- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
Polarization diversity circuit based on silica waveguides and photonic crystal waveplates for a 4??4 silicon optical switch
摘要： We propose a compact polarization diversity circuit for a silicon waveguide device. It consists of silica waveguides and photonic crystal waveplates, and can convert input light with various polarization states into two output light signals with the same polarization. Setting these circuits at the front and rear of two silicon optical switches, the polarization dependence in the switch can be dramatically suppressed. We fabricated polarization diversity circuits for a 4×4 silicon optical switch and realized a polarization insensitive 4×4 optical switch. The polarization dependent loss was reduced to 1.1 dB and the polarization dependent crosstalk was less than ?17 dB.
关键词： silicon photonics,polarization diversity circuit,optical switch
更新于2025-09-16 10:30:52
-
All-Optical Ultra-Fast Graphene-Photonic Crystal Switch
摘要： In this paper, an all-optical photonic crystal-based switch containing a graphene resonant ring has been presented. The structure has been composed of 15 × 15 silicon rods for a fundamental lattice. Then, a resonant ring including 9 thick silicon rods and 24 graphene-SiO2 rods was placed between two waveguides. The thick rods with a radius of 0.41a in the form of a 3 × 3 lattice were placed at the center of the ring. Graphene-SiO2 rods with a radius of 0.2a were assumed around the thick rods. These rods were made of the graphene monolayers which were separated by SiO2 disks. The size of the structure was about 70 μm2 that was more compact than other works. Furthermore, the rise and fall times were obtained by 0.3 ps and 0.4 ps, respectively, which were less than other reports. Besides, the amount of the contrast ratio (the di?erence between the margin values for logics 1 and 0) for the proposed structure was calculated by about 82%. The correct switching operation, compactness, and ultra-fast response, as well as the high contrast ratio, make the presented switch for optical integrated circuits.
关键词： optical switch,photonic crystal,graphene,photonic band gap,kerr e?ect
更新于2025-09-12 10:27:22
-
[IEEE 2018 Asia Communications and Photonics Conference (ACP) - Hangzhou (2018.10.26-2018.10.29)] 2018 Asia Communications and Photonics Conference (ACP) - All-optical Phase Shifter and Switch Based on Microfiber Coated with Colloidal Quantum Dots
摘要： We propose an all-optical phase shifter and switch based on a microfiber coated with colloidal quantum dots, phase shift up to 5.95π is achieved, and the pump-controlled optical switch has an extinction ratio of 13dB.
关键词： optical switch,optical phase shifter,colloidal quantum dots
更新于2025-09-11 14:15:04