Common mistake:theoretical justification and remedial inflexibility

Discusses the implications for the doctrine of common mistake of the Court of Appeal ruling in Great Peace Shipping Ltd v Tsavliris Salvage (International) Ltd on whether a contract for the hire of a ship was void on the ground of common mistake regarding the position of the ship. Reviews the origins of the doctrine of common mistake and the relationship between the doctrine and the implication of terms. Considers the determination of impossibility. Examines the role of equity in common mistake and remedial equitable intervention.

In-fiber linear polarizer based on UV-inscribed 45° tilted grating in polarization maintaining fiber

We report an in-fiber linear polarizer structured by UV-inscribing a 45° tilted fiber grating (TFG) into polarization maintaining (PM) fiber along its principal axis. The polarization extinction ratio (PER) achieved by a 48 mm long 45° TFG has reached 46 dB at 1550 nm and the overall PER is >40 dB over a 50 nm wavelength range. Such 45° TFG based polarizers have many advantages over conventional products, including low loss, low cost, simple fabrication process, and no physical modification to the fiber, thus offering high stability and capable of handling high power.