This paper proposes a novel two-dimensional photonic crystal-based 8-QAM signal
demodulator with a unique combination of nonlinear cavities and line defects. It consists of …

This paper designs a 1× 2 switchable dual-mode optical 90° hybrid device on the silicon-on-
insulator (SOI) platform for the mode division multiplexing hybridized coherent transmission …

We design a broadband free space 2× 4 90° optical hybrid over a spectral window of 1000–
1200 nm and 1470–1650 nm and verify the feasibility of the scheme experimentally. The …

We propose and fabricate a scheme that combines a two-dimensional (2D) grating coupler
and a delay interferometer (DI) in a loop configuration. According to the polarization states …

We propose and fabricate a novel circuit that combines two two-dimensional (2D) grating
couplers and a microring resonator (MRR). According to the polarization states, one 2D …

We design an ultracompact, broadband, and low-loss 90-deg optical hybrid coupler using a
silicon-on-insulator (SOI) material platform for coherent receivers in optical communication …

In this paper, we propose a novel scheme to integrate an optical hybrid based on standing
wave with graphene photodetector (GPD). Different from optical hybrids based on multimode …

We experimentally demonstrate a demodulation scheme for 20 Gbaud/s nonreturn-to-zero
differential quadrature phase-shift keying signals using a silicon microring resonator. Either …

This paper presents a novel all-optical switch based on multi-mode interference (MMI) and
Mach–Zehnder (MZ) using self-imaging principle and optical Kerr effect of organic polymer …

This paper presents a novel quadrature phase-shift keying (QPSK) signal demodulator that
combines the graphene photodetector with symmetrical electrodes and an optical hybrid …