Controlling the Q-Point in Distributed Feedback Lasers Using a Numerical Optimization Methodology
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...
| Main Author: | |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Unviversity of Technology- Iraq
2019-05-01
|
| Series: | Engineering and Technology Journal |
| Subjects: | |
| Online Access: | https://etj.uotechnology.edu.iq/article_168780_1bceecb9b4444db8ddc168fa179c8a76.pdf |
| _version_ | 1797326082944270336 |
|---|---|
| author | Hisham Hisham |
| author_facet | Hisham Hisham |
| author_sort | Hisham Hisham |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-08T06:18:27Z |
| format | Article |
| id | doaj.art-6e32365b0ad946fc8d52e60b8d30546a |
| institution | Directory Open Access Journal |
| issn | 1681-6900 2412-0758 |
| language | English |
| last_indexed | 2024-03-08T06:18:27Z |
| publishDate | 2019-05-01 |
| publisher | Unviversity of Technology- Iraq |
| record_format | Article |
| series | Engineering and Technology Journal |
| spelling | doaj.art-6e32365b0ad946fc8d52e60b8d30546a2024-02-04T17:12:05ZengUnviversity of Technology- IraqEngineering and Technology Journal1681-69002412-07582019-05-01375A14815610.30684/etj.37.5A.1168780Controlling the Q-Point in Distributed Feedback Lasers Using a Numerical Optimization MethodologyHisham Hisham0Electrical Engineering Department, Faculty of Engineering, Basra University,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.https://etj.uotechnology.edu.iq/article_168780_1bceecb9b4444db8ddc168fa179c8a76.pdfcritical systemdistributed feedback (dfb) lasersdynamic characteristicsequilibrium (q-point) pointsemiconductor diode lasers (sdls) transient response |
| spellingShingle | Hisham Hisham Controlling the Q-Point in Distributed Feedback Lasers Using a Numerical Optimization Methodology Engineering and Technology Journal critical system distributed feedback (dfb) lasers dynamic characteristics equilibrium (q-point) point semiconductor diode lasers (sdls) transient response |
| title | Controlling the Q-Point in Distributed Feedback Lasers Using a Numerical Optimization Methodology |
| title_full | Controlling the Q-Point in Distributed Feedback Lasers Using a Numerical Optimization Methodology |
| title_fullStr | Controlling the Q-Point in Distributed Feedback Lasers Using a Numerical Optimization Methodology |
| title_full_unstemmed | Controlling the Q-Point in Distributed Feedback Lasers Using a Numerical Optimization Methodology |
| title_short | Controlling the Q-Point in Distributed Feedback Lasers Using a Numerical Optimization Methodology |
| title_sort | controlling the q point in distributed feedback lasers using a numerical optimization methodology |
| topic | critical system distributed feedback (dfb) lasers dynamic characteristics equilibrium (q-point) point semiconductor diode lasers (sdls) transient response |
| url | https://etj.uotechnology.edu.iq/article_168780_1bceecb9b4444db8ddc168fa179c8a76.pdf |
| work_keys_str_mv | AT hishamhisham controllingtheqpointindistributedfeedbacklasersusinganumericaloptimizationmethodology |