| Инд. авторы: | Bednyakova A.E., Fedoruk M.P., Turitsyn S.K., Kurkov A.S., Medvedkov O.I. |
| Заглавие: | On two-wavelength Raman fibre laser based on spectral broadening |
| Библ. ссылка: | Bednyakova A.E., Fedoruk M.P., Turitsyn S.K., Kurkov A.S., Medvedkov O.I. On two-wavelength Raman fibre laser based on spectral broadening // 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011. - 2011. - Art.5943185. - ISBN 9781457705335. |
| Внешние системы: | DOI: 10.1109/CLEOE.2011.5943185; SCOPUS: 2-s2.0-80052291789; |
| Реферат: | eng: Raman fibre lasers and converters using the stimulated Raman scattering (SRS) in optical fibre waveguide are attractive for many applications ranging from telecommunications to bio-medical applications [1]. Multiple-wavelength Raman laser sources emitting at two and more wavelengths have been proposed to increase amplification spectrum of Raman fibre amplifiers and to improve noise characteristics [2,3]. Typically, a single fibre waveguide is used in such devices while multi-wavelength generation is achieved by employing corresponding number of fibre Bragg grating (FBG) pairs forming laser resonator. This approach, being rather practical, however, might not provide a good level of cross coherence between radiation generated at different wavelengths due to difference in FBGs and random phase fluctuations between the two wavelengths. In this work we examine a scheme of two-wavelength Raman fibre laser with high-Q cavity based on spectral intracavity broadening [3]. We demonstrate feasibility of such configuration and perform numerical analysis clarifying laser operation using an amplitude propagation equation model that accounts for all key physical effects in nonlinear fibre: dispersion, Kerr nonlinearity, Raman gain, depletion of the Raman pump wave and fibre losses. The key idea behind this scheme is to take advantage of the spectral broadening that occurs in optical fibre at high powers. The effect of spectral broadening leads to effective decrease of the FBGs reflectivity and enables generation of two waves in one-stage Raman laser. The output spectrum in the considered high-Q cavity scheme corresponds to two peaks with 0.2 - 1 nm distance between them. © 2011 IEEE. |
| Ключевые слова: | Raman lasers; Raman pump; Random-phase; Spectral broadening; Two wavelength; Amplifiers (electronic); Electron optics; Fibers; Medical applications; Nonlinear equations; Numerical analysis; Optical fibers; Optics; Pumping (laser); Stimulated Raman scattering; Wavelength; Waveguides; Telecommunication; Resonators; Quantum electronics; Raman fibre lasers; Propagation equations; Physical effects; Output spectrum; Noise characteristic; Multiwavelength; Laser operations; Kerr nonlinearity; Intracavities; High-Q cavity; High power; Cross-coherence; Biomedical applications; Raman gain; Amplification spectra; |
| Издано: | 2011 |
| Физ. характеристика: | 5943185 |
| Конференция: | Название: 2011 Conference on Lasers and Electro-Optics Europe and 12th European Quantum Electronics Conference, CLEO EUROPE/EQEC 2011 Даты проведения: 2011-05-22 - 2011-05-26 |