期刊
JOURNAL OF LIGHTWAVE TECHNOLOGY
卷 39, 期 1, 页码 154-161出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2020.3026170
关键词
Three-dimensional displays; Polymers; Photonics; Laser beams; Optical fibers; 3D beam splitter; direct laser writing; IP-Dip polymer; polydimethylsiloxane
资金
- Austrian Agency for International Cooperation in Education and Research (OeAD-GmbH) [SK16/2018]
- Slovak Research and Development Agency of Ministry of Education, Science, Research and Sport of the Slovak Republic [SK-AT-2017-0013, APVV-16-0129]
A new concept of 3D polymer-based 1 x 4 beam splitter for wavelength splitting around 1550 nm was developed and realized, showing high splitting ratio for single-mode and multi-mode operation with low losses. The splitter was fabricated using direct laser writing process and demonstrated efficient coupling to standard single-mode fiber.
We present a new concept of 3D polymer-based 1 x 4 beam splitter for wavelength splitting around 1550 nm. The beam splitter consists of IP-Dip polymer as a core and polydimethylsiloxane (PDMS) Sylgard 184 as a cladding. The splitter was designed and simulated with two different photonics tools and the results show high splitting ratio for single-mode and multi-mode operation with low losses. Based on the simulations, a 3D beam splitter was designed and realized using direct laser writing (DLW) process with adaptation to coupling to standard single-mode fiber. With respect to the technological limits, the multi-mode splitter having core of (4 x 4) mu m(2) was designed and fabricated together with supporting stable mechanical construction. Splitting properties were investigated by intensity monitoring of splitter outputs using optical microscopy and near-field scanning optical microscopy. In the development phase, the optical performance of fabricated beam splitter was examined by splitting of short visible wavelengths using red light emitting diode. Finally, the splitting of 1550 nm laser light was studied in detail by near-field measurements and compared with the simulated results. The nearly single-mode operation was observed and the shape of propagating mode and mode field diameter was well recognized.
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