Gain variations in optically gain clamped erbium doped fiber amplifiers

Krol, Mark F.; Liu, Y.; Watkins, James J.; Dailey, Michael J.

doi:10.1109/ecoc.1998.732427

Cited by 10 publications

(5 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 1 shows the amplifier gain and noise figure as a function of input optical power from a gain-clamped Erbium doped fiber amplifier (GC-EDFA) built in our laboratories [11]. G 0 ≈ 108.64 (20.36 dB), F 0 ≈ 4.32 (6.35 dB), and P sat ≈ 14.12 dBm are the non-saturated gain, amplifier noise factor for low input optical powers, and amplifier output saturation power values, respectively, obtained by fitting the experimental results using (2). The experimental results are typical from EDFAs and are represented by symbols.…”

Section: Optical Amplifier Noise Figure Modeling Approachesmentioning

confidence: 99%

“…The wavelength of the clamping laser should lie within the ASE bandwidth. The gain provided by the doped fiber should compensate for the feedback cavity losses [2].…”

Section: Introductionmentioning

confidence: 99%

“…Basically, there are two practical approaches: Pump power control through an optoelectronic feedback loop [1] or gain medium saturation control employing an all-optical feedback loop [2][3][4][5][6][7][8][9][10][11]. In the optoelectronic feedback approach the pump power is adjusted according to the signal power at the output of the amplifier.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impact of amplifier noise figure modeling in simulations of impairment-aware all-optical networks

et al. 2009

View full text Add to dashboard Cite

In this article, we analyze and quantify the impact of the use of different amplifier noise figure models in impairment-aware optical network simulations. We compare network simulations that use three different models, two of them already known and largely employed in the literature, and a third one that we propose here, which is more appropriate to use for gain-clamped amplifiers. We present simulation results for the network blocking probability for each model, for different amplifier output saturation powers. And we also present simulation results for the distribution of optical powers at the input of each amplifier in the network. From our results we can conclude in which cases one can use a simpler model and in which other cases it is worth using a more elaborate model. We show that if the simplest and most common model is used for any network simulation, the obtained blocking probability is overestimated.

show abstract

Section: Optical Amplifier Noise Figure Modeling Approachesmentioning

confidence: 99%

“…The wavelength of the clamping laser should lie within the ASE bandwidth. The gain provided by the doped fiber should compensate for the feedback cavity losses [2].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of amplifier noise figure modeling in simulations of impairment-aware all-optical networks

et al. 2009

View full text Add to dashboard Cite

show abstract

“…Amplifying multiple wavelengths simultaneously could result in gain instability among different wavelength components [19], [20]. To avoid this problem, a third-generation EDFA could be used.…”

Section: A System Stabilitymentioning

confidence: 99%

Wide-band photonically phased array antenna using vector sum phase shifting approach

Bui

Mitchell

Ghorbani

et al. 2005

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

In this paper, a wide-band photonically phased array antenna is demonstrated. The array configuration consists of a 4 1 Vivaldi single-polarization antenna array and an independent photonic phasing system for each element. The phasing network of this array is implemented using two novel photonic phase shifters based on the vector summation approach. A vector sum phase shifter (VSPS), which exhibits a frequency-linear characteristic from dc to 15 GHz and can be continuously tuned from 0 to 100 , is presented. A second-order VSPS (SO-VSPS), a modification of the VSPS that is capable of 0-430 phasing range, is also demonstrated. This paper presents the operation and characterization of each component of the array, including the radiating elements and the various photonic phase shifters and, finally, a demonstration of the combined system. A discussion on the practicality of this system for airborne applications is presented, along with suggestions for simplification and improvement.Index Terms-Microwave photonics and phase shifter, phased array antenna, true time delay.

show abstract

“…The automatic gain control (AGC) of the ROPA is indispensable in the wavelength routing/switching systems of photonic networks in future [8,9,10]. Moreover, realizing core-by-core AGC of a remotely pumped multicore EDFA, which has a shared pump light source for several cores of a multicore EDFA, is a crucial issue in a spatial division multiplexing transmission system [8,9,10]. An ROPA consists of a remotely pumped EDFA (RP-EDFA) section and a distributed Raman amplification (DRA) section [6].…”

Section: Introductionmentioning

confidence: 99%