Increasing dispersion tolerance of 10Gbit/s directly modulated lasers using optical filtering

Śliwczyński, Ł.; Krehlik, P.

doi:10.1016/j.aeue.2009.02.004

Cited by 5 publications

(1 citation statement)

References 14 publications

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“…[1][2][3] With the development of dense (DWDM) systems, lasers with the narrow linewidth, the high side mode suppressed ratio (SMSR), and the fixed wavelength with stable dynamic single-mode operation are indispensable. [1][2][3] With the development of dense (DWDM) systems, lasers with the narrow linewidth, the high side mode suppressed ratio (SMSR), and the fixed wavelength with stable dynamic single-mode operation are indispensable.…”

Section: Introductionmentioning

confidence: 99%

Characterization of small-signal intensity modulation of single-mode fiber grating Fabry-Perot laser source

Hisham

Abas

Mahdiraji

et al. 2012

OPT REV

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A comprehensive study on the small-signal intensity modulation (IM) characteristics of a fiber grating Fabry-Perot (FGFP) laser is numerically investigated. The effect of external optical feedback (OFB), temperature, injection current, cavity volume, nonlinear gain compression factor, and fiber grating (FG) parameters on IM characteristics are presented. The temperature dependence (TD) of IM is calculated according to the TD of laser cavity parameters instead of using the well-known Parkove relationship. It has been shown that the optimum external fiber length (L ext ) is 3.1 cm. The optimum range of working temperature for FGFP laser is between 23 to 27 C. We also show that by increasing the laser injection current from 10 to 60 mA, the IM peak amplitude decreased from 6.3 to 0.2 dB and the relaxationoscillation frequency (ROF) is shifted from 1.2 GHz towards higher frequency of 5.48 GHz. In addition, the AR coating reflectivity and gain compression factor have no significant effect on the IM. The study indicates that a stable operation and excellent modulation characteristic can be obtained after optimization process.

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