NDLI: Effects of Variation of Quantum Well Number on the Performance of a Designed 635nm Ga 0.5 In 0.5 P/(Al 0.7 Ga 0.3 ) 0.5 In 0.5 P Multiple Quantum Well Red Laser

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Effects of Variation of Quantum Well Number on the Performance of a Designed 635nm Ga 0.5 In 0.5 P/(Al 0.7 Ga 0.3 ) 0.5 In 0.5 P Multiple Quantum Well Red Laser

Content Provider	Semantic Scholar
Author	Alam, Tawsif Ibne Rahim, Abdur Basak, Rinku
Copyright Year	2013
Abstract	In this work, the effects of variation of the number of quantum well on the performance characteristics of a GaInP - based 635nm multiple quantum well (MQW) separate confinement heterostructure (SCH) Red laser have been obtained through computations. The peak material gain of Ga0.5In0.5P/(Al0.5Ga0.5)0.5In0.5P MQW edge emitting laser obtained from the analysis has been used for analyzing the performance characteristics of the designed laser. The number of QW is optimized as 3 for obtaining better performance characteristics where the threshold current of the designed device is 6.7 mA. A maximum output power of 71.18 mW , a maximum resonance frequency of 8.6 GHz and a maximum modulation bandwidth of 13.85 GHz have been obtained for this designed laser at 64 mA injection current at 300K temperature having a 3QW structure. Theory of Quantum well lasers suggests that QW laser diodes have narrow active region for which quantum confinement occurs. The wavelength of the light emitted by a quantum well laser is determined by the width of the active region rather than just the bandgap of the material from which it is constructed. This means that much shorter wavelengths can be obtained from quantum well lasers than from conventional laser diodes using a particular semiconductor laser. The added advantage of the QW lasers is its efficiency. Quantum well lasers have greater efficiency than a conventional laser diode due to the stepwise form of its density of states function. In this paper, the performance analysis and optimization of a 635nm Ga0.5In0.5P/(Al0.5Ga0.5)0.5In0.5P MQW Separate Confinement Heterostructure Red Laser are presented considering the effects of quantum well number variation.
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://www.ijmse.org/Volume4/Issue2/paper6.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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