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Broad-stripe near-diffraction-limited mid-infrared laser with a second-order photonic-crystal distributed feedback grating

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6 Author(s)
Kim, C.S. ; Naval Res. Lab., Washington, DC, USA ; Bewley, W.W. ; Canedy, C.L. ; Vurgaftman, I.
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Electron-beam lithography was used to pattern a second-order photonic-crystal distributed feedback grating onto an antimonide type-II "W" laser emitting at /spl lambda//spl ap/3.7 μm. For pulsed optical pumping, the output beam was essentially diffraction-limited up to a stripe width of 150 μm, and remained no worse than eight times the diffraction limit for stripes as wide as 600 μm. This represents a considerable improvement over all previous mid-infrared semiconductor lasers with such broad stripes.

Published in:

Photonics Technology Letters, IEEE  (Volume:16 ,  Issue: 5 )