Six-wavelength Raman fibre laser for C- and L-band Raman amplification and dynamic gain flattening

Mermelstein, Marc D.; Horn, Christopher B.; Radic, S.; Headley, C.

doi:10.1049/el:20020433

Cited by 30 publications

(31 citation statements)

References 5 publications

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“…Wavelength tunable synchronous pulse sources are highly desirable for spectroscopy and optical diagnostics due to their diverse advantages such as broadband operation, low cost, compactness, and adaptability with fibers [1][2][3]. The common method to generate short pulses in the fiber is the use of optical nonlinearities and soliton pulse shaping in the anomalous dispersion regime that results in spectral broadening and pulse compression [4].…”

Section: Introductionmentioning

confidence: 99%

Stability analysis of pulsed cascaded Raman lasers in dispersion-managed systems

et al. 2011

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We investigate synchronous first and second order pulsed Raman lasers that can achieve frequency spacing of up to 1000 cm −1 for CARS microscopy applications. In particular, we focus on analytical and numerical analysis of pulsed stability derived for Raman lasers by using dispersion-managed telecom fibers and pumping at near 1530 nm telecom wavelengths. We show the evolution of the first and second order Stokes signals at the output for different peak pump power and the net anomalous dispersion combinations. We determine the stability condition for dispersion-managed synchronous Raman lasers up to second order. The results show that the stable second order Raman Stokes pulses with 0:02 W to 0:1 W peak power and 1 ps to 2:1 ps pulse width can be achieved in proposed dispersion-managed systems.

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Section: Introductionmentioning

confidence: 99%

Stability analysis of pulsed cascaded Raman lasers in dispersion-managed systems

et al. 2011

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“…WDM systems, optical fiber sensors, and optical component testing [1][2][3]. Multi-wavelength lasing has been achieved with various gain mechanisms including Erbium-doped fiber amplification (EDFA), semiconductor optical amplification (SOA) [1,2], and fiber Raman amplification (FRA) [3,4]. Multi-wavelength Erbium-doped fiber lasers (MEDFLs) based on EDFs have been investigated widely due to their advantages such as the high power conversion efficiency (PCE) and lower threshold.…”

Section: Introductionmentioning

confidence: 99%

Stable and Wavelength-range-controllable Multi-wavelength Fiber Laser Based on Raman and Erbium-doped Fiber Hybrid Gain Mechanism

Qin

Chen

2007

2007 Conference on Lasers and Electro-Optics - Pacific Rim

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“…The experimental data shown in Fig. 2 were received on distributed Raman amplifier on TrueWave RS optical fiber [11]. However, good conformity of calculated curves courses for the amplified spontaneous emission with noise figures of the real amplifier specifies applicability of the actual band model for estimation of Raman amplifiers noise performance.…”

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confidence: 88%

“…Fig. 2 shows the theoretical results of ASE spectra (solid line) for 6 wavelengths pumping Raman amplifier in C + L band and it is compared with experimental data for the effective noise figure [11] (points with dashed lines). Modeling conditions are as followed.…”

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confidence: 99%

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Actual band model for design of optical fiber raman amplifier with multiwave pumping

Felinskyi

Korotkov²

Proceedings of CAOL 2005. Second International Conference on Advanced Optoelectronics and Lasers, 2005.

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In present work, we will propose the spectroscopic model for the analysis of Raman gain spectrum based on oscillator theory and its application to the design of optical fiber Raman amplifiers with the multiwavelength pumping scheme. The oscillatory lineshape functions can simply describe the wavelength dependence of Raman gain in optical fibers and are very useful for the estimation of the gain bandwidth, Raman lasing, noise performance, and amplification processes in Raman amplifiers. The concept of an actual band based on the lineshape function is useful for the design of fiber Raman amplifiers with multiple wavelengths pumping. Proposed modeling allows us to analyze fiber Raman amplifier with combined multiwavelength pumping source for the extension of amplification banrwidth to L-band, which has the broad bandwidth over 80 nm and low gain ripple less than 0.5 dB.Fiber Raman amplifiers (FRA) are being deployed in almost every new long-haul fiberoptic transmission systems [1]. Despite the simple architecture of a Raman amplifier, many factors in the design of amplifiers such as pump-to-pump power transfer, signal-to-signal power transfer, pump depletion (saturation), double Rayleigh scattering (multipath interference), and amplifier spontaneous noise should be considered [2]. The simplistic design of the multiple pumping Raman amplifier results to a very poor amplifier when the evenly spaced eight pumps with equal pump power of 120 mW gives the FRA with the gain variation more than 10 dB [2]. Numerical optimization methods for the optimal determination of the power and wavelength of each pump source based on the coupled equations such as simulated annealing algorithm [3], single-layer feedforward neural networks [4], and so on [5] have been investigated. The theoretical analysis of the Raman gain coefficient with one pumping wavelength in optical fiber and comprehensive analysis of its scaling with wavelength, modal overlap, and material composition are also reported [6].In present work, we will propose the spectroscopic model for the analysis of Raman gain spectrum based on oscillator theory and its application to the design of wideband optical FRA.Pumping saturation is not negligible in distributed optical fiber Raman amplifier with multiple wavelengths pumping. The pumps depletion caused by interaction between the pumps and the amplified signals is described by a well-known set of coupled equations [2][3][4][5]8]. When the frequency dependence of the Raman gain gR(v) is modeled as a frequency independent constant or simple single peak, for example as a triangle, the numerical methods may give the unsatisfactory results because the solutions of coupled equation are very sensitive to absolute values ofequation coefficients.According to the semi-classical derivation [6], spontaneous Raman scattering (SRS) can be described in terms of classical optical fields and the molecular system can be treated as a forced harmonic oscillator. This model reveals the connection between the differential polarizability (aa, /aq...

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Six-wavelength Raman fibre laser for C- and L-band Raman amplification and dynamic gain flattening

Cited by 30 publications

References 5 publications

Stability analysis of pulsed cascaded Raman lasers in dispersion-managed systems

Stability analysis of pulsed cascaded Raman lasers in dispersion-managed systems

Stable and Wavelength-range-controllable Multi-wavelength Fiber Laser Based on Raman and Erbium-doped Fiber Hybrid Gain Mechanism

Actual band model for design of optical fiber raman amplifier with multiwave pumping

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