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Journal Article
Low-Loss Single-Mode Operation in Silicon Multi-Mode Arrayed Waveguide Grating with a Double-Etched Inverse Taper Structure
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- Authors
- Jaegyu Park, Myung-Joon Kwack, Jiho Joo, Gyungock Kim
- Issue Date
- 2017-07
- Citation
- Journal of Optics, v.19, no.8, pp.1-7
- ISSN
- 2040-8978
- Publisher
- Institute of Physics (IOP)
- Language
- English
- Type
- Journal Article
- Abstract
- We investigate the single-mode operation in a silicon arrayed multi-mode waveguide grating. By introducing a double-etched structure at the boundary of a star coupler with inverse-tapered waveguides (WGs), the suppression of the mode-coupling between adjacent arrayed multi-mode WGs, and the adiabatic optical mode conversion between a FPR (free propagation region) and arrayed WGs can be achieved with a reduced phase error of the arrayed WGs. The fabricated four-channel Si arrayed waveguide grating (AWG) demonstrates a good performance level, such as a low insertion loss of 0.61 dB (0.73 dB) and low adjacent crosstalk less than -31.3 dB (-32.2 dB) for transverse-electric (TE) (transverse-magnetic, TM) polarization, in the range of ~1300 nm wavelength.
- KSP Keywords
- Four-Channel, Free Propagation Region(FPR), Multi-mode, Performance levels, Single-mode operation, Taper structure, arrayed waveguide grating(AWG), low insertion loss, low loss, mode conversion, mode coupling