Noise measurement for optical amplifier and a system therefor

Details Noise measurement for optical amplifier and a system therefor Noise measurement for optical amplifier and a system therefor

1995-02-13

1996-05-28

Hellner, Mark

Optical: systems and elements

Optical amplifier

Correction of deleterious effects

359341, 359110, 359177, H01S 300

Patent

active

055217516

ABSTRACT:
A method and a system for measuring a noise figure of an optical amplifier which independently detects two different output powers generated from the optical amplifier under measurement. The generation of the first output power is in synchronization with a space period of an input optical pulsed signal, while the generation of the second output power is in synchronization with the mark period of the input optical pulsed signal. The-optical pulsed signal is an intensity-modulated signal given at a repetition period which is sufficiently shorter than the life time of carriers or the life time of ions in a metastable level of the optical amplifier under measurement.

REFERENCES:
patent: 4947134 (1990-08-01), Olsson
patent: 4947459 (1990-08-01), Nelson et al.
patent: 5295015 (1994-03-01), Yoneyama
EEOC'93 Tu3, vol. 2, (1993) "Comparison Of Noise Figure Measurement Methods For Erbiam Doped Fiber Amplifiers", S. Nishi et al.
OFV'92 ThE1 (1992) "Accurate Noise Figure Measurements Of Erbium-Doped Fiber Amplifiers in Saturation Conditions", J. Aspen et al.
ECOC'92, vol. 1, (1992), p. 509, "Pulsed-Source Technique For Optical Amplifier Noise Figure Measurement", D. M. Bney et al.
Technical Digest, (1993) pp. 105-108, "Noise Figure Measurement of Erbium-Doped Fibers Amplifiers With A Pulsed Signal Source", Klar et al.
IEEE Photonics Technology Letters, vol. 5, No. 12, Dec. 1993, pp. 1436-1438, "Noise-Figure Monitoring of a Cascaded In-Line Erbium-Doped Fiber Amplifier", H. Masuda et al.

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