Patent ID: 6075634
Filing Date: 2000-06-13
Classification: H04B

Abstract:
A fiber optic communication transceiver comprising:a first opto-electronic receiver, which is coupled to receive an incoming optical signal modulated in accordance with a first information signal, and being operative to output a first electrical signal representative thereof;an outgoing signal and timing regenerator, which is coupled to receive said first electrical signal output by said first opto-electronic receiver and producing therefrom a second electrical signal that regenerates amplitude and timing of said first information signal; anda laser transmitter coupled to receive said second electrical signal produced by said outgoing signal regenerator, and operative to generate an output light signal in accordance with said second electrical signal, said output light signal containing data modulations of said information signal that are effectively free of timing jitter and amplitude noise;a first single mode optical fiber, coupled to said laser transmitter at a first site, and being operative to transport said output light signal generated thereby to a second site;a second single mode optical fiber, over which an incoming light signal from said second site is transported to said first site;a second opto-electronic receiver, which is coupled to receive said incoming light signal, and being operative to output a third electrical signal representative of said incoming light signal from said second site;an incoming signal regenerator, which is coupled to receive said third electrical signal output by said second opto-electronic receiver and producing therefrom a fourth electrical signal that regenerates amplitude and timing of a second information signal contained in said third electrical signal; andan electro-optic transmitter, which is coupled to receive said fourth electrical signal produced by said incoming signal regenerator, and is operative to generate an output optical signal in accordance with said fourth electrical signal; and whereinsaid laser transmitter comprises a laser current driver, which is operative to drive a distributed feedback laser with a controlled extinction ratio drive current in accordance with, but independent of amplitude variations in, said second electrical signal produced by said outgoing signal regenerator.