@article{CTT100545397,
  author = {S. M. Ullah and R. Suemitsu and S.H. Lee and Makoto Otake and N. Nishiyama and S. Arai},
  title = {Low-Threshold-Current Operation of High-Mesa Stripe Distributed Reflector Laser Emitting at 1540nm},
  journal = {Jpn. J. Appl. Phys.},
  year = 2007,
}

@article{CTT100545396,
  author = {S.H. Lee and R. Suemitsu and S. M. Ullah and Makoto Otake and N. Nishiyama and S. Arai},
  title = {Very High Electric Isolation Resistance between Distributed Reflector Laser and Front Power Monitor through Deeply Etched Narrow Groove},
  journal = {Jpn. J. Appl. Phys.},
  year = 2007,
}