Controlling the Q-point in distributed feedback lasers using a numerical optimization methodology

Author

Hisham, Hisham K.

Source

Engineering and Technology Journal

Issue

Vol. 37, Issue 5A (31 May. 2019), pp.148-156, 9 p.

Publisher

University of Technology

Publication Date

2019-05-31

Country of Publication

Iraq

No. of Pages

9

Main Subjects

Engineering & Technology Sciences (Multidisciplinary)

Abstract EN

In this paper, a new methodology for controlling the Q-point in the distributed feedback (DFB) lasers is proposed.

The method based on reducing the DFB transient period (TP) by optimizing laser’s model parameters numerically.

The analysis has taken into account investigated the effects of the laser injection current (Iinj), the dc-bias level (Ibias), the temperature (T) variation, and the gain compression factor (ε).

Results showed that by optimizing the value of Iinj, Ibias, T and ε; the Q-point could be controlled effectively.

Where increasing the current ratio (i.e., Iinj/Ith) leads to reduce the TP value.

In addition, by increasing Iinj and/or Ibias, the relaxation oscillation period (TRO) and the laser delay time (TDelay) are reduced significantly.

From the other hand, the temperature varying may push the DFB laser to operate in an improper region through increasing the TP value; which may lead it to operate in the off-mode.

Moreover, as ε is increased, the sinusoidal oscillations are dramatically damped results in a reduction in the TRO value and larger period of stabilized.

American Psychological Association (APA)

Hisham, Hisham K.. 2019. Controlling the Q-point in distributed feedback lasers using a numerical optimization methodology. Engineering and Technology Journal،Vol. 37, no. 5A, pp.148-156.
https://search.emarefa.net/detail/BIM-892935

Modern Language Association (MLA)

Hisham, Hisham K.. Controlling the Q-point in distributed feedback lasers using a numerical optimization methodology. Engineering and Technology Journal Vol. 37, no. 5A (2019), pp.148-156.
https://search.emarefa.net/detail/BIM-892935

American Medical Association (AMA)

Hisham, Hisham K.. Controlling the Q-point in distributed feedback lasers using a numerical optimization methodology. Engineering and Technology Journal. 2019. Vol. 37, no. 5A, pp.148-156.
https://search.emarefa.net/detail/BIM-892935

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references : p. 156

Record ID

BIM-892935