Holographie fabricated photonic-crystal distributed-feedback quantum cascade laser with near-diffraction-limited beam quality

Quan Yong Lu*, Wei Zhang, Li Jun Wang, Jun Qi Liu, Lu Li, Feng Qi Liu, Zhan Guo Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Scopus citations

Abstract

We demonstrate the fabrication and characterization of photonic-crystal distributed-feedback quantum cascade laser emitting at 4.7 urn. The tilted rectangular-lattice PCDFB structure was defined using a multi-exposure of two-beam holographic lithography. The devices exhibit the near-diffraction- limited beam emission with the full width at half maximum of the far-field divergence angles about 4.5° and 2.5° for stripe widths of 55 μm and 95 μm, respectively. Single-mode emission with a side mode suppression ratio of «20 dB is achieved in the temperature range (80-210 K). The single-facet output power is above 1 W for a 95 μm × 2.5 mm laser bar at 85 K in pulsed operation.

Original languageEnglish (US)
Pages (from-to)18900-18905
Number of pages6
JournalOptics Express
Volume17
Issue number21
DOIs
StatePublished - Oct 12 2009

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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