Reference : Generation of a multi-wavelength source spanning the entire C-band by nonlinear spect...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
Physics and Materials Science
http://hdl.handle.net/10993/47898
Generation of a multi-wavelength source spanning the entire C-band by nonlinear spectral broadening of dual-carrier electro-optic frequency combs
English
VIKRAM, B. S. [Centre for Nano Science and Engineering, Indian Institute of Science, Bengaluru 560012, India]
PRAKASH, ROOPA [Centre for Nano Science and Engineering, Indian Institute of Science, Bengaluru 560012, India]
NAGARJUN, K. P. [Centre for Nano Science and Engineering, Indian Institute of Science, Bengaluru 560012, India]
Singh, Ajay mailto [Centre for Nano Science and Engineering, Indian Institute of Science, Bengaluru 560012, India]
SELVARAJA, Shankar Kumar [Centre for Nano Science and Engineering, Indian Institute of Science, Bengaluru 560012, India]
SUPRADEEPA, V. R. [Centre for Nano Science and Engineering, Indian Institute of Science, Bengaluru 560012, India]
15-Aug-2020
OSA Continuum
Yes (verified by ORBilu)
International
2578-7519
[en] 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.
http://hdl.handle.net/10993/47898
10.1364/OSAC.401107

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