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Open Access
A Lens-Integrated Surface-Emitting DFB Laser and Its Application to Cost-Effective Single-Mode Optical Sub Assembly

Koichiro ADACHI, Takanori SUZUKI, Shigehisa TANAKA

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Summary :

A lens-integrated surface-emitting DFB laser and its application to low-cost single-mode optical sub-assemblies (OSAs) are discussed. By using the LISEL, high-efficient optical coupling with reduced number of optical components and non-hermetic packaging are demonstrated. Designing the integrated lens of LISELs makes it possible to achieve passive alignment optical coupling to an SMF without the need for an additional lens. For SiP coupling, the light-emission angle from the LISEL can be controlled by the mirror angle and by displacing the lens. The capability for a low coupling loss of 3.9 dB between the LISEL and a grating coupler on the SiP platform was demonstrated. The LISEL with facet-free structure, integrating DBR mirror, PD, and window structure on its end facet, showed the same lasing performance as the conventional laser with AR facet coating. A storage test (200-hour saturated pressure-cooker test (PCT) at 138°C and 85% RH.) showed that the lasing characteristics did not degrade with high-humidity, demonstrating the potential for applying non-hermetic packaging. Our results indicate that the LISEL is one of the promising light sources for creating cost-effective OSAs.

Publication
IEICE TRANSACTIONS on Electronics Vol.E101-C No.7 pp.566-573
Publication Date
2018/07/01
Publicized
Online ISSN
1745-1353
DOI
10.1587/transele.E101.C.566
Type of Manuscript
Special Section INVITED PAPER (Special Section on Distinguished Papers in Photonics)
Category

Authors

Koichiro ADACHI
  Oclaro Japan, Inc.
Takanori SUZUKI
  Oclaro Japan, Inc.
Shigehisa TANAKA
  Oclaro Japan, Inc.

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