Patent ID: 7809273

Claim:
A system including a chamber having an internal environment different from an external environment, the system comprising: a plurality of generators disposed outside of the chamber and each configured to generate a plurality of light waves; a transmission line disposed through a partition wall of the chamber and configured to transmit a light wave therethrough; a plurality of measurement units disposed inside of the chamber and each configured to direct a plurality of light waves to an associated measurement region and to receive a plurality of light waves from the associated measurement region; a first multiplexer/demultiplexer disposed outside of the chamber and configured (i) to multiplex a plurality of light waves generated by the plurality of generators to generate first multiplexed light waves, (ii) to send the first multiplexed light waves to the transmission line, and (iii) to demultiplex second multiplexed light waves received from the transmission line to generate first demultiplexed light waves; a second multiplexer/demultiplexer disposed inside of the chamber and configured (i) to demultiplex the first multiplexed light waves received from the transmission line to generate second demultiplexed light waves, (ii) to send the second demultiplexed light waves, as the plurality of light waves to be respectively directed by the plurality of measurement units to the regions, (iii) to multiplex the plurality of light waves respectively received by the plurality of measurement units from the regions, to generate the second multiplexed light waves, and (iv) to send the second multiplexed light waves to the first multiplexer/demultiplexer via the transmission line; and a plurality of signal processors disposed outside of the chamber and each configured to receive the first demultiplexed light waves that correspond to the plurality of light waves respectively received by the plurality of measurement units from the regions, and to perform respective signal processing for the measurements.