Title :
Integrated micro-cylindrical lens with laser diode for single-mode fiber coupling
Author :
Yongqi Fu ; Ngoi Kok Ann Bryan ; Ong Nan Shing
Author_Institution :
Sch. of Mech. & Production Eng., Nanyang Technol. Inst., Singapore
Abstract :
The integration of a laser diode with a microlens on its emitting surface is introduced in this letter. Calculated results are based on integration of micro-cylindrical lens to laser diode. The lens is directly microfabricated 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 μm as testing prototype, coupling efficiency of the compact and miniaturized system reaches as high as 80.1%. Measured far field angle (full angle) is 2.1 and 31/spl deg/ with and without the lens, respectively.
Keywords :
integrated optics; ion beam assisted deposition; microlenses; optical couplers; optical fabrication; optical fibre couplers; optical focusing; semiconductor lasers; 635 nm; 80.1 percent; FIB machine; SiO/sub 2/; SiO/sub 2/ deposition function; controlled SiO/sub 2/ deposition process; core diameter; coupling efficiency; directly microfabricated; emitting surface; far field angle; focused ion beam; integrated micro-cylindrical lens; laser diode; microlens; miniaturized system; operating wavelength; single-mode fiber; single-mode fiber coupling; Diode lasers; Goniometers; Ion beams; Lenses; Microoptics; Optical fiber testing; Prototypes; Surface emitting lasers; Surface waves; System testing;
Journal_Title :
Photonics Technology Letters, IEEE
