The integration of a laser diode with a microlens on its emitting surface i
s introduced in this letter. Calculated results are based on integration of
micro-cylindrical lens to laser diode. The lens is directly microfabricate
d on the emitting surface of the laser diode with operating wavelength 635
nm by focused ion beam (FIB) SiO2 deposition function. The controlled SiO2
deposition process is realized by programming our FIB machine. Using single
-mode fiber with core diameter of 10 mu m as testing prototype, coupling ef
ficiency of the compact and miniaturized system reaches as high as 80.1.%,
Measured far field angle (full angle) is 2.1 and 31 degrees with and withou
t the lens, respectively.