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AssigneeAT&T Bell Laboratories
InventorsDaniel A. Fishman, Jonathan A. Nagel, Yong-Kwan Park
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A technique for reducing the power threshold at which stimulated brillouin scattering ("SBS") occurs within an optical fiber by directly modulating a conventional laser generating an optical signal propagated along that fiber. The modulation is accomplished by employing an alternating waveform to induce a dither upon the laser output. The specific frequency of the alternating waveform is chosen to be very much lower than the low frequency cut-off of any receiver coupled to the optical fiber, but sufficiently high enough to efficiently suppress the Brillouin gain. This dithering causes the laser to be frequency modulated, thereby broadening the effective linewidth of the laser output and increasing the SBS power threshold.
A method for suppressing stimulated Brillouin scattering in an optical transmission system in which an information encoded optical signal originates from an optical source and is transmitted via an optical fiber to at least one optical receiver having a fixed bandwith of sensitivity, wherein:
A method for suppressing stimulated Brillouin scattering within an optical transmission system in which an information encoded optical signal originates from an optical source responsive to an applied bias current, and is transmitted via an optical fiber to at least one optical receiver having a fixed sensitivity bandwidth, wherein:
Dependencies are inferred from the claim text.