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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 19 — Sep. 14, 2009
  • pp: 16406–16414

Optimal laser welding assembly sequences for butterfly laser module packages

Jeong Hwan Song, Peter O’Brien, and Frank H. Peters  »View Author Affiliations

Optics Express, Vol. 17, Issue 19, pp. 16406-16414 (2009)

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We present an optimal laser welding assembly sequence for butterfly laser packages: 1) initial shift, 2) front welding, 3) rear welding, 4) joint gripper releasing, 5) mechanical fine tuning of horizontal misalignment. This sequence has been optimized significantly by modeling the initial shift and experimental investigations of three assembly sequences. Our results show that misalignment from the Post-Weld-Shift (PWS) can be compensated by accurately estimating the initial shift in the vertical direction. Furthermore, the laser hammering procedure, to compensate for misalignment of the vertical direction, can be eliminated by proper package design. Using only final mechanical tuning for horizontal misalignments, optical coupling efficiencies of 73-99% have been achieved for lasers packaged in butterfly modules.

© 2009 OSA

OCIS Codes
(140.0140) Lasers and laser optics : Lasers and laser optics
(220.0220) Optical design and fabrication : Optical design and fabrication
(250.0250) Optoelectronics : Optoelectronics

ToC Category:
Lasers and Laser Optics

Original Manuscript: April 2, 2009
Revised Manuscript: July 22, 2009
Manuscript Accepted: July 24, 2009
Published: August 31, 2009

Jeong Hwan Song, Peter O’Brien, and Frank H. Peters, "Optimal laser welding assembly sequences for butterfly laser module packages," Opt. Express 17, 16406-16414 (2009)

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