title: Digital broadband linearization technique and its application to photonic time-stretch analog-to-digital converter.
abstract: Suppression of distortion induced by nonlinearity in a dynamical system (such as an analog optical link) is very challenging, particularly for a wide-bandwidth signal. Conventional compensation techniques are computationally intensive, significantly limiting their realization in real-time applications. Here, we propose and demonstrate an efficient digital postprocessing technique to suppress distortions added to a wideband signal by a nonlinear system with memory effect. Experimentally, digital broadband linearization of the photonic time-stretch analog-to-digital converter (TSADC) is demonstrated. In case of TSADC, a dynamic range improvement of >15 dB compared to conventional memory-less correction method is achieved.
authors.affiliation: Photonics Laboratory, Department of Electrical Engineering, University of California, Los Angeles, California 90095, USA. motafakk@ee.ucla.edu
authors.forename: Ali
authors.initials: A
authors.lastname: Fard
authors.forename: Shalabh
authors.initials: S
authors.lastname: Gupta
authors.forename: Bahram
authors.initials: B
authors.lastname: Jalali