Cover
Vol. 12 No. 2 (2017)

Published: January 31, 2017

Pages: 207-213

Original Article

Design Methodology for Reducing RIN Level in DFB Lasers

Hisham K. Hisham 1
1Electrical Engineering Department, Engineering College, University of Basrah, Basra, Iraq
History
  • Received: November 30, 2016
  • Available Online: January 31, 2017
DOI

https://doi.org/10.37917/ijeee.12.2.11

Abstract

The relative intensity noise (RIN) characteristics in distributed feedback (DFB) lasers are analyzed theoretically by proposing a new methodology. In addition to temperature variation (T), the effect of other model parameters such as injection current (I inj ), active layer volume (V), spontaneous emission (β sp ) and gain compression (ε) factors on RIN characteristics is investigated. The numerical simulations shows, the peak RIN level can be reduced to around –150 dB/Hz, while relaxation oscillation frequency (ROF) is shifted towards 5.6 GHz. In addition, the RIN level is increased with temperature by the rate of 0.2 dB/ºC and ROF is reduced by the rate of 0.018 GHz/ºC. Results show, the low RIN level can be obtained by selecting model parameters reasonably.

Keywords

References

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