IEEE Photonic
Society Distinguished Speaker Seminar:
The Art and
Science of Packaging High-Coupling Photonics Devices and Modules
By Dr. Wood-Hi Cheng, Fellow of
IEEE, OSA, and SPIE.
Department of Photonics,
National Sun Yat-sen University, Kaohsiung, 804 Taiwan
Event Date: 2013, Jan. 31
Time: 11:00 am -12:00 pm
Location: CREOL 102, University of Central
Florida
Address:
CREOL, University of Central Florida
4000 Central
Florida Blvd. Orlando, FL, 32816
Bio:
Wood-Hi Cheng received the Ph.D. degree in
physics from Oklahoma State University, Stillwater, in 1978. He is a Chair
Professor at National Sun Yat-sen University, Kaoshiung, Taiwan, where he
founded and became the Director of the Institute of Electro-Optical Engineering
(1994-2000), and Dean of College Engineering (2002-2005). In 2007 he chaired
the Southern Taiwan Opto-Electronics Center of Excellence. He was a Program
Director of Optoelectronics in the National Science Council (2009-2011) of
Taiwan providing research grants and direction.
Professor Cheng¡¯s research and development is contributions
to photonic package technology, including high-speed laser module packaging,
high-coupling devices and modules packaging employing automated process,
passively mode-locked fiber lasers employing carbon nanotubes or graphene,
high-reliability glass-doped phosphor-converted high-power white-light-emitting
diodes, and 300-nm ultrabroadband Cr-doped fiber amplifiers. Prof. Cheng¡¯s most
significant R&D is the demonstration of record ultra-broadband 300-nm
Cr-doped fibers (CDFs). The CDFs have been used for the first time as a
broadband Cr-doped fiber amplifier (CDFA) for use in a 40-Gb/s error-floor free
data fiber-optic transmission.
Prof. Cheng is a Fellow of IEEE, OSA, and
SPIE. He served as a Chair for the IEEE Photonics Society, Taipei Chapter,
during 1999¨C2000, and served as a Chair for the OSA, Taipei Chapter during
2005¨C2006. He was recipient of the IEEE Photonics Engineering Achievement Award
in 2010 for his contributions to design, development and commercialization
compact solid-state laser modules, and the 2011-2013 IEEE Photonics Society
Distinguished Lecturer Award.
Summary:
A new scheme of hyperboloid microlens (HM)
employing automatic grinding and precise fusing techniques to achieve
high-average and high-yield coupling efficiency from high-power 980-nm lasers
into single mode fibers is proposed and demonstrated. The fiber endface of the
HM exhibited a double-variable curvature in the major and minor axes which was
characterized as a hyperboloid. By selecting half transverse length of the
hyperbola and using fusing process to precise and quantitative controlling the
required minor radius of curvature within 2.4 - 2.8 mm and offset within 0.8
mm, the HMs exhibited a high-average coupling efficiency of 83%. This study
demonstrates that the proposed HMs through both automatic grinding and precise
fusing techniques can achieve high-average and high-yield coupling efficiency
better than any other grinding techniques to form asymmetric microlenses for
utilizing in many low-cost lightwave interconnection applications. From art (or
engineering) point of view, we are able to fabricate any kinds of perfect fiber
microlenses.
Mode (spot size and phase front) mismatch
between the laser diodes and single-mode fibers (SMFs) can lead to a
significant insertion loss. A direct near-field phase and intensity measurement
in diode lasers, SMFs, and HMs is demonstrated by employing a SMF
interferometer. From science point of view, detailed understanding of the
near-field phase and intensity distributions of light sources and optical
components are essential for designs of microoptics with better mode matching
to minimize the insertion loss.
For more information:
Jie Sun
IEEE
Photonic Society
Website:
ieee.creol.ucf.edu