Technique for detection of optical data signals
AssigneeECI Telecom Ltd.
InventorsUri Mahlab, Michael Gutin
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Abstract
Technology for detecting an optical data signal carried in a combined optical signal that comprises a carrier optical signal modulated by the optical data signal and also comprises ASE noise. The proposed optical data detector/receiver is provided with an SHG device adapted to generate a second harmonic optical signal of the carrier optical signal modulated by the data signal. In the signal, generated by the SHG, the ASE noise will be essentially reduced.
Claims6
A method for reducing Amplifiers Spontaneous Emission (ASE) noise in optical signals upon being transferred via an optical communication line, the method comprising:
- applying, to a Second Harmonic Generating (SHG) device, a combined optical signal comprising at least an optical carrier signal modulated by an optical data signal and also comprising ASE noise accumulated while transferring the modulated optical carrier signal via the optical communication line;
- obtaining a second harmonic optical signal generated by said SHG device from said combined optical signal, wherein in said second harmonic optical signal the ASE noise is essentially reduced while said optical data signal is preserved, and detecting from said second harmonic optical signal, said optical data signal being essentially cleaned from the ASE noise.
An optical data detector, for detecting an optical data signal carried in a combined optical signal comprising a carrier optical signal modulated by the optical data signal and also comprising ASE noise;
- the optical data detector being provided with an SHG device capable of generating a second harmonic optical signal comprising a second harmonic of said carrier optical signal modulated by said optical data signal, wherein said ASE noise being essentially reduced in the generated second harmonic optical signal.
Dependencies are inferred from the claim text.