Abstract: A simple, compact and low-cost passive optical transceiver device with four terminals may be used in an optical transmission system with polarization-diversity coherent detection scheme. The transceiver is composed of a first polarization splitter/combiner, a non-reciprocal polarization rotator and a second polarization splitter/combiner. The device simultaneously operates as a transmitter and a receiver with optical signals propagating along opposite directions wherein non-reciprocal polarization rotation leads to distinct effects. The received optical signal is thus split into two orthogonal polarization components directed towards two separate ports.

Abstract: An optical isolator device with minimized polarization mode dispersion includes a first polarization splitter/combiner, a non-reciprocal polarization rotator and a second polarization splitter/combiner. Only forward propagation of light is allowed to propagate in the device, with backward optical signal blocked due to non-reciprocal polarization rotation. The optical paths of o-ray and e-ray are arranged to achieve equal optical path lengths, which makes polarization mode dispersion minimal to nonexistent. When symmetrically configured, both polarization mode dispersion (PMD) and polarization dependent loss (PDL) become zero in principle.

Abstract: The present invention discloses a bend control optimization method and system. The bend control optimization method includes: acquiring lateral motion data of a vehicle, where the lateral motion data includes a steering angle; determining a lateral acceleration according to the lateral motion data; determining a longitudinal acceleration pre-correction amount of the vehicle according to the lateral motion data and the lateral acceleration; determining a longitudinal acceleration correction amount according to the longitudinal acceleration pre-correction amount; and adjusting longitudinal acceleration of the vehicle according to the longitudinal acceleration correction amount to assist the vehicle to conduct bend driving.