Dynamic compensation of transient gain saturation in erbium-doped fiber amplifiers by pump feedback control

Motoshima, K.; Leba, L.M.; Chen, D.N.; Downs, M. M.; Li, T.; Desurvire, E.

doi:10.1109/68.262563

Cited by 37 publications

(18 citation statements)

References 6 publications

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“…3 shows the lower bound on pump power versus normalized steady-state reservoir, with input power per channel as a parameter when all eight WDM channels are present. Such a minimum pump is the one needed by the open-loop amplifier to guarantee the required gain level and profile with all channels present, and thus to ensure the 1 The oscillation condition on the signal phase is neglected here since the lasing modes form a continuum, because the loop delay l is usually more than six orders of magnitude larger than the mode period. existence of the laser oscillation in all other possible static configurations of the WDM system.…”

Section: Steady-state Analysismentioning

confidence: 99%

“…We interpret (1) as the balance between the amplifier's input and output photon fluxes, being the net contribution of that balance the reservoir's variation per unit time.…”

Section: Modelmentioning

confidence: 99%

“…1 Since the ASE power in the feedback filter bandwidth can be made small enough by appropriately choosing the filter bandwidth, in the following we will use (5) to get the steady-state reservoir solution. Note that (5) is the equation of the loop loss contour shown in Fig.…”

Section: Steady-state Analysismentioning

confidence: 99%

“…A first class uses some optical measure of inversion at the output of the amplifier to produce an error signal which electrically controls the power of either the pump or of an extra control input laser source [1]- [5].…”

mentioning

confidence: 99%

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Design of gain-clamped doped-fiber amplifiers for optimal dynamic performance

Bononi

Barbieri

1999

J. Lightwave Technol.

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Abstract-This paper provides a detailed analysis of gainclamped doped-fiber amplifiers and design guidelines in a wavelength division multiplexed (WDM) networking environment. A simple dynamic model of the doped-fiber amplifier allows us to derive explicit expressions for the small-signal response, which help identify and optimize the most critical parameters for best dynamic performance. The most important parameter is the pump power, which should be chosen 1-2 dB's above its required open-loop value, with all channels present, for the required signal gain. In an all-optical networking scenario with input power per channel as high as 03 dBm the required pump power may well exceed 20 dBm. Thus optimization of other parameters such as laser wavelength and loop loss are important. For best dynamic performance either the loop loss should be extremely small, implying a very large laser flux, or the laser gain variation in response to a perturbation should be large. Accordingly, the laser wavelength should be placed either close to the unity-gain region of the clamped gain profile, or at its peak. Finally, the small signal model for a chain of clamped amplifiers is provided, and it is shown that long chains are vulnerable to low-frequency input signal perturbations.Index Terms-Doped-amplifier gain dynamics, erbium-doped fiber amplifier (EDFA), gain-clamping.

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Section: Steady-state Analysismentioning

confidence: 99%

“…We interpret (1) as the balance between the amplifier's input and output photon fluxes, being the net contribution of that balance the reservoir's variation per unit time.…”

Section: Modelmentioning

confidence: 99%

Section: Steady-state Analysismentioning

confidence: 99%

mentioning

confidence: 99%

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Design of gain-clamped doped-fiber amplifiers for optimal dynamic performance

Bononi

Barbieri

1999

J. Lightwave Technol.

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“…In order to maintain the overall network performance, the power of the surviving channels must be kept within acceptable limits. For that, several transient control techniques have been proposed, of which the main three are referred to as pump control, link control, and laser control [3]- [9]. One of them, the link control protection technique [4], is preferred for its simplicity and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Per-band link control transients protection in distributed fiber Raman amplifier cascades

Pincheira

Soto

Olivares

2009

2009 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)

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Abstract-In this work we introduce the use of the per-band link control method in cascades of distributed fiber Raman amplifiers (DFRAs) for compensating power transients of WDM channels. By using two compensation channels, each one controlled by a proportional-integrative electronic control circuit and assigned to a particular signal band, the power excursion achieved in the surviving channels, in a cascade of 10 DFRAs, is reduced from 4.88 dB to 0.24 dB, when 17 out of 20 channels are added or dropped. By adding more compensation channels, this transient protection technique can be extended to wideband DFRAs applications.

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