Oerlikon Contraves Ag

Vetco Gray Controls Limited

Etienne Rochat

Karim Haroud

Jean-Michel Mayor

Rene Dändliker

A fiber laser sensor has a fiber laser (FL) with two reflectors in the form of a first and a second Bragg grating () and a fiber segment () arranged in between. The first Bragg grating () is arranged in a temperature-sensitive fashion. The second Bragg grating is a chirped Bragg grating () whose central wavelength is stabilized with regard to temperature changes. By means of this sensor, temperature and pressure can simultaneously be measured separately from one another, beat frequencies of orthogonal polarization eigenmodes of the fiber laser (FL) being a measure of the pressure and beat frequencies of longitudinal modes being a measure of the temperature.

Fiber laser sensor

The instant invention relates to a method and an arrangement for the space-based operation of quantum-optical amplifiers embodied as optical waveguides, while taking the special conditions to be found in space into consideration. An amplifier housing 2 filled with nitrogen has a cutout into which a plan-parallel quartz glass plate 4 has been fitted, through which light beams can enter and leave the housing. The amplifier housing 2 rests on heat-insulating supports 3a, 3b and is temperature-stabilized by a Peltier element 5. The amplifier housing 2 is filled with nitrogen in order to achieve operating conditions similar to those on earth.

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Essex, United Kingdom

Etienne Rochat