High power lightwave transmitter using highly saturated amplifie

Details High power lightwave transmitter using highly saturated amplifie High power lightwave transmitter using highly saturated amplifie

1994-12-29

1995-12-19

Pascal, Leslie

Optical: systems and elements

Deflection using a moving element

Using a periodically moving element

359173, 359179, 359334, 372 26, H04B 1004, H04B 1017

Patent

active

054773687

ABSTRACT:
Stimulated Brillouin scattering has been effectively suppressed and the effect of residual amplitude modulation has been mitigated in a dithered optical transmitter by injecting the dithered optical signal into an optical device, such as a highly saturated amplifier, whose small-signal intensity response at the dither frequency dampens the residual amplitude modulation thereby decreasing the eye closure (alternatively, increasing the eye pattern opening). The optical device (e.g., the highly saturated amplifier) exhibits a low frequency cutoff (-3 dB) at a frequency greater than or equal to the inverse of the round trip time for a fiber span with the effective optical transmission length into which the optical signal power is launched. The dither rate is generally in the neighborhood of or below the low cutoff frequency.

REFERENCES:
patent: 5329396 (1994-07-01), Fishman et al.
patent: 5373385 (1994-12-01), Darcie
O. Gautheron et al., "Experimental Investigation of Stimulated Brillouin Scattering and Self-Phase Modulation Effects on Long Distance 2.5 Gbit/s Repeaterless Transmission," Proc. of 19th European Conf. on Optical Communication, vol. 2, Sep. 12-16, 1993, Paper No. TuC4.5, pp. 109-112.

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