Optical frequency comb based on nonlinear spectral broadening of a phase modulated comb source driven by dual offset locked carriers

Nagarjun, KP and Vikram, BS and Prakash, R and Singh, A and Selvaraja, SK and Supradeepa, VR (2020) Optical frequency comb based on nonlinear spectral broadening of a phase modulated comb source driven by dual offset locked carriers. In: Optics Letters, 45 (4). pp. 893-896.

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Abstract

We demonstrate a versatile technique to generate a broadband optical frequency comb source in the C-band. This is accomplished by nonlinear spectral broadening of a phase modulated comb source driven by dual frequency offset locked carriers. The locking is achieved by setting up a heterodyne optical frequency locked loop to lock two phase modulated electro-optic 25 GHz frequency combs sourced from individual seed carriers offset by 100 GHz, to within 6.7 MHz of each other. We realize spectral broadening in highly nonlinear fiber after suitable amplification to obtain an equalized, nonlinearly broadened frequency comb. We obtain � 86 lines in a 20 dB band spanning over 2 THz.

Item Type:	Journal Article
Publication:	Optics Letters
Publisher:	OSA Publishing
Additional Information:	Copyright of this article belongs to OSA Publishing
Keywords:	Frequency allocation; Locks (fasteners); Natural frequencies; Optical materials; Optical signal processing; Phase modulation, Frequency combs; GHz frequencies; Highly nonlinear fibers; Optical frequency comb sources; Optical frequency combs; Optical frequency-locked loops; Phase modulated; Spectral broadening, Nonlinear optics, article; plant seed
Department/Centre:	Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	06 Mar 2020 08:51
Last Modified:	06 Mar 2020 08:51
URI:	http://eprints.iisc.ac.in/id/eprint/64693

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