公开(公告)号：US11860411B2

公开(公告)日：2024-01-02

申请号：US17980607

申请日：2022-11-04

申请人： Southwest Jiaotong University

发明人： Xihua Zou ,  Changjian Xie ,  Xiaojun Xie ,  Wei Pan ,  Lianshan Yan

IPC分类号： G02B6/12

CPC分类号： G02B6/12011 ,  G02B2006/12164

摘要： A super-compact arrayed waveguide grating (AWG) wavelength division multiplexer based on a sub-wavelength grating is provided and includes an input waveguide, a first planar waveguide, an arrayed waveguide, a second planar waveguide, and the output waveguide that are sequentially connected. The input waveguide has 1 port, and the output waveguide has 8 ports. The arrayed waveguide includes 50 equivalent uniform strip waveguides with the same length difference, and each of the equivalent uniform strip waveguides is configured as a sub-wavelength grating structure, thereby forming the effect of increasing group refractive index or transmission delay based on a slow light effect. The 8 channels with a channel spacing of 200 GHz have the minimum adjacent channel crosstalk of less than −27 dB, and the overall size is within 300×230 μm2. In the multiplexer, the overall integration size of the device is reduced by an order of magnitude.

公开(公告)号：US12101392B2

公开(公告)日：2024-09-24

申请号：US17518650

申请日：2021-11-04

申请人： Southwest Jiaotong University

发明人： Lianshan Yan ,  Lin Jiang ,  Yan Pan ,  Anlin Yi ,  Wei Pan

IPC分类号： H04L9/00 ,  H04L9/08 ,  H04L9/30 ,  H04L27/152

CPC分类号： H04L9/001 ,  H04L9/0858 ,  H04L9/3066 ,  H04L27/1525

摘要： A coherent detection-based high-speed chaotic secure transmission method includes: at a transmit terminal in a chaotic secure transmission system, optically coupling an optical chaotic carrier and transmission information by using an orthogonal basis to mask the transmission information by using a noise-like feature of the chaotic carrier, so as to obtain a chaotic masked signal; adding a fast phase disturbance and a fast polarization disturbance to the chaotic masked signal and transmitting the chaotic masked signal over an optical fiber transmission link; and at a receive terminal, obtaining the chaotic masked signal through coherent detection, compensating the chaotic masked signal for linear and nonlinear effects through digital signal processing, and using a polarization orthogonal basis- or phase orthogonal basis-based chaotic decryption algorithm to separate the chaotic carrier from the signal so as to complete decryption.