Vikram, BS and Prakash, R and Nagarjun, KP and Singh, A and Selvaraja, SK and Supradeepa, VR (2020) Generation of a multi-wavelength source spanning the entire C-band by nonlinear spectral broadening of dual-carrier electro-optic frequency combs. In: OSA Continuum, 3 (8). pp. 2185-2194.
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Abstract
We demonstrate a multi-wavelength source with a high repetition rate of 25 GHz, spanning the entire C-band, of which 124 lines lie within 10 dB bandwidth. We exploit the spectral and temporal properties of dual carrier electro-optic combs to simultaneously enhance self-phase modulation (SPM) based broadening and increase the stimulated Brillouin scattering (SBS) threshold. Dual carrier combs are generated through electro-optic modulation of spectrally separated narrow linewidth carriers. They are spectrally broadened in a highly nonlinear fiber after amplification with an in-house built erbium ytterbium co-doped fiber amplifier. The temporal profile of the dual carrier combs consists of significantly narrow pulses (1.4-1.9 ps FWHM) in comparison to the single laser comb (16.5 ps FWHM), increasing the peak power and enhancing the SPM effects. Further, the spectral power is distributed across the comb lines, increasing the SBS threshold and thus the power scalability of the system. These two factors together boost the bandwidth of the spectrally broadened multi-wavelength source. © 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
| Item Type: | Journal Article |
|---|---|
| Publication: | OSA Continuum |
| Publisher: | The Optical Society |
| Additional Information: | The copyright for this article belongs to the Author(S). |
| Keywords: | Bandwidth; Erbium doped fiber amplifiers; Nonlinear optics; Self phase modulation, Electro-optic modulation; Erbium-ytterbium co-doped fiber amplifier; High repetition rate; Highly nonlinear fibers; Multi-wavelength source; Narrow-line width; Spectral broadening; Stimulated Brillouin scattering threshold, Stimulated Brillouin scattering |
| Department/Centre: | Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering |
| Date Deposited: | 13 Jan 2023 06:34 |
| Last Modified: | 13 Jan 2023 06:34 |
| URI: | https://eprints.iisc.ac.in/id/eprint/79101 |
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