To improve the coupling efficiency between a laser diode and a single-mode fiber, we propose a two-microlens coupling scheme that uses two solgel spherical microlenses for high coupling efficiency. The conventional reflow technique was employed and extended to the inorganic–organic hybrid SiO2/ZrO2 solgel material to form the microlenses. Preliminary results show that the coupling efficiency was increased to −1.28 dB (74.5%) by the proposed scheme, compared with a coupling efficiency of −10.13 dB (9.7%) by the butt-joint method. The proposed fabrication technique demonstrates that use of a reflowed solgel spherical microlens is a cost-effective mass-production approach to application of micro-optical elements in optical communication.
© 2005 Optical Society of America
Original Manuscript: April 22, 2004
Revised Manuscript: October 14, 2004
Manuscript Accepted: October 20, 2004
Published: March 10, 2005
Miao He, Xiaocong Yuan, Jing Bu, Wai Chye Cheong, and Ken Jin Moh, "Reflowed solgel spherical microlens for high-efficiency optical coupling between a laser diode and a single-mode fiber," Appl. Opt. 44, 1469-1473 (2005)