Stability Studies on Continuous-Wave Broadband Generated in an Erbium-Doped Fiber Ring Laser Using Highly Nonlinear Fiber (original) (raw)
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IEEE Photonics Journal, 2016
In this demonstration, we propose and investigate a stable and tunable singlelongitudinal-mode (SLM) erbium-doped fiber (EDF) ring laser structure. Here, in order to achieve the SLM output, the "eye-type" triple-ring scheme is designed in this EDF laser to suppress the densely spaced longitudinal modes. In the measurement, the output power and optical-signal-to-noise ratio (OSNR) are between 8.35 and 8.92 dBm and 33.2 and 35.7 dB, respectively, in the wavelength range of 1530 to 1560 nm. The proposed EDF laser architecture not only has free tuning step but provides stabilized and flattened output power spectrum as well.
Nonlinear wave mixing in a multilongitudinal-mode erbium-doped fiber laser
Optics Express, 2005
The emission spectrum of an erbium-doped fiber ring laser is shown to result from the nonlinear wave mixing taking place between the multiple oscillating longitudinal modes. The dependence of the resultant spectral broadening upon the signal power circulating in the laser cavity is investigated both theoretically and experimentally. In the case considered here, the extent of this spectral broadening is shown to be restrained only by the spectrally discriminating element inserted in the laser cavity. Predictions of the numerical simulations for the signal buildup and propagation in the laser cavity are found to be in good agreement with the experiment.
Stable and uniform multiwavelength erbium-doped fiber laser using nonlinear polarization rotation
Optics Express, 2006
A novel and simple technique, based on nonlinear polarization rotation (NPR) effect, to generate stable multiwavelength oscillations in an erbium-doped fiber laser is proposed and successfully demonstrated. The NPR effect effectively induced intensity-and wavelength-dependent loss to alleviate mode competition caused by homogeneous gain broadening in erbium-doped fibers. Up to 28-wavelength lasing operation with wavelength spacing of 0.8 nm has been achieved. The outputs had uniform power distributions, and the power fluctuation in each wavelength is smaller than 0.2 dB within a period of an hour.
Operating wavelength of erbium-doped fiber-ring laser
Microwave and Optical Technology Letters, 2001
The erbium-doped fiber ring laser (EDFL) exhibits a wavelength shift that results from the variation of its intracavity parameters, namely, the output-coupler reflectivity (R), active fiber length (L), and optical losses (α) in the resonant cavity. A simple and fast technique for predicting the operating wavelength of an EDFL is deduced. The operating wavelength shifts from ∼1530 to ∼1560 nm for higher values of R, longer L, and/or lower α, and vice versa. Data from numerical simulations show a good comparison with the experimental results. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 31: 105–107, 2001.
IEEE Photonics Journal, 2017
In this work, we demonstrate a wavelength-tunable erbium-doped fiber (EDF) ring laser with stable single-longitudinal-mode (SLM) output. Here using the self-injection method and unpumped EDF-based saturable absorber can suppress other densely sidemode to achieve SLM. Hence, the output power and optical signal-to-noise ratio of proposed EDF ring laser are between −7.1 and 2.1 dBm and 30.1 and 36.5 dB in the tuning range of 1525.0 to 1574.0 nm, respectively. According to the proposed EDF laser structure, the wavelength operation range can extend to shorter L-band from C-band. Moreover, the output stability of the proposed EDF ring laser is also executed experimentally.
Optimization of wavelength tuning of erbium-doped fiber ring lasers
IEEE/OSA Journal of Lightwave Technology, 1996
The dynamics of erbium-doped fiber ring lasers undergoing wavelength tuning is examined. The relaxation oscillations and mode build-up time are characterized. An all-optical damping technique which is capable of complete elimination of relaxation oscillations is analyzed, and measurements on a tunable erbium-doped fiber lasers are reported. An analytical solution is derived for the mode build-up time of tunable fiber lasers. Limiting parameters for the design of a high-speed tunable fiber laser are identified. An equalization technique for obtaining uniform switching speed is described.
Laser Physics, 2011
We propose and experimentally investigate a stable and tunable dual wavelength erbium doped fiber (EDF) dual ring laser scheme. Here, two tunable bandpass filters (TBFs) are used inside the dual ring gain cavity to generate dual wavelength lasing. And, due to the gain competition of the EDF gain cavity, the mode spacing (Δλ s) of lasing dual wavelength will be limited at different operating wavelengths. Hence, the minimum and maximum mode spacing in the proposed EDF laser scheme are 0.75 and 15.35 nm in C band range. Besides, the output performances of proposed fiber laser have also been studied and analyzed.