Optical transmitter
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsKenkichi Shimomura, Takashi Sugihara, Takashi Mizuochi
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Abstract
An optical modulation processing section is provided which, in turn, includes a signal carrier-suppressed pulse modulating unit that performs signal carrier-suppressed pulse modulation on a light source signal to thereby create a CS-RZ signal, a phase modulating unit that performs phase modulation on a data signal based on the CS-RZ signal to thereby convert the data signal to a phase-modulated signal, and an optical filtering unit that filters out redundant frequency components included in the phase modulation signal.
Claims10
An optical transmitter, comprising an optical modulation processing unit that includes:
- a signal carrier-suppressed pulse modulating unit that performs signal carrier-suppressed pulse modulation on a light source signal to thereby create a carrier-suppressed-return-to-zero signal;
- a phase modulating unit that performs phase modulation on a data signal based on the carrier-suppressed-return-to-zero signal to thereby convert the data signal into a phase-modulated signal;
- and
- an optical filtering unit that filters out redundant frequency components included in the phase-modulated signal.
An optical transmitter, comprising an optical modulation processing unit that includes:
- a phase modulating unit that performs phase modulation on a data signal to thereby convert the data signal into a phase-modulated signal;
- a signal carrier-suppressed pulse modulating unit that performs signal carrier-suppressed pulse modulation on the phase-modulated signal to thereby convert the phase-modulated signal into a phase modulated carrier-suppressed-return-to-zero signal;
- and
- an optical filtering unit that filters out redundant frequency components included in the phase modulated carrier-suppressed-return-to-zero signal.
Dependencies are inferred from the claim text.