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Wavelength independent multimode interference coupler.
- Source :
-
Optics express [Opt Express] 2013 Mar 25; Vol. 21 (6), pp. 7033-40. - Publication Year :
- 2013
-
Abstract
- We propose an ultra-broadband multimode interference (MMI) coupler with a wavelength range exceeding the O, E, S, C, L and U optical communication bands. For the first time, the dispersion property of the MMI section is engineered using a subwavelength grating structure to mitigate wavelength dependence of the device. We present a 2 × 2 MMI design with a bandwidth of 450nm, an almost fivefold enhancement compared to conventional designs, maintaining insertion loss, power imbalance and MMI phase deviation below 1dB, 0.6dB and 3°, respectively. The design is performed using an in-house tool based on the 2D Fourier Eigenmode Expansion Method (F-EEM) and verified with a 3D Finite Difference Time Domain (FDTD) simulator.
Details
- Language :
- English
- ISSN :
- 1094-4087
- Volume :
- 21
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Optics express
- Publication Type :
- Academic Journal
- Accession number :
- 23546086
- Full Text :
- https://doi.org/10.1364/OE.21.007033