scholarly journals Polarization Splitter-Rotator Based on Multimode Waveguide Grating

Crystals ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 1170
Author(s):  
Yannong Luo ◽  
Renyou Ge ◽  
Haozhi Luo ◽  
Meiyan Wu ◽  
Lidan Zhou ◽  
...  
Keyword(s):  
Insertion Loss ◽  
Extinction Ratio ◽  
Silicon On Insulator ◽  
Multimode Waveguide ◽  
Polarization Conversion ◽  
Polarization Diversity ◽  
Polarization Splitter ◽  
Waveguide Grating ◽  
Design Flexibility ◽  
Bloch Mode

We demonstrate a polarization splitter rotator (PSR) based on multimode waveguide grating (MWG) on a silicon-on-insulator (SOI) platform. Bloch mode hybridization in mini-stopband is exploited to achieve high polarization conversion efficiency. The fabricated device yields a high extinction ratio of > 53 dB and > 31 dB, low crosstalk of < −26.4 dB and < −40 dB for the injected TE0 and TM0 mode, with average insertion loss of 1.2 dB and 1.5 dB in the wavelength regime 1552 nm–1562 nm. Such a device shows great design flexibility and an easy fabrication process, serving as a good candidate in integrated polarization diversity circuits, especially for applications requiring spectra manipulation. Additionally, the polarization conversion approach provides opportunities to develop novel polarization management devices.

scholarly journals Optimal Design of an Ultrasmall SOI-Based 1 × 8 Flat-Top AWG by Using an MMI

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Hongqiang Li ◽  
Yaoting Bai ◽  
Xiaye Dong ◽  
Enbang Li ◽  
Yang Li ◽  
...  
Keyword(s):  
Insertion Loss ◽  
Spectral Response ◽  
Beam Propagation Method ◽  
Silicon On Insulator ◽  
Optimized Design ◽  
Arrayed Waveguide Grating ◽  
Channel Spacing ◽  
Waveguide Grating ◽  
Passband Width ◽  
Arrayed Waveguide

Four methods based on a multimode interference (MMI) structure are optimally designed to flatten the spectral response of silicon-on-insulator- (SOI-) based arrayed-waveguide grating (AWG) applied in a demodulation integration microsystem. In the design for each method, SOI is selected as the material, the beam propagation method is used, and the performances (including the 3 dB passband width, the crosstalk, and the insertion loss) of the flat-top AWG are studied. Moreover, the output spectrum responses of AWGs with or without a flattened structure are compared. The results show that low insertion loss, crosstalk, and a flat and efficient spectral response are simultaneously achieved for each kind of structure. By comparing the four designs, the design that combines a tapered MMI with tapered input/output waveguides, which has not been previously reported, was shown to yield better results than others. The optimized design reduced crosstalk to approximately −21.9 dB and had an insertion loss of −4.36 dB and a 3 dB passband width, that is, approximately 65% of the channel spacing.

Low insertion loss and high extinction ratio analysis of a new surface plasmon resonance based photonic crystal fiber filter

Optik ◽  
2019 ◽  
Vol 194 ◽  
pp. 163069 ◽  
Author(s):  
Kawsar Ahmed ◽  
Md. Ferdous ◽  
Md. Nazmul Hossen ◽  
Bikash Kumar Paul ◽  
I.S. Amiri ◽  
...  
Keyword(s):  
Surface Plasmon Resonance ◽  
Photonic Crystal ◽  
Photonic Crystal Fiber ◽  
Surface Plasmon ◽  
Insertion Loss ◽  
Plasmon Resonance ◽  
Extinction Ratio ◽  
Ratio Analysis ◽  
Crystal Fiber ◽  
Low Insertion Loss

scholarly journals SOI multimode waveguide bend with radially bridged SWGs for broadband (de)multiplexing -INVITED

2021 ◽  
Vol 255 ◽  
pp. 01003
Author(s):  
Kevan K. MacKayt ◽  
Winnie N. Ye
Keyword(s):  
Effective Radius ◽  
Silicon On Insulator ◽  
Propagation Loss ◽  
Multimode Waveguide ◽  
Broad Bandwidth ◽  
Subwavelength Grating ◽  
Mode Division Multiplexing ◽  
Design Choice ◽  
Design Freedom ◽  
Waveguide Bend

A novel broadband multimode waveguide bend is proposed that supports the propagation of multiple TE modes on a silicon-on-insulator platform. The gradient curvature bend utilizes trapezoidal subwavelength grating (SWG) segments, connected by adiabatically tapered radial strips to achieve efficient mode (de)multiplexing. The inclusion of the radial strips offers an extra degree of design freedom, allowing the realization of a multimode bend with only one single full etch step. The access waveguide has a width of 2.075 μm with an effective radius of 10 μm. Propagation loss for all modes remains below 2.96 dB, and intermodal crosstalk has a maximum of -19 dB across a broad bandwidth of 100 nm, centred at 1550 nm. This work presents an excellent design choice for broadband mode-division multiplexing operations.

Sign in / Sign up

Export Citation Format

Share Document