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Relative Intensity Noise Suppression for Photonic Links



Craig Nelson, Archita Hati, David A. Howe


We propose and experimentally demonstrate a novel technique to reduce laser relative intensity noise (RIN).  A RIN suppression servo is usually implemented by inserting an intensity modulator in the optical path and controlling measured light intensity with a closed loop servo system.  We propose utilizing the intensity modulator already present in a photonic link to perform the task of RIN suppression as well as encoding the optical signal with the microwave sub-carrier. This technique provides suppression of 10 to 50 dB of laser RIN over a bandwidth of 10 MHz. Furthermore, we implement this technique in an optoelectronic oscillator (OEO), significantly improving its phase-noise performance due to the reduced effect of RIN on the phase noise of the oscillator.
IEEE Photonics Technology Letters


optoelectronic oscillator (OEO), phase noise, relative intensity noise (RIN)


Nelson, C. , Hati, A. and Howe, D. (2008), Relative Intensity Noise Suppression for Photonic Links, IEEE Photonics Technology Letters, [online], (Accessed July 13, 2024)


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Created September 14, 2008, Updated October 12, 2021