Spectral noise figure of Er sup 3 + -doped fiber amplifiers
- Bell Labs., Holmdel, NJ (USA)
Erbium-doped fiber amplifiers (EDFA) operating at 1.53 {mu}m are promising components for optical fiber communications owing to their high gains and low thresholds amenable to laser diode pumping. The important issue of noise figure NF as expressing the signal-to-noise ratio (SNR) degradation by the amplifier was addressed in a recent study, which showed that NF can be theoretically as low as 0.2 dB above the 3 dB quantum limit. For applications of Er-fiber amplifiers to wide-band wavelength-division multiplexed (WDM) systems, it is important to determine the spectral range where NF is close to this quantum-limited condition, as well as the pump power requirement to reach this limit. In this paper, the EDFA noise figure spectrum and its evolution under various pumping regimes is analyzed. It is shown that the fiber amplifier can actually be operated very near the 3 dB quantum limit ({+-} 0.15 dB) within a spectral range as broad as 50 nm.
- OSTI ID:
- 6857035
- Journal Information:
- IEEE Photonics Technology Letters (Institute of Electrical and Electronics Engineers); (USA), Vol. 2:3; ISSN 1041-1135
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
OPTICAL FIBERS
ERBIUM ADDITIONS
OPTICAL SYSTEMS
QUANTUM EFFICIENCY
COMMUNICATIONS
GAIN
OPTICAL PUMPING
SEMICONDUCTOR DIODES
ALLOYS
AMPLIFICATION
EFFICIENCY
ERBIUM ALLOYS
FIBERS
PUMPING
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
SEMICONDUCTOR DEVICES
440600* - Optical Instrumentation- (1990-)
360603 - Materials- Properties
657002 - Theoretical & Mathematical Physics- Classical & Quantum Mechanics