Abstract :
The authors describe a technique for coupling laser diode (LD) light into a singlemode fibre (SMF) which yields an efficiency as high as 85%, for uncoated micro-optics, with a working distance of 40 μm. The 1 dB excess loss alignment tolerances are ±0.9 and ±4 μm on transverse and optical axes, respectively. This is, to our knowledge, the best optimisation ever reported of the trip]et `coupling efficiency, working distance, and alignment tolerances´ for an uncoated fibre micro-optics arrangement
Keywords :
gradient index optics; lenses; optical couplers; optical fibres; reflectivity; semiconductor lasers; 40 mum; 85 percent; alignment tolerances; coupling efficiency; excess loss alignment tolerance; high efficiency; laser diode; laser diode light; long working distance; optical axes; optimisation; singlemode fibre coupling; transverse axes; uncoated micro-optics; working distance;
