Influence of lateral current spreading on the characteristics of high fill factor mesa-stripe laser diode arrays

Deepti Jain, Kamal Lohani, S. K. Mehta, Subodh Chandra, Pramod Kumar, Abhishek Sharma, Deepak Mohanty, Alok Jain, Satish Mohan

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We have investigated the effect of mesa depth on the characteristics of high fill factor (typically the inter- element spacing is <~20[im and stripe width~150 (xm) laser diode arrays (LDAs). Measurements were carried out on different laser diode bars and it was observed that a shallow mesa not only increases the threshold current of these laser bars but it can prevent lasing condition for a combination of geometrical parameters of mesa. Minimum mesa depth required to achieve lasing in these laser diode arrays is calculated as a function of inter-element spacing considering the effect of lateral current spreading. The work reported here shows that in order to achieve lasing in laser diode arrays with small inter-element distance, the mesa should be deep enough to prevent electrical coupling between the neighboring stripes of LDAs.

Original languageEnglish
Title of host publicationPhysics of Semiconductor Devices - 17th International Workshop on the Physics of Semiconductor Devices, 2013
EditorsV.K. Jain, Abhishek Verma
PublisherSpringer Science and Business Media Deutschland GmbH
Pages791-794
Number of pages4
ISBN (Print)9783319030012
DOIs
StatePublished - 2014
Externally publishedYes
Event17th International Workshop on the Physics of Semiconductor Devices, IWPSD 2013 - Noida, India
Duration: 10 Dec 201314 Dec 2013

Publication series

NameEnvironmental Science and Engineering
ISSN (Print)1863-5520
ISSN (Electronic)1863-5539

Conference

Conference17th International Workshop on the Physics of Semiconductor Devices, IWPSD 2013
Country/TerritoryIndia
CityNoida
Period10/12/1314/12/13

Bibliographical note

Publisher Copyright:
© Springer International Publishing Switzerland 2014.

Keywords

  • Fill factor
  • Laser Diode arrays
  • Mesa
  • Near field
  • current spreading
  • slope efficiency
  • threshold current

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