scispace - formally typeset
Search or ask a question
Topic

Extinction ratio

About: Extinction ratio is a research topic. Over the lifetime, 8541 publications have been published within this topic receiving 111908 citations.


Papers
More filters
Journal ArticleDOI
TL;DR: A method for miniaturization of filters based on curved waveguide Bragg gratings, so that long structures can be packed into a small area on a chip, which eliminates the stitching errors introduced in the fabrication process.
Abstract: We propose a method for miniaturization of filters based on curved waveguide Bragg gratings, so that long structures can be packed into a small area on a chip. This eliminates the stitching errors introduced in the fabrication process, which compromise the performance of long Bragg gratings. Our approach relies on cascading curved waveguide Bragg gratings with the same radius of curvature. An analytical model for the analysis of these devices was developed, and a filter based on this model was designed and fabricated in a silicon on insulator platform. The filter had a total length of 920μm, occupied an area of 190μm×114μm, and exhibited a stop band of 1.7nm at 1.55μm and an extinction ratio larger than 23dB.

44 citations

Journal ArticleDOI
TL;DR: An ultra-broadband high-performance polarization beam splitter (PBS) based on silicon-on-insulator (SOI) platform based on a directional coupler consisting of a 70-nm taper-etched waveguide and a slot waveguide, the structure of which is suitable for a commercial two-step fabrication process.
Abstract: In this paper, we experimentally demonstrate an ultra-broadband high-performance polarization beam splitter (PBS) based on silicon-on-insulator (SOI) platform. The proposed device is based on a directional coupler consisting of a 70-nm taper-etched waveguide and a slot waveguide with a compact coupling length of 11 microns, the structure of which is suitable for a commercial two-step fabrication process. Benefiting from the preferences of coupling TM mode to slot waveguide and restricting TE mode in taper-etched waveguide, the polarization extinction ratios (PER) for TE and TM polarizations can reach as high as 30 dB and 40 dB at 1550 nm based on experimental results, respectively; besides, an ultra-wide operation bandwidth with PER >20 dB is achieved as ~175 nm from 1450 nm to 1625 nm (covering S, C and L bands), or the bandwidth with PER >25 dB is over ~120 nm from 1462 nm to 1582 nm, which is the largest operation bandwidth to the best of our knowledge. At last, the insertion losses (IL) are −0.17 dB and −0.22 dB for TE and TM polarizations at 1550 nm, respectively.

44 citations

Journal ArticleDOI
TL;DR: In this paper, the authors demonstrate monolithic integration of a 100-channel arrayed-waveguide grating (AWG) with 10GHz channel spacing and 100 optically controlled Michelson-interferometer-based phase and amplitude modulators.
Abstract: We demonstrate monolithic integration of a 100-channel arrayed-waveguide grating (AWG) with 10-GHz channel spacing and 100 optically controlled Michelson-interferometer-based phase and amplitude modulators. The high-resolution AWG showed better than -15-dB crosstalk, and the modulator extinction ratio was better than 20 dB with either electrical or optical modulation control. The twin-integrated devices comprise a 50-mm diameter InP wafer with 1200 independent optoelectronic components.

44 citations

Journal ArticleDOI
TL;DR: In this article, all-optical simultaneous half-addition and half-subtraction of two return-to-zero on-off keying data streams using only two semiconductor optical amplifiers and without any assist light was demonstrated.
Abstract: We propose and demonstrate all-optical simultaneous half-addition and half-subtraction of two return-to-zero on-off keying data streams using only two semiconductor optical amplifiers and without any assist light In the experimental demonstration, we realize the arithmetic functions with an extinction ratio larger than 14 dB and achieve error-free signal processing at the repetition rate of 10 Gbit/s

44 citations

Journal ArticleDOI
TL;DR: A simple and effective method for the postfabrication trimming of optical microresonators by photobleach CLD-1 chromophores to tune the resonance wavelengths of polymer microring resonator optical notch filters.
Abstract: We present a simple and effective method for the postfabrication trimming of optical microresonators. We photobleach CLD-1 chromophores to tune the resonance wavelengths of polymer microring resonator optical notch filters. A maximum wavelength shift of ~8.73 nm is observed. The resonators are fabricated with a soft-lithography molding technique and have an intrinsic Q value of 2.6 x 10^4 and a finesse of 9.3. The maximum extinction ratio of the resonator filters is ~34 dB, indicating that the critical coupling condition has been satisfied.

44 citations


Network Information
Related Topics (5)
Photonic crystal
43.4K papers, 887K citations
92% related
Optical fiber
167K papers, 1.8M citations
92% related
Resonator
76.5K papers, 1M citations
86% related
Plasmon
32.5K papers, 983.9K citations
85% related
Diode
71.5K papers, 812.4K citations
85% related
Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023187
2022429
2021371
2020449
2019468
2018441