High-power single-mode submonolayer quantum-dot photonic crystal vertical-cavity surface-emitting lasers

Fang I. Lai*, H. P.D. Yang, Kuo-Jui Lin, I. Chen Hsu, Jui Nung Liu, N. A. Maleev, S. A. Blokhin, Hao-Chung Kuo, Jim Y. Chi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


A high-power, wide operation-range single-fundamental-mode InGaAs submonolayer (SML) quantum dot (QD) photonic crystal vertical-cavity surface-emitting laser (VCSEL) for fiber-optic applications was demonstrated. Single-fundamental-mode with a threshold current (Ith) of 0.9 mA and maximum continue-wave (CW) output power of 3.8 mW at 28 mA has been achieved in the 990 nm range. A side-mode suppression ratio (SMSR) larger than 35 dB has been observed over the entire current operating range. The far field measurement shows that the beam divergence angle remains very small and almost unchanged between 6.7-6.9°, with the operation range increasing from 3 to 20 mA.

Original languageEnglish
Pages (from-to)1318-1323
Number of pages6
JournalIEEE Journal on Selected Topics in Quantum Electronics
Issue number5
StatePublished - Sep 2007


  • Divergence angle
  • Quantum-dot
  • Single-mode
  • Submonolayer (SML)
  • Vertical-cavity surface-emitting laser (VCSEL)


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