flat broadband envelope consists of high nonlinearity Raman gain fiber, two wideband WDM couplers connected on two sides of the Raman gain fiber separately, zero-dispersion high nonlinearity fiber, comb filter, wideband fiber loop reflectors on two ends and fibers to constitute laser transmission channel. The full optical fiber multi-wavelength Raman laser may have increased optical coupler and wideband fiber coupler to constitute single-way circulating fiber ring cavity. Compared with conventional optical fiber multi-wavelength Raman laser, the present invention has the advantages of utilizing pump source with small wavelength number in obtaining flat broadband envelope and flexible waveband design of the output laser spectrum.

Description

technical field [0001] The invention belongs to the technical field of optical fiber laser and optical fiber communication, optical fiber sensing and spectrum measurement, in particular to a method for widening and flattening the lasing spectrum envelope of an optical fiber Raman laser and a multi-wavelength optical fiber Raman laser with a flat broadband envelope . Background technique [0002] With the rapid growth of various communication services such as data, voice, image, and multimedia, optical fiber communication technology has developed rapidly. Using wavelength division multiplexing (WDM) transmission technology is the most economical and effective way to upgrade and expand the optical fiber communication system. It is a laser source that can output multiple wavelengths at the same time, output laser spectrum envelope flat, stable lasing characteristics, and compact structure. become the key to realize this technology. Multi-wavelength lasers can provide the requ...

AI Technical Summary

Problems solved by technology

[0015] ①Because the output laser spectrum generated by multiple wavelength pumps generates a multi-peak envelope, even if the pump wavelength and its power configuration are carefully adjusted, it is difficult to obtain a multi-wavelength output laser spectrum with a flat envelope

[0016] ②If the number of pumping wavelengths is increased to improve the envelope flatness of the multi-wavelength output laser spectrum, it will inevitably lead to a complex laser structure and an increase in cost

[0017] To sum up, the existing multi-wavelength lasing technology cannot meet the requirements of flat output laser spectral envelope, equal wavelength interval, narrow laser line width, high signal-to-noise ratio, and stable power at the same time.

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