A micromachined tunable coupled-cavity laser for wide tuning range and high spectral purity

H. Cai, B. Liu, Xuming Zhang, A. Q. Liu, J. Tamil, T. Bourouina, Q. X. Zhang

Research output: Journal article publicationJournal articleAcademic researchpeer-review

16 Citations (Scopus)


This paper presents the design and experimental study of a coupled-cavity laser based on the micromachining technology for wide tuning range and improved spectral purity. The core part of this design utilizes a deep-etched movable parabolic mirror to couple two identical Fabry-Pérot chips and thus allows the active adjustment of the cavity gap so as to optimize the mode selection and to increase the tuning range as well. In experiment, the laser achieves the single longitudinal mode output over 51.3 nm and an average side-mode-suppression ratio of 22 dB when the tuning current varies from 5.7 - 10.8 mA. The measured wavelength tuning speed is 1.2 μs and the single mode output is stable at any wavelength when the tuning current is varied within ± 0.06 mA. Compared with the conventional fixed cavity gap coupled-cavity lasers, such design overcomes the phase mismatching and mode instability problems while maintaining the merit of high-speed wavelength tuning using electrical current.
Original languageEnglish
Pages (from-to)16670-16679
Number of pages10
JournalOptics Express
Issue number21
Publication statusPublished - 13 Oct 2008
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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