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Generation of ultra-wide and flat optical frequency comb based on electro absorption modulator

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Abstract

A novel technique is proposed for the generation of ultra-wide and flat optical frequency comb (OFC) based on serially cascading three stages of electro absorption modulators (EAMs) through sinusoidal radio frequency (RF) signals by setting frequencies at f GHz, f/2 GHz and f/4 GHz. Here, the first stage acts as subcarrier generator, the second stage acts as subcarrier doubler, and the third stage acts as subcarrier quadrupler. In addition, a higher number of subcarriers can easily be generated by adjusting the driving sinusoidal RF signal. In this paper, cascading three stages of EAMs driven by 50 GHz, 25 GHz and 12.5 GHz clock sources, we obtain 272 subcarriers with spacing of 2.5 GHz and power deviation within 1 dB. Theoretical analysis of serially cascaded EAMs for subcarrier generation is also investigated. Principal analysis and simulation of this technique are demonstrated.

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Authors and Affiliations

  1. Department of Electronics Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, 826004, India

    Ujjwal & Jaisingh Thangaraj

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  1. Ujjwal
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  2. Jaisingh Thangaraj
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Correspondence to Ujjwal.

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Ujjwal, Thangaraj, J. Generation of ultra-wide and flat optical frequency comb based on electro absorption modulator. Optoelectron. Lett. 14, 185–188 (2018). https://doi.org/10.1007/s11801-018-7246-3

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  • DOI: https://doi.org/10.1007/s11801-018-7246-3

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