fibre alignment process in order to turn
the optical transmission path through 90 degrees.
The nominal difference in the sensing
cavity lengths is produced by manufacturing the sensor
in two halves. Each half is aligned separately and
the fibre end faces polished before the two
subcomponents are joined.
A series of optical coating ensures that
there is minimal insertion loss to the sensor signals in
both the forward and reverse directions.
The dual cavity sensor has a major
diameter of only 8mm and is 2mm thick. Sensor can be
manufactured from either large-core multimode, standard
communications grade multimode or singlemode optical