Correction: 47.5 ghz membrane-iii-v-on-si directly modulated laser for sub-pj/bit 100-gbps transmission (Photonics, (2021), 8, 31, 10.3390/photonics8020031)

Nikolaos Panteleimon Pandelis Diamantopoulos*, Suguru Yamaoka, Takuro Fujii, Hidetaka Nishi, Koji Takeda, Tai Tsuchizawa, Takaaki Kakitsuka, Shinji Matsuo

*Corresponding author for this work

Research output: Contribution to journalComment/debatepeer-review

Abstract

Error in Figure In the original article [1], there was a mistake in Figure 5c,d as published. The mistake was in the x-axis of the shown eye diagrams, and it was due to a coding error in the MATLAB plotting function that was used. The symbol rate in this work was 60 GBaud. This corresponds to a pulse duration of T = 1/60 GHz ≈ 16.67 ps. Since the x-axis in eye diagrams is commonly between 0 and 2T, the correct x-axis should have been 0~33.33 ps instead of 0~16.67 ps (previously). Another way to confirm the mistake is by noticing that, if 2T ≈ 16.67 ps was assumed, that should have corresponded to a symbol rate of 120 GBaud (instead of 60 GBaud). This is obviously not the case, and such high-speed modulation was never claimed in this work. The corrected Figure 5c,d appear below. The authors apologize for any inconvenience caused and state that the scientific conclusions are unaffected. The original article has been updated. Figure 5. 60 GBaud PAM-4 signal evaluation: (a) Experimental setup; (b) Bit-error rate (BER) versus received optical power at back-to-back (BTB) and after 2-kmSSMF transmissions, and (c,d) Eye diagrams after equalization. Measurements were performed at 25°C (I_b = 9.1 mA) and 50 °C (I_b = 15.1 mA).

Original languageEnglish
Article number407
JournalPhotonics
Volume8
Issue number10
DOIs
Publication statusPublished - 2021 Oct

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Radiology Nuclear Medicine and imaging

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