Dispersion dominated optical communications system and method of pre-dispersion
OwnerSergei Turitsyn, Mariia Sorokinainventors
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Abstract
Communication transmission system and method are disclosed based on introducing a large pre-dispersion of optical signal before launching the signal into an uncompensated communication system. The pre-dispersion has the same sign as dispersion of a transmission fibre. The aim of the method is to improve the transmission quality and simplify the digital signal mitigation of nonlinear impairments after the transmission. In the preferred embodiment, the optical system is a coherent communications system with any symbol rate, modulation format and/or carrier wavelength.
Claims20
An optical communications method for data transmission in nonlinear optical fiber link, comprising:
- introducing a signal pre-dispersion either in optical domain or electronically prior to sending the data via the optical link, wherein a pre-dispersion sign is the same as a sign of the optical link average dispersion thus increasing a signal dispersion when the signal arrives at a receiver site, launching a pre-dispersed signal into the link;
- the signal effectively having many properties of a noise-looking waveform,
- receiving a signal with improved communications performance due to partial mitigating of a signal distortion caused by a link nonlinearity.
An optical system for data transmission, comprising:
- a light source producing an optical beam, which is modulated with data in a modulator and sent to a receiver, wherein prior to sending a modulated beam into a transmission line, a pre-dispersion is introduced in a pre-dispersion unit, which allows achieving an improved system performance.
Dependencies are inferred from the claim text.