Title :
Microcollimated laser diode with low wavefront aberration
Author :
Ogata, S. ; Sekii, H. ; Maeda, T. ; Goto, H. ; Yamashita, T. ; Imanaka, K.
Author_Institution :
Omron Corp., Kyoto, Japan
Abstract :
A microcollimated laser diode (MCLD) utilizing a 1-mm short focal length, phi 0.5-mm small diameter micro Fresnel lens (MFL) as the collimating lens is discussed. The MCLD is assembled with a 780-nm quantum-well laser diode dice and an MFL in the smallest commercially available laser package. The radiated laser beam from the MCLD has a power of higher than 2 mW at 50 mA driving current, a phi 2 mm beam diameter with a nearly Gaussian intensity profile, and a low wavefront aberration of less than lambda /14 (RMS value) measured at a 1-m distance.<>
Keywords :
aberrations; laser accessories; lenses; optical collimators; semiconductor junction lasers; 0.5 mm; 1 m; 1 mm; 2 mW; 2 mm; 50 mA; 70 nm; beam diameter; collimating lens; driving current; low wavefront aberration; microcollimated laser diode; nearly Gaussian intensity profile; power; quantum-well laser diode dice; radiated laser beam; short focal length; small diameter micro Fresnel lens; Assembly; Collimators; Current measurement; Diode lasers; Laser beams; Lenses; Magnetic flux leakage; Packaging; Power lasers; Quantum well lasers;
Journal_Title :
Photonics Technology Letters, IEEE
