Broadband tuning of continuous wave quantum cascade lasers in long wavelength (> 10μm) range | Zendy

Tatsuo Dougakiuchi | Zendy; Kazuue Fujita | Zendy; Atsushi Sugiyama | Zendy; Akio Ito | Zendy; Naota Akikusa | Zendy; Tadataka Edamura | Zendy

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Broadband tuning of continuous wave quantum cascade lasers in long wavelength (> 10μm) range

Author(s) -

Tatsuo Dougakiuchi,

Kazuue Fujita,

Atsushi Sugiyama,

Akio Ito,

Naota Akikusa,

Tadataka Edamura

Publication year - 2014

Publication title -

optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.394

H-Index - 271

ISSN - 1094-4087

DOI - 10.1364/oe.22.019930

Subject(s) - optics , laser , cascade , lasing threshold , materials science , wavelength , broadband , optoelectronics , quantum cascade laser , continuous wave , physics , chemistry , chromatography

Broadband spectral tuning in the long wavelength range (greater than 10 μm) was demonstrated with an external-cavity quantum cascade laser. The tunable wavelength of the laser ranged from 9.5 to 11.4 μm (176 cm(-1); corresponding to 18% of the center wavelength) in continuous wave (cw) operation at room temperature, without any anti-reflection coating. The gain chip based on the anti-crossed dual-upper-state (DAU) design provided a cw lasing up to 300 K, with a low threshold current density of 2.1 kA/cm2. The highly stable broadband spectral tuning and high laser performance were enabled by the spectrally homogeneous gain profile of the anti-crossed DAU active region.

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