Extended electrical tuning of quantum cascade lasers with digital concatenated gratings

S. Slivken, N. Bandyopadhyay, Y. Bai, Q. Y. Lu, M. Razeghi

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

In this report, the sampled grating distributed feedback laser architecture is modified with digital concatenated gratings to partially compensate for the wavelength dependence of optical gain in a standard high efficiency quantum cascade laser core. This allows equalization of laser threshold over a wide wavelength range and demonstration of wide electrical tuning. With only two control currents, a full tuning range of 500 nm (236 cm-1) has been demonstrated. Emission is single mode, with a side mode suppression of >20 dB.

Original languageEnglish (US)
Article number231110
JournalApplied Physics Letters
Volume103
Issue number23
DOIs
StatePublished - Dec 2 2013

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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