Mode-Controlled Tapered Lasers Based on Quantum Dots

Pia Weinmann*, Christian Zimmermann, Thomas Walter Schlereth, Christian Schneider, Sven Höfling, Martin Kamp, Alfred Forchel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Wavelength control of tapered quantum dot (QD) lasers was achieved by adding a distributed Bragg reflector as wavelength-selective element to the devices. The Bragg wavelength of around 920 nm is matched to the gain of the single layer of InGaAs QDs that is used as active material. Devices with 1.4-mm-long tapers have reached output powers of over 1 W, and over 2 W were obtained from lasers with 3-mm-long tapers. The emission of the devices is restricted to a very narrow spectral range, with side-mode suppression ratios of over 40 dB.

Original languageEnglish
Pages (from-to)780-784
Number of pages5
JournalIEEE Journal of Selected Topics in Quantum Electronics
Issue number3
Publication statusPublished - May 2009


  • Continuous-wave (CW) lasers
  • distributed Bragg reflector (DBR) lasers
  • quantum dots (QDs)
  • semiconductor lasers
  • DFB
  • NM


Dive into the research topics of 'Mode-Controlled Tapered Lasers Based on Quantum Dots'. Together they form a unique fingerprint.

Cite this