Title :
Optimization of large-scale fiber sensor arrays incorporating multiple optical amplifiers. Part II: pump power
Author :
Hodgson, Craig W. ; Wagener, Jefferson L. ; Digonnet, Michel J F ; Shaw, Herbert J.
Author_Institution :
Litton Guidance & Control Syst., Woodland Hills, CA, USA
fDate :
2/1/1998 12:00:00 AM
Abstract :
For part I see, ibid., p. 218, 1998. We discuss how to minimize the pump power required for large-scale fiber sensor arrays employing erbium-doped fiber amplifier (EDFA) telemetry with respect to the number of amplifiers per bus, number of sensors per rung, and the gain per amplifier. For a large array, the pump power requirement is dominated by passive component losses along the array. We investigate several methods, including alternative array topologies, to reduce the power requirement while minimizing the impact on the signal-to-noise ratio (SNR). We define an optimum topology which requires less than 1 W of 1480 nm pump power per bus to support 200 high sensitivity (1 μrad/√(Hz)) sensors on a pair of fiber buses, a power requirement that is reasonable and attainable with available laser diodes
Keywords :
arrays; fibre lasers; fibre optic sensors; optical pumping; optimisation; sensitivity; telemetry; time division multiplexing; 1 W; 1480 nm; amplifier gain; amplifier telemetry; array topologies; erbium-doped fiber amplifier; high sensitivity; large-scale fiber sensor arrays optimisation; laser diodes; multiple optical amplifiers; optimum topology; passive component losses; pump power; pump power requirement; signal-to-noise ratio; Diode lasers; Erbium-doped fiber amplifier; Large-scale systems; Laser excitation; Optical fiber sensors; Power amplifiers; Sensor arrays; Signal to noise ratio; Telemetry; Topology;
Journal_Title :
Lightwave Technology, Journal of