High-speed VCSEL of modulation bandwidth over 7.0 GHz and its application to 100 m PCF datalink

Achyut Kumar Dutta, Hideo Kosaka, Kaori Kurihara, Yoshimasa Sugimoto, Kenichi Kasahara

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


High-speed vertical cavity surface emitting laser (VCSEL) with 6 x 6 μm active area is fabricated by reducing its pad area in order to reduce its parasitic capacitance. The fabricated VCSEL shows the 3 dB bandwidth of over 7 GHz and average threshold current of 0.7 mA. This is the highest 3 dB modulation bandwidth ever reported for the plan type bottom emitted laser with pad. The maximum intrinsic bandwidth as estimated from k-factor is found to be over 20 GHz, which is less than three times than the observed bandwidth. The thermal characteristics are also found to be almost unchanged due to the reducing of its pad size. It also showed open eye pattern for 3 GHz nonreturn to zero (NRZ) pseudorandom signal after transmission through 100 m large core plastic clad fiber (PCF), which could be used in short and medium distance optical links.

Original languageEnglish
Pages (from-to)870-875
Number of pages6
JournalJournal of Lightwave Technology
Issue number5
Publication statusPublished - 1998 May
Externally publishedYes


  • Datalink
  • Large core plastic clad fiber
  • Modulation bandwidth
  • Pad
  • Vertical cavity surface emitting lasers

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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