Title :
Broad-stripe near-diffraction-limited mid-infrared laser with a second-order photonic-crystal distributed feedback grating
Author :
Kim, C.S. ; Bewley, W.W. ; Canedy, C.L. ; Vurgaftman, I. ; Kim, Marn-Go ; Meyer, J.R.
Author_Institution :
Naval Res. Lab., Washington, DC, USA
fDate :
5/1/2004 12:00:00 AM
Abstract :
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.
Keywords :
diffraction gratings; distributed Bragg reflector lasers; electron beam lithography; high-speed optical techniques; infrared sources; laser beams; optical fabrication; optical pumping; optical testing; photonic crystals; quantum well lasers; 150 mum; 3.7 mum; 600 mum; Gaussian beams; antimonide type-II W laser; broad-stripe laser; diffraction-limited beam; distributed feedback lasers; electron-beam lithography; laser excitation; midinfrared laser; near-diffraction-limited laser; pulse optical pumping; pulsed lasers; quantum-well lasers; second-order photonic-crystal distributed feedback grating; Distributed feedback devices; Gratings; Laser feedback; Lithography; Optical diffraction; Optical pulses; Optical pumping; Pump lasers; Semiconductor lasers; Space vector pulse width modulation;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2004.826265
