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Whispering Gallery Modes of Quasi-Periodic Photonic Crystal Lasers. Po-Tsung Lee 李柏璁 Department of Photonics & Institute of Electro-Optical Engineering, National Chiao Tung University, Taiwan. Modified Octagonal (8-fold) Quasi-Photonic Crystal (OQPC) Single-Defect Micro-Cavity. OQPC Lattice.

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whispering gallery modes of quasi periodic photonic crystal lasers

Whispering Gallery Modes of Quasi-Periodic Photonic Crystal Lasers

Po-Tsung Lee 李柏璁

Department of Photonics & Institute of Electro-Optical Engineering, National Chiao Tung University, Taiwan

modified octagonal 8 fold quasi photonic crystal oqpc single defect micro cavity
Modified Octagonal (8-fold) Quasi-Photonic Crystal (OQPC) Single-Defect Micro-Cavity

OQPC Lattice

wgm lasing threshold dependence on lattice periods
WGM Lasing & Threshold Dependence on Lattice Periods
  • Threshold – 0.35mW at 1499nm, single-mode lasing
  • Side-Mode Suppression Ratio (SMSR) – 25dB
  • Estimated Quality Factor – 7000

Advantages

  • Very condensed device size (3.5m X 3.5m), which is very potential in photonic integrated circuits
slide4

Dodecagonal (12-fold) Quasi-Photonic Crystal (DQPC) D2 Micro-Cavity

WGM Lasing Action and Comparison with Photonic Crystal Laser

  • Lasing Action:Single-mode lasing at 1574nm with 0.15nm FWHM
  • SMSR:> 20dB
  • Threshold:0.15mW (DQPC D2) < 0.6mW (PC D2)