Optimal design of L-band EDFAs with high-loss inter-stage elements

Tong, Zhi; Wang, Huai; Li, Tangjun; Jian, Shuisheng

doi:10.1016/s0030-4018(03)01720-6

Cited by 3 publications

(4 citation statements)

References 14 publications

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“…After detailed analysis, trial-manufacture and test, it is clear that the time-delay ripple coefficient of fibre gratings can be directly affected by the phase difference between phase mask units. [13,14] Actually fibre gratings are composed of several F-P cavities which are made between chisel stripes of two adjacent fibre gratings. In the situation of same fibre gratings length, the larger dispersion compensation is wanted, the smaller period difference of two adjacent F-P cavities is demanded, which means that the ripple increases with the increased F-P effect.…”

Section: Cfbg Manufacturementioning

confidence: 99%

The system of L-band 2 × 10 Gb/s WDM transmission over conventional single mode fibre with 600 km by chirped fibre Bragg gratings dispersion compensation

et al. 2007

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A chirped fibre Bragg grating according to ITU-T suggested L-band (2nd channel λ 1 = 1570.83 nm; 80th channel λ 2 = 1603.57 nm) with more than 1800 ps/nm single channel dispersion compensation is presented in this paper, of which the cladding mode loss, the delay curve ripple and the power fluctuation of the reflected spectrum are less than 0.5 dB, 50 ps and 0.25 dB, respectively. With this new FBG as dispersion compensation device, a 2 × 10 Gb/s wavelength division multiplexing (WDM) L-band transmission of 600 km based on conventional single mode fibre (G.652 fibre) is performed without forward error correction. The bit error rate (BER) is less than 10 −12 and the power penalties of the 2nd and 80th channel of L-band are 1.8 dB and 2.0 dB, respectively.

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Section: Cfbg Manufacturementioning

confidence: 99%

The system of L-band 2 × 10 Gb/s WDM transmission over conventional single mode fibre with 600 km by chirped fibre Bragg gratings dispersion compensation

et al. 2007

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“…5, 6(c), and 6(d)] are not the same as those of C-band. To derive a higher pump-utilization ratio, an OI unit with pump path (composed of two pumpsignal WDM couplers) is used to restrain the backward ASE, and the pump power (include backward pumping) is coupled into the high-concentration EDF (Table 1) at a selected position to utilize the enhancement of power conversion efficiency with the secondary pumping effect [2,8]. The GFF used in the C-band is not needed in the L-band EDFA because it has a flat gain profile.…”

Section: Applications For Edfa Optimizationmentioning

confidence: 99%

“…For the L-band EDFA, utilization of the C-band ASE as the second pump is a very effective method to improve the amplifier's performance. A section of unpumped EDF can be used for this purpose [2,8]. But from the results of optimizations we find that this method should be utilized at proper conditions.…”

Section: Component Position Pump-power Allocationmentioning

confidence: 99%

Use of a genetic algorithm to optimize multistage erbium-doped fiber-amplifier systems with complex structures

Wang¹,

Tong²,

Jian³

2004

Opt. Express

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We propose optimizing multifunctional multistage erbiumdoped fiber amplifiers (EDFAs) with complex structures by use of a genetic algorithm. With this method, we investigated optimum configurations of C- and L-band gain-flattened multistage EDFAs containing gain-flattening filters and high-loss interstage elements for dense wavelength-division multiplexing systems in detail and compared the amplifiers with various kinds of configurations under different design criteria. With the guidance of optimization results, the roles of all the factors such as pumping schemes, pump-power allocation, component position, and insertion loss in the optimization of EDFAs have been studied, and useful guidelines for optimizations have been provided.

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“…When a gain-flattening filter is used in the interstage between two EDFAs in a DS-EDFA configuration, it aids in providing automated signal-power control [13]. A theoretical investigation with simulated results for the three-stage and four-stage L-band EDFA with 12 dB interstage loss has been shown in [14]. The use of an interstage narrow bandpass optical filter has been proven to enhance the gain and output power of a DS-EDFA [6], [15]- [19].…”

Section: Introductionmentioning

confidence: 99%