Haiyan Chen

Optical generation of millimeter-wave based on single-mode fiber ring cavity

In this paper, a novel optical generation of millimeter waves based on the birefringence in a single-mode fiber ring cavity is proposed and investigated theoretically. The input pulsed laser stimulates two orthogonal eigen-modes in a single-mode fiber ring cavity, the birefringence of single-mode fiber causes a phase mismatch for the two eigen-modes, this phase mismatch leads the generation of millimeter waves, out of the ring cavity a pigtail polarizer is used to combine the two eigen-modes, and then the millimeter wave signal is obtained by using heterodyne method. The effects of straight- through coupling coefficients, phase delay factor, and refractive index difference on millimeter wave signal are discussed.

Hybrid Filter Based on Long-Period Waveguide Grating and Multilayer Medium Thin Film for Broadband Waveguide Amplifiers

A hybrid optical filter based on long-period waveguide grating and multilayer medium thin film is proposed. The effects of the transmission spectra of the filter on the amplified spontaneous emission spectrum of Er-Yb codoped phosphate glass waveguide amplifiers are discussed. Its demonstrated that the flatness of below 0.5dB is achieved over a bandwidth of ~ 30 nm.

Self-phase modulation in a nonlinear single-mode fiber Fabry-Pérot cavity with high intensity pulsed laser injection

In this paper, we propose a nonlinear single-mode fiber FP cavity, in which CRDS is researched theoretically, and the relationship expression between output electric field amplitude and nonlinear phase shift is derived. Numerical results demonstrate that the output performance of nonlinear single-mode fiber Fabry–Perot cavity includes three phases: build-up, stability, and ring-down phase, output power is inversely proportional to the power in the cavity, when the power in cavity is larger than 2W, the stable time for output signal with instability becomes longer, but the effect of self-phase modulation on CRD time is ignoring.