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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 8 — Apr. 14, 2008
  • pp: 5790–5796

Nonuniform output characteristics of laser diode with wet-etched spot-size converter

Joong-Seon Choe, Yong-Hwan Kwon, Sung-Bock Kim, and Jung Jin Ju  »View Author Affiliations

Optics Express, Vol. 16, Issue 8, pp. 5790-5796 (2008)

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We study the output characteristics of spot-size converter (SSC) integrated buried heterostructure (BH) laser diode (LD) by forming SSC with wet etching process. SSC-LD shows large chip-to-chip variation in threshold current(Ith) and slope efficiency (ηslope) compared to LD without SSC. Ith and ηslope are closely related with each other so that the front facet ηslope increases while the rear facet ηslope decreases with Ith. Far-field angle is also found to be proportional to the front facet ηslope. The trends observed are explained clearly by a unidirectional loss occurring when photons travel from the front to rear facet.

© 2008 Optical Society of America

OCIS Codes
(250.5960) Optoelectronics : Semiconductor lasers
(250.5590) Optoelectronics : Quantum-well, -wire and -dot devices

ToC Category:

Original Manuscript: February 14, 2008
Revised Manuscript: April 3, 2008
Manuscript Accepted: April 5, 2008
Published: April 10, 2008

Joong-Seon Choe, Yong-Hwan Kwon, Sung-Bock Kim, and Jung Jin Ju, "Nonuniform output characteristics of laser diode with wet-etched spot-size converter," Opt. Express 16, 5790-5796 (2008)

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