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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 21, Iss. 7 — Apr. 8, 2013
  • pp: 8276–8285

Merged beam laser design for reduction of gain-saturation and two-photon absorption in high power single mode semiconductor lasers

M. Lysevych, H. H. Tan, F. Karouta, L. Fu, and C. Jagadish  »View Author Affiliations

Optics Express, Vol. 21, Issue 7, pp. 8276-8285 (2013)

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In this paper we report a method to overcome the limitations of gain-saturation and two-photon absorption faced by developers of high power single mode InP-based lasers and semiconductor optical amplifiers (SOA) including those based on wide-waveguide or slab-coupled optical waveguide laser (SCOWL) technology. The method is based on Y-coupling design of the laser cavity. The reduction in gain-saturation and two-photon absorption in the merged beam laser structures (MBL) are obtained by reducing the intensity of electromagnetic field in the laser cavity. Standard ridge-waveguide lasers and MBLs were fabricated, tested and compared. Despite a slightly higher threshold current, the reduced gain-saturation in MBLs results in higher output power. The MBLs also produced a single spatial mode, as well as a strongly dominating single spectral mode which is the inherent feature of MBL-type cavity.

© 2013 OSA

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(140.3410) Lasers and laser optics : Laser resonators
(140.3570) Lasers and laser optics : Lasers, single-mode
(140.5960) Lasers and laser optics : Semiconductor lasers
(250.0250) Optoelectronics : Optoelectronics

ToC Category:
Lasers and Laser Optics

Original Manuscript: January 11, 2013
Revised Manuscript: March 13, 2013
Manuscript Accepted: March 15, 2013
Published: March 28, 2013

M. Lysevych, H. H. Tan, F. Karouta, L. Fu, and C. Jagadish, "Merged beam laser design for reduction of gain-saturation and two-photon absorption in high power single mode semiconductor lasers," Opt. Express 21, 8276-8285 (2013)

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