Back to Search
Start Over
Mode-evolution-based polarization rotator-splitter design via simple fabrication process
- Source :
- Optics Express. 20:10163
- Publication Year :
- 2012
- Publisher :
- The Optical Society, 2012.
-
Abstract
- A mode-evolution-based polarization rotator-splitter built on InP substrate is proposed by combining a mode converter and an adiabatic asymmetric Y-coupler. The mode converter, consisting of a bi-level taper and a width taper, effectively converts the fundamental TM mode into the second order TE mode without changing the polarization of the fundamental TE mode. The following adiabatic asymmetric Y-coupler splits the fundamental and the second order TE modes and also converts the second order TE mode into the fundamental TE mode. A shallow etched structure is proposed for the width taper to enhance the polarization conversion efficiency. The device has a total length of 1350 µm, a polarization extinction ratio over 25 dB and an insertion loss below 0.5 dB both for TE and TM modes, over the wavelength range from 1528 to 1612 nm covering all C + L band. Because the device is designed based on mode evolution principle, it has a large fabrication tolerance. The insertion loss remains below 1 dB and the polarization extinction ratio remains over 17 dB with respect to a width variation of +/- 0.12 µm at the wavelength of 1570 nm, or +/- 0.08 µm over the entire C + L band.
- Subjects :
- L band
Materials science
Polarization rotator
Extinction ratio
Phosphines
business.industry
Energy conversion efficiency
Equipment Design
Surface Plasmon Resonance
Polarization (waves)
Indium
Atomic and Molecular Physics, and Optics
Transverse mode
Equipment Failure Analysis
Refractometry
Optics
Polarization mode dispersion
Insertion loss
business
Subjects
Details
- ISSN :
- 10944087
- Volume :
- 20
- Database :
- OpenAIRE
- Journal :
- Optics Express
- Accession number :
- edsair.doi.dedup.....3c128559d3e936ea398140ca2c2223a4