Polarization Rotation In Optical Fibers Research Articles

Optically Driven All-Fiber Polarization Rotator

We demonstrate an optically activated all-fiber polarization rotator based on polymer-azobenzene complexes. The azo compound (Disperse Red 1) was incorporated into a polymeric matrix (PDMS) using the guest-host technique and the resulting azopolymer was used as coating for tapered fiber devices. These photosensitive devices were then integrated in a fiber ring laser cavity, and the optically induced birefringence was monitored via changes in the polarization state of the fiber laser output. Our experimental results show that these azopolymer coated fiber devices provide a simple means for developing optically controlled polarization rotation in optical fibers.

Optically Efficient Nonlinear Signal Processing

Optical signal processing techniques employ a wide range of devices and various nonlinearities to achieve multiple network functionalities. The choice of nonlinearity can also impact the relative efficiency, both in terms of energy and material consumption, of the signal processing function being implemented. Techniques for some of the important functionalities, wavelength multicasting, wavelength-division multiplexing to time-division multiplexing, add-drop multiplexing, and wavelength exchange are compared in terms of the used optical spectrum, number of pumps required, and optical energy consumed. These include varieties of four-wave mixing, cross-phase modulation, Kerr-effect-based polarization rotation in optical fibers, and three-wave mixing in lithium niobate waveguides (WGs). Future possibilities of greener optical signal processing using on-chip WG technologies are discussed within the scope of recent developments in the dispersion tailored, highly nonlinear WGs.

利用光纤中的非线性偏振旋转效应提高激光脉冲对比度

利用光纤中的非线性偏振旋转效应提高激光脉冲对比度

Polarization rotation in optical fibers due to geometric path variance

The geometric rotation of polarization in single-mode optical fibers is investigated theoretically and experimentally. The measurement results are reported for polarization rotation due to geometric path variance of single-mode fibers with the input and output ends of fibers being nonparallel.