Lucent Technologies Incorporated Patent applications |
Patent application number | Title | Published |
20090127472 | Negative Refractive Index Device for Generating Terahertz or Microwave Radiation and Method of Operation Thereof - A negative refractive index device and a method of generating radiation. In one embodiment, the device includes: (1) an optical input configured to receive light and (2) an optical medium having a negative index of refraction and a second-order nonlinearity proximate a center frequency of the light, coupled to the optical input and configured to resonate in response to the light to yield radiation having a phase velocity based on a group velocity of the light. | 05-21-2009 |
20090003845 | Automatic Threshold Voltage Adjustment Circuit for Dense Wavelength Division Multiplexing or Packet Transport System and Method of Operating the Same - An automatic threshold voltage adjustment circuit, a method of automatically adjusting threshold voltage and an optical receiver for an optical communication system. In one embodiment, the circuit includes: (1) an amplitude detector configured to detect an amplitude of a received optical signal, (2) a variable resistor coupled to the amplitude detector and including a field-effect transistor configured to operate in a triad mode to provide a resistance that varies substantially linearly based on the amplitude and (3) an operational amplifier coupled to the variable resistor and configured to apply a variable gain based on the resistance to an input threshold voltage to yield an adapted threshold voltage. | 01-01-2009 |
20090003838 | Optical Data Communication System Having Reduced Pulse Distortion and Method of Operating the Same - An optical data transmission system and a method of communicating data. In one embodiment, the transmission system is part of an optical data communication system that includes: (1) an optical pulse transmitter configured to generate amplitude-modulated optical pulses at a fixed repetition rate, (2) an optical filter coupled to an output of the optical pulse transmitter, having a transmission notch at the fixed repetition rate and configured to filter the optical pulses and (3) an optical detector coupled to an output of the optical filter and configured to produce an output electrical signal representative of intensities of the optical pulses provided by the optical filter. | 01-01-2009 |