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Photonic triangular waveforms generation based on nonlinear polarization rotation using a highly nonlinear fiber



Author(s): Gao, MX (Gao, Mengxiang); Zhu, S (Zhu, Sha); Fan, XJ (Fan, Xiaojie); Li, M (Li, Ming); Zhu, NH (Zhu, Ning Hua); Li, W (Li, Wei)

Source: OPTICAL ENGINEERING Volume: 58 Issue: 11 Article Number: 110501 DOI: 10.1117/1.OE.58.11.110501 Published: NOV 2019

Abstract: We propose a photonic approach to generate triangular waveforms based on nonlinear polarization rotation (NPR) effect in a highly nonlinear fiber. A continuous wave probe light is polarization rotated by an intensity-modulated control light through the NPR effect. By tuning the cascaded polarization controller, the undesired second-order harmonic is well suppressed after photodetection. A 90-deg hybrid coupler is used to compensate the phase mismatch between the fundamental and third-order harmonic components, so that triangular waveforms are generated successfully. The proposed approach is theoretically analyzed and experimentally verified. Triangular waveforms at repetition rates of 3, 4, and 5 GHz with full-duty cycle are experimentally generated. (C) 2019 Society of Photo-Optical Instrumentation Engineers (SPIE)

Accession Number: WOS:000500956500002

ISSN: 0091-3286

eISSN: 1560-2303

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