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Visiting Industrial Fellows
Dr. Guan-Lin Su

Electrical Engineering
Advisor: Prof. Wu
Research Interests: III-V and III-N semiconductor quantum structures, semiconductor lasers (VCSELs, DFB lasers, and tunable lasers), optoelectronics and integrated photonics.
Job Interests: Academic, industry R&D.

Guan-Lin Su received his B.S. in electronics engineering from National Chiao Tung University, Hsinchu, Taiwan in 2011, and M.S. and Ph.D. from the University of Illinois at Urbana-Champaign, Urbana in 2014 and 2016, respectively. He is currently a postdoctoral fellow at the University of California, Berkeley.

His research area of interest covers modeling of semiconductor lasers (VCSELs, DFB lasers, and tunable lasers), III-N and III-V quantum structures (quantum wells, dots, and superlattices), and passive components for optical communications and integrated photonics.

Broadly-Tunable Laser with Self-Imaging Three-Branch Multi-Mode Interferometer [BPN856]
Tunable lasers with high SMSRs are cost-effective solutions to replace multiple DFB
lasers as the light source for WDM systems. Interferometer- based lasers, such as C3 and Y-
lasers, have advantages over grating- and ring-resonator-based lasers in terms of cost and
fabrication complexities; however, a large optical path difference between the two arms is
required for high SMSRs but it defeats the Vernier effect and reduces the wavelength tuning
range. In our proposed three-branch MMI laser, two tuning arms with similar lengths ensure a
wide tuning range, and an additional long arm provides extra optical interference and increases
the SMSR. In this project, our designed laser can be optimized to be single-mode across the
entire C-band, and the use of a self-imaging MMI avoids additional losses that would
potentially increase the threshold. Based on our simulation, the laser wavelength of the
device can be electrically tuned over 30 nm with a 100-GHz ITU channel spacing. It is
expected that, upon the completion of the project, the developed tunable laser can serve as a
low-cost solution for datacom and telecom applications.

Current Active Projects:

     Last Updated: Mon 2018-Jan-29 16:41:17

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