Large-signal theory of the effect of dispersive propagation on the intensity modulation response of semiconductor lasers

Peral, Eva; Yariv, Amnon

doi:10.1109/50.818911

Cited by 35 publications

(20 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Then, after performing and retransformation, the expression (12) will denote the time-dependent, filtered optical field prior to photodetection.…”

Section: Bandpass Filteringmentioning

confidence: 99%

“…Its time-dependent optical field can be written as (1) where the factor is the optical field strength of the unmodulated device, the second factor represents the intensity modulation with as the IM index, and the third factor represents the frequency modulation contribution, with as the FM index. Further, , , and denote angular optical emission frequency, the angular electrical modulation frequency, and the deviation angle between IM and FM, respectively [12], [14], [15]. A chirp factor can subsequently be used to substitute the FM index.…”

Section: A Single-tone Modulationmentioning

confidence: 99%

See 1 more Smart Citation

Millimeter-wave signal properties resulting from electrooptical upconversion

Kojucharow¹,

Sauer

Schäffer³

2001

IEEE Trans. Microwave Theory Techn.

View full text Add to dashboard Cite

This paper describes the combined effects of laser chirp, electrooptical mixing, dispersive fiber transmission, and photodetection on the nonlinear signal properties of the electrooptically generated millimeter-wave signal (60 GHz). Analytical expressions describing the complex currents of fundamental and higher order products are provided for the case of single-tone modulation as well as for two-tone modulation, respectively. Examples will be considered including the nonlinear amplitude response (output power at millimeter-wave range versus input power at IF), the nonlinear phase response (relative output phase at millimeter-wave range versus input power at IF), the input related 1-dB gain compression condition, the amplitude response of third-and fifth-order intermodulation products, as well as the input related intercept points for the latter signals. The model developed performed well, even under moderate to large signal conditions, and very good agreement has been achieved between theory and experiment.

show abstract

“…Then, after performing and retransformation, the expression (12) will denote the time-dependent, filtered optical field prior to photodetection.…”

Section: Bandpass Filteringmentioning

confidence: 99%

Section: A Single-tone Modulationmentioning

confidence: 99%

Millimeter-wave signal properties resulting from electrooptical upconversion

Kojucharow¹,

Sauer

Schäffer³

2001

IEEE Trans. Microwave Theory Techn.

View full text Add to dashboard Cite

show abstract

“…Moreover, in [7], both experimental and theoretical studies of the problem were performed in large-signal direct modulation. In both cases, the models that relate the laser chirp to the IM of the laser source were very detailed.…”

Section: Introductionmentioning

confidence: 99%

“…A more rigorous introduction of the chirping effect in Eq. (1) can be made (see, for example, [6,7,11]). However, in the hypothesis of modulation frequencies well below the relaxation resonance of the laser sources, it is allowable to assume a frequency deviation proportional and in phase with the intensity modulation [3,12].…”

mentioning

confidence: 99%

Efficient characterization of harmonic and intermodulation distortion effects in dispersive radio over fiber systems with direct laser modulation

Tartarini

Faccin²

2005

Microw. Opt. Technol. Lett.

View full text Add to dashboard Cite

results from the Mie series. But for higher values of , the PMCHWT formulation gives incorrect results, while the present formulation still agrees with the Mie series. For ϭ 10 5 S/m, ͉ r ͉ ϭ 1.8 ϫ 10 11 and the skin depth is about 16 mm. The present formulation still works well, even when is as high as 10 8 S/m and the corresponding skin depth is about 0.5 mm. So the present formulation can work with much higher conductivities than the PMCHWT formulation, due to the effective suppression of the error contribution from the internal conductive region.To explore the generality of the present formulation, a highfrequency case using RWG basis is also calculated and the results are illustrated in Figure 4. The frequency here is 10 MHz. For varying from 1 to 1000 S/m, the present formulation provides overall satisfactory performance, while the PMCHWT formulation gives incorrect results when is higher than 10 S/m.For ϭ 10 4 S/m, the new formulation also fails to give correct results, because the skin depth is too small to be accurate enough for the typical seven-point Gaussian quadrature integration, even when the error has already been suppressed. To increase the integration accuracy, we simply divide each triangular patch into four subpatches and apply the seven-point Gaussian quadrature integration to each subpatch, thus effectively increasing the integration points per patch. Note that here the number of basis functions is not increased. Then the new formulation gives a correct result again, as shown in Figure 4(f). Although using subpatches is not the most efficient way to improve the integration accuracy, we illustrate the fact that the number of basis functions does not have to increase with the internal-region wavenumber.The present formulation performs better in the low-frequency band than in the higher frequencies because, for the same skin depth, ͉ r2 ͉ is larger at lower frequencies and thus the internalregion terms are suppressed by a larger factor. Hence, the accuracy of the internal-region terms will be less important for lower frequencies. CONCLUSIONA new SIE formulation has been obtained by tuning the weighting coefficients of the integral equations for the external and internal regions, respectively. Thus, the integration error over the Green's function for the internal conductive region is suppressed and the present formulation provides satisfactory results in a significantly larger range of skin depths than previous SIE formulations. The present formulation can also work in tandem with techniques that improve the integration accuracy for Green's functions in conductive media in order to further enlarge the solvable range of conductivities. INTRODUCTIONThe analysis of harmonic and intermodulation distortion is of great concern in the design of analog or subcarrier multiplexed (SCM) optical systems. These effects may negatively affect the performance of systems that exploit, for example, wavelength conversion via cross gain modulation (XGM) in semiconductor optical amplifiers (SOAs) [1] or systems tha...

show abstract

“…It is worth noting that in the majority of studies of AFOLs, either numerical analysis [1,13] or rather complicated mathematical apparatus [14] are usually used. This makes difficult obtaining the simple analytical expressions suitable for the engineering design of the fiber-optic links.…”

Section: Transmission Of Light Intensity Modulation Signals In Analogmentioning

confidence: 99%