Holographic fabricated photonic-crystal distributed-feedback quantum cascade laser with near-diffraction-limited beam quality | Zendy

Quan-Yong Lu | Zendy; Wei Zhang | Zendy; Lijun Wang | Zendy; Jun-Qi Liu | Zendy; Lu Li | Zendy; Feng-Qi Liu | Zendy; Zhan-Guo Wang | Zendy

Open Access

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

Author(s) -

Quan-Yong Lu,

Wei Zhang,

Lijun Wang,

Jun-Qi Liu,

Lu Li,

Feng-Qi Liu,

Zhan-Guo Wang

Publication year - 2009

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.17.018900

Subject(s) - optics , materials science , laser beam quality , photonic crystal , laser , electron beam lithography , optoelectronics , holography , cascade , quantum cascade laser , diffraction , beam divergence , diffraction efficiency , lithography , physics , laser beams , resist , chemistry , layer (electronics) , chromatography , composite material

We demonstrate the fabrication and characterization of photonic-crystal distributed-feedback quantum cascade laser emitting at 4.7 microm. 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 degrees and 2.5 degrees for stripe widths of 55 microm and 95 microm, respectively. Single-mode emission with a side mode suppression ratio of approximately 20 dB is achieved in the temperature range (80-210 K). The single-facet output power is above 1 W for a 95 microm x 2.5 mm laser bar at 85 K in pulsed operation.

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