IEEE Photonics Journal (Jan 2020)

Injection-Locked Quantum-Dash Laser in Far L-Band 192 Gbit/s DWDM Transmission

  • Mohammed Zahed Mustafa Khan,
  • Emad A. Alkhazraji,
  • Amr Mohamed Ragheb,
  • Maged Abdullah Esmail,
  • Qazi Tareq,
  • Habib Ali Fathallah,
  • Khurram Karim Qureshi,
  • Saleh Alshebeili

DOI
https://doi.org/10.1109/JPHOT.2020.3029026
Journal volume & issue
Vol. 12, no. 5
pp. 1 – 11

Abstract

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Injection locked quantum-dash laser diode-based comb source is employed in wavelength-division multiplexed (WDM) optical transmission covering ~1610 nm L-band optical telecommunication window. An aggregate data rate of 192 Gbits/s (3 × 32 GBaud-QPSK reaching 7% FEC overhead) is demonstrated over three 50 GHz separated channels in coherent transmission over a 10 km-long single mode fiber. A thorough investigation of the radio-frequency (RF) characteristics of all channels is carried out in terms of the linewidth, phase, and frequency noises, showing minimum values of 44 kHz, -80 dBc/Hz, and 5.2 × 1011 Hz2/Hz, respectively. Also, an integrated average relative intensity noise of ~-132 dB/Hz is reported for the central channel. To the best of our knowledge, this constitutes the first report and demonstration of a dense WDM (DWDM) in an extended L-band regime using a comb source.

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