Simple Phase Control System in Bidirectional Ring Laser

Yoshitaka Takahashi; Yong Qian Li

doi:10.4028/www.scientific.net/KEM.698.55

Paper Titles

Effect of the Introduction of a CF₃ Group to a Silyl-Anchor Azobenzene Dye on Sensitization Property in Dye-Sensitized Solar Cells
p.27

Effect of Humidity and Bias on the Size of Nanostructures Fabricated by STM Anodization and its Application to Patterns
p.35

Effect of Embedded TiO₂ in Carbon Nanofiber Support on Pd Catalyst Activity for Formic Acid Oxidation
p.41

Enhanced Catalytic Activity of Pt for Electrooxidation of Ethanol by Using Silica-Carbon Composite as the Catalyst Support
p.47

Simple Phase Control System in Bidirectional Ring Laser
p.55

Photoluminescence and Electroluminescence Properties of (Ca,Sr)TiO₃:Er
p.60

Improved Method of Direct Measurement of the First-Order Mass Moments of Human Body Segments
p.69

Measurement of Dynamic Responses of a Force Sensor against Small Impact Forces with Various Durations
p.73

Impact Response Measurement of Bamboo Shinai and CFRP Shinai
p.80

HomeKey Engineering MaterialsKey Engineering Materials Vol. 698Simple Phase Control System in Bidirectional Ring...

Simple Phase Control System in Bidirectional Ring Laser

Abstract:

Optical sensors are commonly used and most of them detect the variation of light intensity and then if there is the uctuation of light source intensity or change in propagation loss it causes measurement errors. A ring laser sensor is one of the potential candidates which are insensitive to such uctuation, but it has mainly two problems. One is lock-in effect and the other is insensitiveness to detect the sign (polarity) of the sensing signal. To solve these problems a new phase control system has been proposed. It consists of two polarizers, two quarter-wave plates, and one Faraday rotator. Using this system the phase is controlled by the simultaneous rotation of two quarter-wave plates.