Abstract: A method for transmitting a signal includes providing a source signal and splitting the source signal into a first and second split signal. The first split signal is modulated based on a first dataset. The second split signal is phase shifted and modulated based on a second dataset. The modulated second signal is orthogonally polarized with respect to the polarization of the modulated first signal and combined with the modulated first signal. The combined signal may also be modulated and transmitted.

Abstract: An optical modulator for generating an optical information signal includes a first modulator that modulates an optical carrier with a clock signal. The optical modulator further includes a filter that suppresses a residual carrier component of modulated optical signals. In addition, the optical modulator includes a second modulator for modulating an optical signal with a non-return to zero data signal. When combined, the first and second modulator and the filter operate to transform an optical carrier signal into an optical information signal that is highly tolerant to dispersion and non-linear effects in optical fibers.

Abstract: A method for generating a high-bit rate optical time division multiplexed communication signal includes generating a continuous wave carrier signal. A phase of the carrier signal is modulated separately based on each of a plurality of data signals having a disparate delay with respect to each other to generate a high bit-rate signal. A first portion of the high bit-rate signal is optically delayed with respect to a second portion of the high bit-rate signal and combined to generate a high bit-rate output signal for transmission on an optical fiber.

Abstract: An optical modulator provides for preceding of a high data rate phase modulated optical signal. According to one embodiment, the modulator includes a first phase modulator and a second phase modulator. The first phase modulator modulates an optical carrier signal according to a first data signal to generate a modulated optical signal. The second phase modulator modulates the modulated optical signal according to a time delayed version of its optical output signal. According to another embodiment, the modulator electrically precodes multiple data streams and modulates the precoded data streams using a series of phase modulators to generate a precoded optical data signal.

Abstract: An optical modulator for generating an optical information signal includes a first modulator that modulates an optical carrier with a clock signal. The optical modulator further includes a filter that suppresses a residual carrier component of modulated optical signals. In addition, the optical modulator includes a second modulator for modulating an optical signal with a non-return to zero data signal. When combined, the first and second modulator and the filter operate to transform an optical carrier signal into an optical information signal that is highly tolerant to dispersion and non-linear effects in optical fibers.